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Date: Tue, 8 Jul 2003 10:45:05 -0700
From: Alex Zinin <zinin@psg.com>
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To: l3vpn@ietf.org
Subject: Fwd: WG Action: Layer 3 Virtual Private Networks (l3vpn) Working Group
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References: <200307081544.LAA27599@ietf.org>
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FYI below.
-- 
Alex
http://www.psg.com/~zinin/

This is a forwarded message
From: The IESG <iesg-secretary@ietf.org>
To: 
Cc: rwilder@masergy.com, rcallon@ibnets.com, ronald.p.bonica@mci.com
Date: Tuesday, July 8, 2003, 8:44:44 AM
Subject: WG Action: Layer 3 Virtual Private Networks (l3vpn) Working Group

===8<==============Original message text===============
A new IETF working group has been formed in the Internet Area of the IETF.
For additional information, please contact the Area Directors or the WG Chairs.

Layer 3 Virtual Private Networks (l3vpn)
----------------------------------------

Current Status: Active Working Group


Chair(s):
Rick Wilder <rwilder@masergy.com>
Ross Callon <rcallon@ibnets.com>
Ronald Bonica <ronald.p.bonica@mci.com.>

Internet Area Director(s):
Thomas Narten <narten@us.ibm.com>
Erik Nordmark <erik.nordmark@sun.com>

Internet Area Advisor:
Thomas Narten <narten@us.ibm.com>

Technical Advisor(s):
Alex Zinin <zinin@psg.com>

Mailing Lists:
General Discussion: l3vpn@ietf.org
To Subscribe: https://www1.ietf.org/mailman/listinfo/l3vpn
Archive: https://www1.ietf.org/mail-archive/working-groups/l3vpn/current/maillist.html

Description of Working Group:
Alex Zinin is the routing advisor.

This working group is responsible for defining and specifying a
limited number of solutions for supporting provider-provisioned 
Layer-3 (routed) Virtual Private Networks (L3VPNs).

The WG is responsible for standardization of the following solutions:
     1. BGP/MPLS IP VPNs (based on RFC 2547)
     2. IP VPNs using Virtual Routers
     3. CE-based VPNs using IPSEC

The following VPN deployment scenarios will be considered by the WG:

     1. Internet-wide: VPN sites attached to arbitratry points in the Internet

     2. Single SP/single AS: VPN sites attached to the network of a
        single provider within the scope of a single AS

     3. Single SP/multiple AS'es: VPN sites attached to the network
        of a single provider consisting of multiple AS'es

     4. Cooperating SPs: VPN sites attached to networks of different
        providers that cooperate with each other to provide VPN service

As part of this effort the WG will work on the following tasks
(additional work items will require rechartering):

     1. Requirements and framework for Layer 3 VPNs
     2. Solution documents for each approach listed above (including
        applicability statements)
     3. MIB definitions for each approach
     4. Security mechanisms for each approach

As a general rule, the WG will not create new protocols, but will 
provide functional requirements for extensions of the existing 
protocols that will be discussed in the protocol-specific WGs. L3VPN WG 
will review proposed protocol extensions for L3VPNs before they are 
recommended to appropriate protocol-specific WGs.

Multicast and QoS support are excluded from the charter at this time. 
They may be considered for inclusion in an updated charter at a later 
time. Future work items may also include OAM support.

Goals and Milestones:
Done    Submit L3 VPN Requirements Document to IESG for publication as Info  
Done    Submit Generic Requirements Document to IESG for publication as Info  
Done    Submit L3 VPN Framework Document to IESG for publication as Info  
Dec 03  Submit VPN Security Analysis to IESG for publication as Info 
        (draft-fang-ppvpn-security-framework-00)  
Dec 03  Submit BGP/MPLS VPNs specification and AS to IESG for publication as PS
        (draft-ietf-ppvpn-rfc2547bis-03, draft-ietf-ppvpn-as2547-01)  
Dec 03  Submit CE-based specification and AS to IESG for publication as PS 
        (draft-ietf-ppvpn-ce-based-03, draft-declercq-ppvpn-ce-based-sol-00, 
        draft-declercq-ppvpn-ce-based-as-01)  
Dec 03  Submit Virtual Router specification and AS to IESG for publication as PS 
        (draft-ietf-ppvpn-vpn-vr-03, draft-ietf-ppvpn-as-vr-01)  
Jan 04  Submit VPN MIB Textual Conventions to IESG for publication as PS 
        (draft-ietf-ppvpn-tc-mib-02)  
Jan 04  Submit MPLS/BGP VPN MIB to IESG for publication as PS 
        (draft-ietf-ppvpn-mpls-vpn-mib-05)  
Jan 04  Submit VR MIB to IESG for publication as PS (draft-ietf-ppvpn-vr-mib-04)  
Jan 04  Submit BGP as an Auto-Discovery Mechanism for publication as PS 
        (draft-ietf-ppvpn-bgpvpn-auto-05.txt)  
Mar 04  Submit specification of using IPSEC for PE-PE encapsulation in BGP/MPLS 
        VPNs to IESG for publication as PS (draft-ietf-ppvpn-ipsec-2547-03)  
Mar 04  Submit specification of using GRE for PE-PE encapsulation in BGP/MPLS 
        VPNs to IESG for publication as PS (draft-ietf-ppvpn-gre-ip-2547-02)  
Mar 04  Submit specification of CE Route Authentication to IESG for publication 
        as PS (draft-ietf-ppvpn-l3vpn-auth-03)  
Mar 04  Submit specification of OSPF as the PE/CE Protocol in BGP/MPLS VPNs for 
        publication (draft-rosen-vpns-ospf-bgp-mpls-06.txt)  




===8<===========End of original message text===========





From exim@www1.ietf.org  Tue Jul  8 15:08:31 2003
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Date: Tue, 08 Jul 2003 15:05:41 -0400
To: l3vpn@ietf.org, iesg-secretary@ietf.org
From: Ross Callon <rcallon@juniper.net>
Subject: Correction: Re: Fwd: WG Action: Layer 3 Virtual Private
  Networks (l3vpn) Working Group
In-Reply-To: <87735895341.20030708104505@psg.com>
References: <200307081544.LAA27599@ietf.org>
 <200307081544.LAA27599@ietf.org>
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My correct email address is "rcallon@juniper.net". 

Thanks, Ross

At 10:45 AM 7/8/2003 -0700, Alex Zinin wrote:
>FYI below.
>-- 
>Alex
>http://www.psg.com/~zinin/
>
>This is a forwarded message
>From: The IESG <iesg-secretary@ietf.org>
>To: 
>Cc: rwilder@masergy.com, rcallon@ibnets.com, ronald.p.bonica@mci.com
>Date: Tuesday, July 8, 2003, 8:44:44 AM
>Subject: WG Action: Layer 3 Virtual Private Networks (l3vpn) Working Group
>
>===8<==============Original message text===============
>A new IETF working group has been formed in the Internet Area of the IETF.
>For additional information, please contact the Area Directors or the WG Chairs.
>
>Layer 3 Virtual Private Networks (l3vpn)
>----------------------------------------
>
>Current Status: Active Working Group
>
>
>Chair(s):
>Rick Wilder <rwilder@masergy.com>
>Ross Callon <rcallon@ibnets.com>
>Ronald Bonica <ronald.p.bonica@mci.com.>
>
>Internet Area Director(s):
>Thomas Narten <narten@us.ibm.com>
>Erik Nordmark <erik.nordmark@sun.com>
>
>Internet Area Advisor:
>Thomas Narten <narten@us.ibm.com>
>
>Technical Advisor(s):
>Alex Zinin <zinin@psg.com>
>
>Mailing Lists:
>General Discussion: l3vpn@ietf.org
>To Subscribe: https://www1.ietf.org/mailman/listinfo/l3vpn
>Archive: https://www1.ietf.org/mail-archive/working-groups/l3vpn/current/maillist.html
>
>Description of Working Group:
>Alex Zinin is the routing advisor.
>
>This working group is responsible for defining and specifying a
>limited number of solutions for supporting provider-provisioned 
>Layer-3 (routed) Virtual Private Networks (L3VPNs).
>
>The WG is responsible for standardization of the following solutions:
>      1. BGP/MPLS IP VPNs (based on RFC 2547)
>      2. IP VPNs using Virtual Routers
>      3. CE-based VPNs using IPSEC
>
>The following VPN deployment scenarios will be considered by the WG:
>
>      1. Internet-wide: VPN sites attached to arbitratry points in the Internet
>
>      2. Single SP/single AS: VPN sites attached to the network of a
>         single provider within the scope of a single AS
>
>      3. Single SP/multiple AS'es: VPN sites attached to the network
>         of a single provider consisting of multiple AS'es
>
>      4. Cooperating SPs: VPN sites attached to networks of different
>         providers that cooperate with each other to provide VPN service
>
>As part of this effort the WG will work on the following tasks
>(additional work items will require rechartering):
>
>      1. Requirements and framework for Layer 3 VPNs
>      2. Solution documents for each approach listed above (including
>         applicability statements)
>      3. MIB definitions for each approach
>      4. Security mechanisms for each approach
>
>As a general rule, the WG will not create new protocols, but will 
>provide functional requirements for extensions of the existing 
>protocols that will be discussed in the protocol-specific WGs. L3VPN WG 
>will review proposed protocol extensions for L3VPNs before they are 
>recommended to appropriate protocol-specific WGs.
>
>Multicast and QoS support are excluded from the charter at this time. 
>They may be considered for inclusion in an updated charter at a later 
>time. Future work items may also include OAM support.
>
>Goals and Milestones:
>Done    Submit L3 VPN Requirements Document to IESG for publication as Info  
>Done    Submit Generic Requirements Document to IESG for publication as Info  
>Done    Submit L3 VPN Framework Document to IESG for publication as Info  
>Dec 03  Submit VPN Security Analysis to IESG for publication as Info 
>         (draft-fang-ppvpn-security-framework-00)  
>Dec 03  Submit BGP/MPLS VPNs specification and AS to IESG for publication as PS
>         (draft-ietf-ppvpn-rfc2547bis-03, draft-ietf-ppvpn-as2547-01)  
>Dec 03  Submit CE-based specification and AS to IESG for publication as PS 
>         (draft-ietf-ppvpn-ce-based-03, draft-declercq-ppvpn-ce-based-sol-00, 
>         draft-declercq-ppvpn-ce-based-as-01)  
>Dec 03  Submit Virtual Router specification and AS to IESG for publication as PS 
>         (draft-ietf-ppvpn-vpn-vr-03, draft-ietf-ppvpn-as-vr-01)  
>Jan 04  Submit VPN MIB Textual Conventions to IESG for publication as PS 
>         (draft-ietf-ppvpn-tc-mib-02)  
>Jan 04  Submit MPLS/BGP VPN MIB to IESG for publication as PS 
>         (draft-ietf-ppvpn-mpls-vpn-mib-05)  
>Jan 04  Submit VR MIB to IESG for publication as PS (draft-ietf-ppvpn-vr-mib-04)  
>Jan 04  Submit BGP as an Auto-Discovery Mechanism for publication as PS 
>         (draft-ietf-ppvpn-bgpvpn-auto-05.txt)  
>Mar 04  Submit specification of using IPSEC for PE-PE encapsulation in BGP/MPLS 
>         VPNs to IESG for publication as PS (draft-ietf-ppvpn-ipsec-2547-03)  
>Mar 04  Submit specification of using GRE for PE-PE encapsulation in BGP/MPLS 
>         VPNs to IESG for publication as PS (draft-ietf-ppvpn-gre-ip-2547-02)  
>Mar 04  Submit specification of CE Route Authentication to IESG for publication 
>         as PS (draft-ietf-ppvpn-l3vpn-auth-03)  
>Mar 04  Submit specification of OSPF as the PE/CE Protocol in BGP/MPLS VPNs for 
>         publication (draft-rosen-vpns-ospf-bgp-mpls-06.txt)  
>
>
>
>
>===8<===========End of original message text===========
>





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Date: Thu, 10 Jul 2003 10:30:15 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: L3VPN WG Agenda  (Listerd as PPVPN Wednesday Session)
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Wednesday, July 16
L3VPN WG

1300-1305   Agenda Bashing
                              All
1305-1310   Decision on WG Split
                              AD
1310-1320  Summary of L3VPN Charter
                              Chairs
 1320-1330 Status of WG documents
                              Chairs

Common Documents :

1330-1345   Security Framework for Provider Provisioned Virtual Private
Networks
                    draft-fang-ppvpn-security-framework-01.txt
1345-1400  Framework for PPVPN Operation and Management
                   draft-yacine-ppvpn-mgt-frwk-01.txt
1400-1410   Signaling Tunnel Encapsulation/Deencapsulation Capabilities
                    draft-raggarwa-ppvpn-tunnel-encap-sig-01.txt

L3 documents :

1410-1420     Constrained VPN route distribution
                     draft-marques-ppvpn-rt-constrain-00.txt
1420-1430    RFC2547bis networks using internal BGP as PE-CE protocol
                      draft-marques-ppvpn-ibgp-00.txt
1430-1440     IPv4-Tunnel SAFI
                      draft-nalawade-kapoor-tunnel-safi-00.txt
1440-1450    ISIS as the PE/CE Protocol in BGP/MPLS VPNs
                     draft-sheng-ppvpn-isis-bgp-mpls-00.txt


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<DIV><SPAN class=3D574413913-10072003><FONT face=3DArial color=3D#0000ff =

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<DIV><SPAN class=3D574413913-10072003>Wednesday, July 16</SPAN></DIV>
<DIV><SPAN class=3D574413913-10072003>L3VPN WG </SPAN></DIV>
<DIV><SPAN class=3D574413913-10072003></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D574413913-10072003>1300-1305&nbsp;&nbsp; Agenda=20
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<DIV><SPAN=20
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All</SPAN></DIV>
<DIV><SPAN class=3D574413913-10072003></SPAN><SPAN=20
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<DIV><SPAN class=3D574413913-10072003></SPAN>&nbsp;</DIV>
<DIV><SPAN =
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Security Framework for Provider Provisioned Virtual Private=20
Networks</SPAN><BR><X-TAB>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;<SPAN=20
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&nbsp;</SPAN></X-TAB>draft-fang-ppvpn-security-framework<SPAN=20
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class=3D574413913-10072003>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN></DIV>
<DIV><SPAN class=3D574413913-10072003>1345-1400&nbsp;<!--StartFragment =
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Framework for PPVPN Operation and=20
Management</SPAN><BR><X-TAB>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
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<DIV><SPAN =
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Signaling Tunnel Encapsulation/Deencapsulation=20
Capabilities</SPAN><BR><X-TAB>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;<SPAN=20
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p;&nbsp;&nbsp;=20
&nbsp;</SPAN></X-TAB>draft-raggarwa-ppvpn-tunnel-encap-sig-01.txt&nbsp;&n=
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<DIV><SPAN class=3D574413913-10072003></SPAN>&nbsp;</DIV>
<DIV>L3 documents<SPAN =
class=3D574413913-10072003>&nbsp;:&nbsp;</SPAN></DIV>
<DIV><SPAN class=3D574413913-10072003>&nbsp;</SPAN></DIV>
<DIV><SPAN class=3D574413913-10072003></SPAN><SPAN=20
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distribution<SPAN class=3D574413913-10072003>&nbsp;</SPAN></DIV>
<DIV><SPAN=20
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<DIV><SPAN=20
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N=20
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class=3D574413913-10072003>&nbsp;<!--StartFragment -->IPv4-Tunnel=20
SAFI</SPAN></DIV>
<DIV><SPAN=20
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From exim@www1.ietf.org  Wed Jul 16 04:25:45 2003
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From: Loa Andersson <loa@pi.se>
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To: ppvpn@nortelnetworks.com, l2vpn@ietf.org, l3vpn@ietf.org
Subject: the ppvpn agenda in Vienna: l3vpn and l2vpn
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All,

as result of the decission on splitting the ppvpn group in one
l3vpn wg and one l2vpn wg came close to the actual meeting
it has not been time to update the IETF online agendas.

However, the meeting Wednesday July 16th at 1PM will be the
first meeting of the l3vpn working group and the meeting
Thursday July 17th at 1PM will be the first meeting of the
l2vpn working group.

Both these meetings shows up as ppvpn meetings on the online
agenda.

-- 
/Loa

mobile + 46 739 81 21 64
email: loa@pi.se





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Date: Mon, 21 Jul 2003 09:38:21 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: WG mailing list
To: l3vpn@ietf.org
Cc: ppvpn@nortelnetworks.com
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Folks,

The IETF L3VPN WG conducts its business on l3vpn@ietf.org. In order to
subscribe, visit https://www1.ietf.org/mailman/listinfo/l3vpn.

The WG chairs will unsubscribe from ppvpn@nortelnetworks.com this week. In
order to unsubscribe from this list, send mail to lyris@nortelnetworks.com.
Include the following command in the message body:

 unsubscribe ppvpn

===========================================
Ronald P. Bonica       Ph: 703 886 1681
vBNS Engineering       page: 1 888 268 8021
Ashburn, Va.
===========================================
"If a man marches out of step with his
fellows it may be that he hears the sound
of a different drummer or, perhaps that
he has a poor sense of rhythm."
            -- Henry David Thoreau





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Date: Tue, 22 Jul 2003 09:56:28 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: WG Focus Item
To: l3vpn@ietf.org
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Folks,

During the next two weeks, please dedicate some time to reviewing
draft-fang-ppvpn-security-framework-01. Send comments to this mailing list.
When comments have been received, the authors will spin a new version and we
will have a WG last call.

We need to send this draft to the ADs/IESG fairly quickly a) because it is
important and b) because so many other drafts depend upon it.

===========================================
Ronald P. Bonica       Ph: 703 886 1681
vBNS Engineering       page: 1 888 268 8021
Ashburn, Va.
===========================================
"If a man marches out of step with his
fellows it may be that he hears the sound
of a different drummer or, perhaps that
he has a poor sense of rhythm."
            -- Henry David Thoreau





From exim@www1.ietf.org  Tue Jul 22 12:25:34 2003
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Date: Tue, 22 Jul 2003 12:16:57 -0400
To: l3vpn@ietf.org
From: Ross Callon <rcallon@juniper.net>
Subject: FYI: PPVPN Internet Draft relocation to L3vpn working group
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As a result of the ppvpn split into two working groups, the
various working group documents need to be re-issued.
Some will be re-issued as l3vpn documents, some as
l2vpn documents.

The message below is requesting the appropriate documents
be re-issued as l3vpn documents (the Layer 2 documents 
were requested separately by the L2 chairs). 

thanks, Ross

>X-Sender: rcallon@zircon.juniper.net
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>Date: Tue, 22 Jul 2003 12:10:30 -0400
>To: ietf-action@ietf.org
>From: Ross Callon <rcallon@juniper.net>
>Subject: PPVPN Internet Draft relocation to L3vpn working group
>Cc: rcallon@juniper.net
>
>Due to the split of the ppvpn working group into two working 
>groups, we would like the following internet drafts re-issued with 
>a new name. All should be considered to be l3vpn working group 
>drafts:
>
>draft-ietf-ppvpn-requirements-06.txt 
>(Service requirements for Layer 3 Provider Provisioned Virtual Private Networks) 
>should be re-issued as draft-ietf-l3vpn-requirements-00.txt
>
>draft-ietf-ppvpn-framework-08.txt 
>(A Framework for Layer 3 Provider Provisioned Virtual Private Networks) 
>should be re-issued as draft-ietf-l3vpn-framework-00.txt
>
>draft-ietf-ppvpn-ce-based-03.txt 
>(An Architecture for Provider Provisioned CE-based Virtual Private Networks using IPsec) 
>should be re-issued as draft-ietf-l3vpn-ce-based-00.txt
>
>draft-ietf-ppvpn-bgp-ipv6-vpn-03.txt 
>(BGP-MPLS VPN extension for IPv6 VPN) 
>should be re-issued as draft-ietf-l3vpn-bgp-ipv6-00.txt
>
>draft-ietf-ppvpn-mpls-vpn-mib-05.txt 
>(MPLS/BGP Virtual Private Network Management Information Base Using SMIv2) 
>should be re-issued as draft-ietf-l3vpn-mpls-vpn-mib-00.txt
>
>draft-ietf-ppvpn-rfc2547bis-04.txt 
>(BGP/MPLS VPNs) 
>should be re-issued as draft-ietf-l3vpn-rfc2547bis-00.txt
>
>draft-ietf-ppvpn-ipsec-2547-03.txt 
>(Use of PE-PE IPsec in RFC2547 VPNs) 
>should be re-issued as draft-ietf-l3vpn-ipsec-2547-00.txt
>
>draft-ietf-ppvpn-gre-ip-2547-02.txt 
>(Use of PE-PE GRE or IP in RFC2547 VPNs) 
>should be re-issued as draft-ietf-l3vpn-gre-ip-2547-00.txt
>
>draft-ietf-ppvpn-bgpvpn-auto-05.txt 
>(Using BGP as an Auto-Discovery Mechanism for Provider-provisioned VPNs) 
>should be re-issued as draft-ietf-l3vpn-bgpvpn-auto-00.txt
>
>draft-ietf-ppvpn-vpn-vr-04.txt 
>(Network based IP VPN Architecture using Virtual Routers) 
>should be re-issued as draft-ietf-l3vpn-vpn-vr-00.txt 
>
>draft-ietf-ppvpn-vr-mib-05.txt 
>(Virtual Router Management Information Base Using SMIv2) 
>should be re-issued as draft-ietf-l3vpn-vr-mib-00.txt
>
>draft-ietf-ppvpn-tc-mib-02.txt 
>(Definition of Textual Conventions for Provider Provisioned Virtual 
>Private Network (PPVPN) Management) 
>should be re-issued as draft-ietf-l3vpn-tc-mib-00.txt
>
>draft-ietf-ppvpn-as2547-01.txt 
>(Applicability Statement for VPNs Based on rfc2547bis) 
>should be re-issued as draft-ietf-l3vpn-as2547-00.txt
>
>draft-ietf-ppvpn-applicability-guidelines-02.txt 
>(Guidelines of Applicability Statements for PPVPNs) 
>should be re-issued as draft-ietf-l3vpn-applicability-guidelines-00.txt
>
>draft-ietf-ppvpn-as-vr-02.txt 
>(Applicability Statement for Virtual Router-based Layer PPVPN approaches) 
>should be re-issued as draft-ietf-l3vpn-as-vr-00.txt 
>
>draft-ietf-ppvpn-l3vpn-auth-03.txt 
>(CE-to-CE Member Verification for Layer 3 VPNs) 
>should be re-issued as draft-ietf-l3vpn-auth-00.txt
>
>draft-ietf-ppvpn-generic-reqts-03.txt 
>(Generic Requirements for Provider Provisioned VPN) 
>should be re-issued as draft-ietf-l3vpn-generic-reqts-00.txt
>
>draft-ietf-ppvpn-ospf-2547-01.txt 
>(OSPF as the PE/CE Protocol in BGP/MPLS VPNs) 
>should be re-issued as draft-ietf-l3vpn-ospf-2547-00.txt
>
>thanks, Ross





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Date: Tue, 22 Jul 2003 12:57:36 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: IETF 57 L3VPN Minutes
To: l3vpn@ietf.org
Message-id: <DKEJJCOCJMHEFFNMLKMPMEPHJNAA.Ronald.P.Bonica@mci.com>
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Folks,

Please review these minutes. If there are no objections, I will post them to
the record one week from today.

                                                  Ron

=====================


PPVPN L3 PPVPN
--------------

July 16, 2003 -- 1300-1500
IETF 57 -- Vienna, Austria
 Chairs: Ron Bonica & Ross Callon

Mintes Recorded By: Danny McPherson and Adrian Farrell

--------------------------------------------------------
Agenda Bashing (no comments)

Alex Zinin: Comments on PPVPN WG Split (to L2VPN & L3VPN)

 o PPVPN will be shut down after draft relocation
 o Thomas Narten will be responsible AD for both L2VPN & L3VPN
 o Rick Wilder, Loa Andersson & Vach Kompella are L2VPN Chairs
 o Rick Wilder, Ross Callon & Ron Bonica are L3VPN Chairs
 o Subscribe to new mailing lists, ppvpn@ will be closed

--------------------------------------------------------
Thomas Narten: Comments from AD, co-AD is Margaret Wasserman

 o Group split and move to Internet Area to couple all related
   technologies in same area.  PWE3 still in

--------------------------------------------------------
Ron Bonica: Charter Stuff

 WG Documents/Chartered:
  - Requirements & Framework
  - Security Framework
  - Three Specific Solutions
  - MIBs
  - Alternative Encaps

  o Out of Charter: Multicast & QoS.  Hold off on submitting work until in
charter.

  o Group does not specify protocols
  o [Others I missed]


--------------------------------------------------------
Ross Callon:  Document Status

 o L3VPN Framework has been approved by IESG for publication
 o L3 Service Requirements passed WG LC but terminology issues and alignment
in progress
 o Generic Requirements updated to resolve IESG comments, letter on IESG
comment resolution on way to IESG

 o Work on Security Framework needs to happen
 o IESG would like security of each approach, work ongoing

 o Applicability statements.
  - VR: Recent Updates
  - BGP IP VPNS:
  - CE/IPSEC

 o Issues on Applicability Guidlines?

  - What is long-term disposition?
  - Should there be seperate L2 & L3 documents or should they stay together?

 o MIBs & Network Management

  - OAM disucssion to follow
  - Textual Conventions: Stable
  - MPLS/BGP MIB: Stable
  - VR MIB: Recent Update for Clarity
  - Requirements for MPLS MIBs: comments to authors of different MIBs
  - CE MIB: TBD.

 o Other WG Documents

  - 2547 for IPv6: Stable
  - PE-PE IPSEC for 2547: Stable
  - PE-PE GRE or IP for 2547: Stable
  - BGP as Auto-Discovery: Stable

 - OSPF as PE/CE re-issued in June
 - [missed one]


--------------------------------------------------------
Luyuan Fang: PPVPN Security Framework Document

 o Motivation: Security FW needs to be defined to progress other WG items
 o Initiated in Atlanta @IETF 55
 o In security area already have well-defined user requirements
 o Need to provide secure VPN services to users, must protect network &
subscribers
 o Defined templates to analyze security properties of different VPN
solutions


 Status:
  - Started in ATL @IETF55
  - Presented first work in San Francisco
  - Collecting feedback on mailing list
  - -01 draft currently published, close to final form
  - Filled in "Section 8"

 Outline:
  1) Intro
  2) PPVPN Security Reference Model
  3) Security Threats
  4) Defensive Techniques
  5) Monitoring, Detection & Reporting of Security
  6) User Security Requirements
  7) Provider Security Requirements
  8) Templates

  - Not meant to address every requirement
  - Every technology need not satisfy every requirement
  - Not in scope of draft to address individual technologies

  - Section 8 on templates: to assit in evaluating and summarizing

  - Would like feedback on document!
  - Ask to move draft to WG document
  - Get feedback from Security WG

Dave McDysan: We have Security requirements, Generic Requirements and
L3-specific requirements.  This document may delay publication of other
documents -- which may be a good thing!

Ron Bonica: Comments in next two weeks.  Luyuang needs to collect input from
other sources.  Publish new version and send to WG LC to avoid log-jam and
chance

Paul Hoffman: Should section 8 be full of templates or?  Need to be
clear this and other documents must be read to get all information that's
needed.

Ron Bonica:  We'll adopt as WG document and see new spin in a few weeks.
Wait on new revision of document and then do WG LC.

Chair: Asked for show of hands for support of document, lots of hands.
No one opposed.
--------------------------------------------------------

Thomas Nadeau: Proposed PPVPN Management Framework

 o Starting point was draft-yacine-ppvpn-mgt-framework00.txt
 o Cleaned up and aligned since last meeting to align with goals
   and requirements of WG.

 o Need to add overall MIB architecture and view much like MPLS

 o Need to talk more about customer managment
 o Service OAM (OAM for VPN and interactions with VPN substrate)
 o Consider renaming to Framework for VPN OAM
 o Get more WG input

 o Question: Consider as WG draft (may be charter issues)

Ross Callon: Alex Zinin says it's fine if we accept as WG document.
We can go to IESG to get charter updated to get the document as WG
document.

Chair: Asked for show of hands for support of documents, lots of hands
go up.  No one opposed.


--------------------------------------------------------
Rahul Aggarwal:

 o Mechanism for signaling PE tunnel encap capabilities.

 Motivations:

 o Blackhole Avoidance
 o Co-existing MPLS & IP encap

 BGP Tunnel Capability SAFI
 LDP Tunnel Encap Capabilities (may not be necessary per BGP)
 IANA Considerations

Request to be a WG document in L3 VPN WG.

AD (Alex Zinin): If L3 VPN supports IDR needs to do technical
review.  Doesn't believe that document can become a WG document
per BGP changes.  Needs to verify if this is real problem, then
choice of moving whole draft to IDR or splitting document into
separate drafts.

Rahul: What is procedure for extensions?

(AD) Alex Zinin: Protocol-specific procedures go to protocol WG.

Rahul Aggarwal: What is procedure for extensions?

(AD) Thomas Narten: If this is real problem then qualify on mailing list
and then we'll go from there.

How many people have read the document?  Lots of hands go up?
How many people think this is a valid problem? Lots of hands go up.
How many people think work should not be done?  No hands.

--------------------------------------------------------
Pedro Marques: Constrained VPN Route Distribution

Problem: VPN Route Distribution Layer must carry routes for all VPNs
Goal: Reduce number of routes carried in all RRs by taking advantage
      of locality

Ross Callon: Is this a problem the WG should be concerned about?
Ross Callon: Is this a problem the WG should be concerned about?

Who's read the document?  Modest number.
Who thinks we should be concerned about: modest number
Should this not become a WG document: 1 hand.

Yakov: Protocol Extension.  Lots of interoperable implementations

Pedro: Does not modify existing standard to BGP, but AD/IESG

AD (Thomas Narten): Does this change bits or protocol?

Pedro: No, introduces NEW bits!

Dave Ward: Disagrees, thanks it changes fundamental BGP behavior.

AD (Thomas Narten): Would like to hear from folks who said no to
the problem, why?

WHO?: Problem is that it needs to be done in IDR, not L3 VPN

Pedro: Just here toi ask WG opinion of is problem is real and is
 this is a valid.

AD (Alex Zinin): Will show up in IDR, concentrate on solution
properties here.

George Swallow: Scalability is an issue and always worth tackling.
 As long as proposal is sound in IDR ir should be OK here.

Luyuan Fang: This is a real problem.

--------------------------------------------------------
Pedro Marques: Use IBGP as PE-CE Protocol

Ron Bonica: Is CE device peering with you using AS number is there
restriction
 of him using that AS number with other networks?

Pedro: He only sees his own AS number, doesn't see which AS Paths occur in
 provider network.

Joel Halpren: Looks like useful tool.  IDR should build as
general tool and
 use it for other stuff.  Else IDR says it's crazy and we shouldn't do it.

Pedro: Only relates to 2547, belongs in PPVPN.

WHO?: Why would we run IBGP with a domain we don't control?  How do you
 safeguard IGP/IBGP with this?

Pedro:  No assumption IGP is being run.

Ross Callon: Issue is whether this is useful, where work falls is
  subsequent.

(AD) Alex Zinin: Agress with Ross.


--------------------------------------------------------
Lede Feng: IS-IS as PE-CE Protocol in BGP/MPLS VPN

Motivation: In 2547 lots of PE/CE protocols.  IS-IS not
 defined.
 - In OSPF case lots of drafts
 - No IS-IS draft

Would like to progress as WG document

How many have read this?  (not many hands)

Feng: China Telecom Requests that it be implemented.

Question: Should we only suppory wide-metrics?
Question: Does this support IS-IS Admin tags?

Danny McPherson: Is this being defined for sake of defining it
(i.e., because other protocols have already been defined) or is
this really demand driven?  Are customers really running IS-IS
and considering this for CE-PE protocol?

Request for show of hands for interest in pursuing this work: None

Need to take it to the list.

--------------------------------------------------------
Gargi: Tunnel Encap signaling using Tunnel SAFI

New IPv4-Tunnel SAFI

Comment: Why do we need this?  Also, how do you deal with
>misconfiguration?

Gargi: SAFI signaled to all other PEs in the network.

Comment: Same as Rahul's draft/preso.

Danny McPherson: These are the same problem, two document
authors should work together.

Rahul/Others: Draft authors will work together.





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Date: Tue, 22 Jul 2003 13:07:40 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: presentation slides
To: l3vpn@ietf.org
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Folks,

If you presented to the L3VPN WG at IETF 57, please send me your slides so
that I can attach them to the minutes.

===========================================
Ronald P. Bonica       Ph: 703 886 1681
vBNS Engineering       page: 1 888 268 8021
Ashburn, Va.
===========================================
"If a man marches out of step with his
fellows it may be that he hears the sound
of a different drummer or, perhaps that
he has a poor sense of rhythm."
            -- Henry David Thoreau





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[cross-post to L3VPN WG]

	The forthcoming version of the PPVPN-MPLS-VPN
MIB will indeed include the VPN labels used by the
VRF.  This has been something that many operators have
asked us to include. I believe that
we are also considering the inclusion of a XCindex
so that you can go from the VPN label to find
the IGP label as well.  Still working out some 
minor details.

	--Tom


> >X-MindSpring-Loop: rogerw@nordlink.com
> >Resent-Date: Wed, 23 Jul 2003 05:52:34 -0400
> >X-Authentication-Warning: host.secure4-hosting.net: mplsrc12 
> set sender 
> >to
> >mpls-ops-request@mplsrc.com using -f
> >From: "Morris, Stephen" <Stephen.Morris@marconi.com>
> >To: mpls-ops@mplsrc.com
> >Date: Wed, 23 Jul 2003 05:39:15 -0400
> >X-Mailer: Internet Mail Service (5.5.2653.19)
> >Subject: [MPLS-OPS]: Tying VRFs to LSPs
> >Resent-From: mpls-ops@mplsrc.com
> >X-Mailing-List: <mpls-ops@mplsrc.com> archive/latest/6143
> >X-Loop: mpls-ops@mplsrc.com
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> >Resent-Bcc:
> >
> >Is there any way of associating (in SNMP) a set of VRFs in a 
> given VPN 
> >with the core LSP(s) that provide connectivity for that VPN? Best 
> >wishes Stephen Morris
> >
> >-------
> >The MPLS-OPS Mailing List
> >Subscribe/Unsubscribe:  http://www.mplsrc.com/mplsops.shtml
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> -------
> The MPLS-OPS Mailing List
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> 






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Date: Wed, 23 Jul 2003 15:00:27 -0400
From: Dave McDysan <dave.mcdysan@mci.com>
Subject: MPLS 2003 International Conference
To: Mpls <mpls@UU.NET>, Ccamp <ccamp@ops.ietf.org>, l2vpn@ietf.org,
        l3vpn@ietf.org, pwe3@ietf.org
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     MPLS 2003 International Conference
     Omni Shoreham Hotel, Washington D.C.
     October 26-28, 2003
==================================================================
    http://www.mpls2003.com
==================================================================

You are cordially invited to attend the MPLS 2003 International Conference
to be held in Washington D.C. October 26-28, 2003 hosted by ISOCORE. The
3-day event consists of highly technical sessions, tutorials, panel
discussions, and exhibits.

Registration for the conference is now open. Early registration discounts
are extremely lucrative and are valid for a limited time only. To register,
go to:
 http://www.mpls2003.com/registration.htm

Important Dates:
---------------------
- Early Registration Rates Cut-Off Date: July 30
- Tutorials: October 26, 9:00am - 5:30 pm
- Conference sessions: October 27-28, 8:45am-6:30pm
- Exhibits: October 27-28, 8:45am-6:30pm

Program:
--------
(visit http://mpls2003.com/sessions.htm for details)

Sunday October 26
 Tutorial 1
 Tutorial 2: VPNs
 Tutorial 3: Layer 2 VPNs/VPLS
 Tutorial 4: MPLS Security

Monday, October 27
 Opening remarks - Peter Hill (BellSouth Telecommunications) & Dr. Hamid
Ahmadi (AT&T Labs)
 Introduction - Luca Martini (Level3 Communications)
 Keynote

 Session: Convergence (Service Provider's Perspective)
  - What is the Role of MPLS in Network Convergence?
  - MPLS: The Catalyst of Convergence?

 Session: OAM
  - New Developments in MPLS and IP OAM
  - Network Management of MPLS-based VPNs
  - MPLS Convergence, Control and OAM Implications
  - Service OA&M for MPLS VPNs

 Session: Reliability
  - High Availability for MPLS LSRs
  - Next Generation Core Routers: Defining IP Reliability and Resiliency
  - High Resiliency MPLS Network Design
  - Hardening MPLS-based Networks

 Session: L2/L3 VPNs
  - BGP-VPN Services: Lessons Learned
  - Design and Deploy Scalable Inter-AS MPLS VPNs
  - L2-MPLS Networks
  - MPLS in Multi-AS Networks

 Panel: MPLS as a Fusing Technology
  - Chair: P. Hill, VP Technology Planning & Deployment, BellSouth
Telecommunications

  - Members: D. McDysan (MCI), C. Kalmanek (ATT), P. Delavenne (LambdaNet),
R. Wilder (Masergy), R. Doukov (Flag Telecom), McManus (Verizon), C.
Liljenstolpe
(Cable & Wireless), Y. Sato (NTT)


Tuesday, October 28
 Keynote
 Lessons Learned - Yakov Rekhter
 Critical Considerations for Network Consolidation - Daniel Awduche (MCI)


 Session: Layer 2 Transport & Interworking over MPLS
  - VPLS - Remember LANE?
  - Transitioning a Profitable Service Portfolio to an MPLS Core Network
  - VPLS Provisioning, Performance and Scalability: Problems and Solutions

 Session: IP Optical Integration
  - Optical Market Forces on GMPLS
  - Multiservice Metro Networks in Sweden and Their Plans to Go GMPLS
  - Photonic Internet Laboratory: New Challenges for Future Photonic Network
  - Generalized VPNs (GVPNs)

 Session: New MPLS Features
  - Scalable Multicast MPLS Technology for Next Generation Broadband
Services
Network
  - Multicast Traffic Engineering with MPLS
  - LDP Fast Convergence
  - How to secure an MPLS/VPN network
  - Integration of IPv6 and IPv6 VPN Services over MPLS

 Session: Traffic Engineering
  - Inter-area and Inter-AS MPLS Traffic Engineering
  - Traffic Engineering in Hierarchical Multiprovider Networks
  - Multi-Region (multiarea/multiAS) Traffic Engineering
  - Advanced MPLS Application Testing

 Session: Service & Provisioning Issues
  - MPLS Network Management: Enterprise Deployment Management
  - Attracting New Enterprise Customers with MPLS VPN Services
  - MPLS Beyond Service Provider Cores
  - Critical Quality of Service Issues in MPLS Networks
  - Practical Implementation of Tools Allied to the Network Management of
IP/MPLS-based Networks


We look forward to seeing you at the Conference.

Regards,

Dave McDysan, Luca Martini, Bijan Jabbari





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Reply-To: <tnadeau@cisco.com>
From: "Thomas D. Nadeau" <tnadeau@cisco.com>
To: "'Ron Bonica'" <Ronald.P.Bonica@mci.com>, <l3vpn@ietf.org>
Subject: RE: presentation slides
Date: Tue, 22 Jul 2003 13:43:55 -0400
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> -----Original Message-----
> From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org] On 
> Behalf Of Ron Bonica
> Sent: Tuesday, July 22, 2003 1:08 PM
> To: l3vpn@ietf.org
> Subject: presentation slides
> 
> 
> Folks,
> 
> If you presented to the L3VPN WG at IETF 57, please send me 
> your slides so that I can attach them to the minutes.
> 
> ===========================================
> Ronald P. Bonica       Ph: 703 886 1681
> vBNS Engineering       page: 1 888 268 8021
> Ashburn, Va.
> ===========================================
> "If a man marches out of step with his
> fellows it may be that he hears the sound
> of a different drummer or, perhaps that
> he has a poor sense of rhythm."
>             -- Henry David Thoreau
> 
> 

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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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Network Working Group                                        Sheng Cheng
INTERNET DRAFT                                                    Liu Yu
Expiration Date: October 2003                                  Li Defeng
                                                     Huawei =
Technologies.
                                                =20
                                                     	    Chen Yunqing
                                                 China Telecommunication
                                                              April 2003



                ISIS as the PE/CE Protocol in BGP/MPLS VPNs

                    draft-sheng-isis-bgp-mpls-vpn-00.txt


Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.


Abstract

   IS-IS protocol, which is specified in [1], can be used as IGP between =

   the Customer Edge (CE) router and the Provider Edge (PE) router in=20
   BGP/MPLS VPNs as per [1]. This document provides a detailed solution=20
   for IS-IS working as PE/CE Protocol in VPN services specified in [1]. =

  =20
  =20
  =20
  =20
  =20
  =20
  =20
  =20

Cheng Sheng             Expires October 2003                  [Page 1]

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 =20

  =20
Table of Contents

    1        Terms .................................................   2
    2        Introduction ..........................................   2
    3        Fundamental Requirments  ..............................   3
    3.1      Assumptions ...........................................   3
    3.2      Multiple instances  ...................................   3
    3.3      IS-IS interaction with BGP on PE  .....................   3
    3.4      Supplement.............................................   3
    4        Extended Requirments ..................................   4
    4.1      Sham Links  ...........................................   4
    4.2      Carry IS-IS imformation with BGP Extended communities .   4
    4.3      Route loop prevention on PEs  .........................   5
    4.4      IS-IS interaction with BGP on PE  .....................   5
    4.5      Sham-link Creation  ...................................   6
    5        Acknowledgments  ......................................   7
    6        References  ...........................................   7
    7        Authors' Address  .....................................   7
   =20

1.  Terms

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119.


2.  Introduction

   The IS-IS protocol is specified in ISO 10589, with extensions for=20
   supporting IPv4 (Internet Protocol) specified in RFC 1195 [IS-IS].

   [VPN] describes a VPN service architecture, in which BGP is used to=20
   distribute IP-VPN routes between PEs in IP backbone. A CE router
   can then learn the routes to other CE sites in the same VPN by=20
   peering with its attached PE router through a routing protocol. The
   routing protocol is in charge of exchanging routes between PE and
   its attached CE. It has been proved till now that BGP, OSPF or RIP=20
   can help. And of course, IS-IS can do it as well. =20

   Obviously, as one of the most widely used IGPs, IS-IS is capable=20
   of distributing routes of CE to PE router. Using IS-IS on the=20
   PE-CE link is prefered especially when the VPN use IS-IS as
   its intra-site routing protocol, which means less administative=20
   expense and good backward compatibility.=20

   This draft is mainly focusing on proposing two different solutions,=20
   in which one is fundamental and the other is somewhat complicated,
   to implement IS-IS between PE and its attached CE.




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3.  Fundamental Requirments

    In this part, some basic requirements have been listed out to=20
    address the issues of IS-IS working on PE-CE link.

3.1 Assumptions

		     +-----+         +-----+
		     | PE1 |---------| PE2 |=20
		     +-----+         +-----+
		        |               |
		        |               |
		     +-----+         +-----+
		     | CE1 |         | CE2 |=20
		     +-----+         +-----+

    Two different sites of one VPN are not connected by direct(backdoor)
    link. Further, if this physical link dose exist, there is no IS-IS=20
    adjacency over the backdoor link. If this can not be avoided, the=20
    second solution described in 4 should be choosed.

3.2 Multiple instances
   =20
    Multiple IS-IS instances should be supported on PE, which means=20
    multiple IS-IS instances can run in one PE with each bound to=20
    one specific VRF.
   =20
    The relationship between IS-IS instances and VRFs is listed as=20
    follows: Multiple IS-IS instances can be associated with the=20
    same VRF (n:1). A single IS-IS instance should not be associated=20
    with multiple VRFs (1:n). Of course, a single IS-IS instance can be
    associated with just a single VRF.
   =20
3.3 IS-IS interaction with BGP on PE

    The PE router should have the capability to import IS-IS and BGP
    routes to/from a particular VRF with each other.=20
   =20
    When importing the BGP routes into a single IS-IS instance bound to
    a specific VRF on PE, the routes will always be regarded as=20
    external routes and IS-IS deliver the route with external=20
    reachability TLV(TLV 130) in IS-IS LSP. The level of the converted=20
    IS-IS LSP is decided through configuration.

3.4 supplement

   - There is no special toplogy limitation for PE/CE link and CE's=20
     sites.
  =20
   - There is no special requirement for CE router.=20


Cheng Sheng             Expires October 2003                  [Page 3]

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  =20
4.  Extended Requirments

		     +-----+         +-----+
                 L1/2| PE1 |---------| PE2 |L1/2=20
		     +-----+         +-----+
		        |               |
		        |               |
		     +-----+         +-----+
		     | CE1 |-------- | CE2 |=20
		     +-----+         +-----+

    Though clear and easily implemented, the solution as per 3=20
    has some disvantages, such as:
   =20
   - Routes delivered from one site to another are always treated as=20
     external routes is not desirable, because it will make the "false"
     routes undistinguished from the "real" external routes.
  =20
   - When there exists backdoor link connecting two CEs which belong
     to two different sites of one VPN, the IS-IS intra-area routes will
     be prefered to the VPN-IP routes which has been regarded as=20
     IS-IS external routes. As a result, the traffic will choose
     the direct link between CEs instead of passing through the IP=20
     backbone, which may be not accepted.
    =20
   - Besides, when backdoor exists between PEs, the route loop will=20
     happen on PEs, as both PE1 and PE1 import BGP routes into IS-IS.

4.1  Assumption
    =20
     There exists direct (backdoor) link between two different VPN=20
     sites. Further, there is IS-IS adjacency established over the=20
     backdoor link.
    =20
4.2  Carry IS-IS imformation with BGP Extended communities
    =20
     Per [VPN], BGP is in charge of distributing VPN-IP routes accross
     the VPN backbone. It is very useful of carrying some of the
     important original IS-IS route information by BGP with BGP=20
     extended communities. These "important" original IS-IS route=20
     information are listed as follows:

     -- IS-IS Route Type Extended Communites Attribute.
    =20
        This attribute is required, which is enconded with a two-byte=20
        type field and the type is 0201.  The third byte is encoded=20
        as follows:
       =20
        -- Level type: The first bit. When it is set 0, it indicates=20
           level-1 type route and the value of 1 indicates level-2 type
           route.


Cheng Sheng             Expires October 2003                  [Page 4]

Internet Draft        draft-sheng-isis-bgp-mpls-vpn-00.txt    April 2003



        -- TLV Reachability type: The second bit. When it is set 0, it=20
           indicates that the original IS-IS route is of internal=20
           reachability and the value 1 indicates external reachability
           .
       =20
        -- Metric type: The third bit. When it is set 0, it indicates=20
           the original route is of internal metric type and the value=20
           of 1 indicates external metric type.
       =20
        -- sham-link endpoint address: the fourth bit. When it is set 1
           , it indicates the route is of sham-link endpoint address,=20
           which will be specified in 4.5. By default, this bit should=20
           be set as 0.
    =20
     -- IS-IS System Id Extended Communites Attribute
       =20
        This attribute specifies the system id of the particular VRF=20
        from which this route was exported. It is encoded with a=20
        two-byte type and the type is 0202. The system id is carried=20
        in the rest six bytes. This attribute is optional, which means=20
        it is only necessary to be carried in the sham-link endpoint=20
        address route.
       =20

4.3  Route loop prevention on PEs
    =20
     As per the diagram of 4, when PE1 and PE2 both import bgp routes=20
     into their attached CE sites, the route=20
     loop will happen on both PEs.=20

     To avoid the route loop, it is assumed here that both PE1 and=20
     PE2 act as L1/2 router and there exists level-1 adjacency between=20
     each PE-CE link. The mechanism of how to avoid route loop with=20
     up/down bit in IS-IS level-1 LSP is specified in [ROUTE-LEAKING].
    =20

4.4  IS-IS interaction with BGP on PE

     When PE receives a VPN-IP route, it will convert the route back to
     IS-IS. The creation of IS-IS LSP will be based on IS-IS route=20
     original information carried by BGP extended communities(as per=20
     4.2).=20
    =20
     For example, if the orignal IS-IS route is of level-1 type=20
     /internal reachability/internal metric type, the route will be=20
     re-converted to a level-1 intra-area route with internal metric
     type. Besides, the configuration for route redistribution about
     the IS-IS LSP information is prefered.=20




Cheng Sheng             Expires October 2003                  [Page 5]

Internet Draft        draft-sheng-isis-bgp-mpls-vpn-00.txt    April 2003



4.5  Sham-link Creation
    =20
     As per [OSPF-VPN], sham-link plays a very important role for an=20
     link state IGP such as IS-IS and OSPF in preventing the
     VPN traffic going through backdoor between CEs. Before=20
     establishing the sham-link, each end PE should be assigned an real=20
     shamlink endpoint address which can be a loopback address in VRF=20
     to which the CE belongs.
    =20
     Also, we should ensure that the endpoint address of one side PE is=20
     visible to the PE of the other side. The source and destination=20
     sham-link endpoint address is desigated by configuraiton.
    =20
     For example, as per the diagram in 4, it is necessary to establish=20
     a sham-link between PE1 and PE2. As the first step for PE1, BGP=20
     imports the loopback direct route which is desigated as source=20
     shamlink endpoint address on PE2. Next, the converted BGP route=20
     carries BGP extended communities with sham-link endpoint address=20
     bit(as per 4.2) set and IS-IS System Id Extended Communites=20
     Attribute with the value be equal to the System id of the specific=20
     IS-IS instance on the PE2. When PE1 receives the route, it checks=20
     the sham-link endpoint address bit and gets the IS-IS System Id=20
     the BGP route carry. If the endpoint address PE1 get is similar to=20
     its configured destination sham-link endpoint address, it is=20
     believed that there exists an sham-link from PE1 to PE2. Finally,=20
     PE1 adds one Neighbor reachability TLV(TLV 2) in its=20
     self-originated LSP and floods it out to CE1. Similiar process will =

     happend on PE2.
    =20
     Note: when the PE found the system id of the other end of the =
sham-link=20
     changed, it will flush the old LSP and generate new LSP=20
     according to the new system id get from BGP route. =20
    =20

5. Acknowledgments

   The authors would like to thank yangang, heqian, xuxiaofei, =
weixiugang
   chenjie for their comments on this work.














Cheng Sheng             Expires October 2003                  [Page 6]

Internet Draft        draft-sheng-isis-bgp-mpls-vpn-00.txt    April 2003


6.  References

   [1] ISO 10589, "Intermediate System to Intermediate System Intra-
       Domain Routing Exchange Protocol for use in Conjunction with the
       Protocol for Providing the Connectionless-mode Network Service
       (ISO 8473)".  [Also republished as RFC 1142.]

   [IS-IS] Callon, R., "Use of OSI IS-IS for routing in TCP/IP and dual
       environments", RFC 1195, December 1990.
=20
   [BGP-EXT] "BGP Extended Communities Attribute", =
draft-ietf-idr-bgp-ext-
   communities-05.txt>,  Sangli, S., Tappan, D., Rekhter, Y., May 2002

   [VPN] "BGP/MPLS VPNs", draft-ietf-ppvpn-rfc2547bis-02.txt, Rosen, E.,
   et. al., July, 2002
  =20
   [ROUTE-LEAKING] "Domain-wide Prefix Distribution with Two-Level =
IS-IS",
   RFC 2966, T. Li Request, October 2000=20
  =20
   [OSPF-VPN] "OSPF as the PE/CE Protocol in BGP/MPLS VPNs",=20
   draft-rosen-vpns-ospf-bgp-mpls-06.txt, Eric C. Rosen, April 2003


7.  Author's Addresses:

    Sheng Cheng  =20
    D401 ,HuaWei Bld. No3 Xinxi Rd.
    Shang-Di Information Industry Base,
    Hai-Dian District BeiJing P.R.China
    Zip : 100085
    Email : shengc@huawei.com
   =20
    Liu Yu =20
    A401 ,HuaWei Bld. No.3 Xinxi Rd.
    Shang-Di Information Industry Base,
    Hai-Dian District BeiJing P.R.China
    Zip : 100085
    Email : liu_yu@huawei.com  =20
 =20
    Li Defeng
    D201 ,HuaWei Bld. No.3 Xinxi Rd.
    Shang-Di Information Industry Base,
    Hai-Dian District BeiJing P.R.China
    Zip : 100085
    Email : lidefeng@huawei.com
   =20
    Chen Yunqing
    Email : chenyunqing@vip.sina.com








Cheng Sheng             Expires October 2003                  [Page 7]

Internet Draft        draft-sheng-isis-bgp-mpls-vpn-00.txt    April 2003




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From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: draft-fang-ppvpn-security-framework-01
To: l3vpn@ietf.org
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Authors,

In Section 2 (Security Reference Model) you define the following terms:

1) PPVPN core network
2) PPVPN user
3) PPVPN service
4) Extranets
5) trusted zone

The first four terms (or equivalent terms) are already defined in previous
WG documents. So, you might want to focus on the concept of a trusted zone
or security perimeter.

The following text isn't very polished, but it approximates what I am
driving at:

Trusted zones and security perimeters are central concepts in the security
reference model. A trusted zone can contain networks, users and services. By
definition, entities contained by a trusted zone need not protect themselves
from attack by other members of the same trusted zone.

A logical or physical security perimeter isolates the trusted zone from
entities outside of the trusted zone. Mechanisms implemented on the security
perimeter protect the trusted zone from attack by outside entities.

Figure 1 depicts the concept of a trusted zone withing the PPVPN framework.
Two sites belonging to the same VPN reside in a common trusted zone. In
order to maintain the integrity of this trusted zone, the SP network must
form a security perimeter, isolating interfaces to these VPN sites from
interfaces that support other VPN sites.

The VPN SP network resides within its own trusted zone. A security perimeter
surrounds it, preventing attack from VPN sites.
>

===========================================
Ronald P. Bonica       Ph: 703 886 1681
vBNS Engineering       page: 1 888 268 8021
Ashburn, Va.
===========================================
"If a man marches out of step with his
fellows it may be that he hears the sound
of a different drummer or, perhaps that
he has a poor sense of rhythm."
            -- Henry David Thoreau





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Date: Fri, 25 Jul 2003 11:44:33 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: FW: IETF 57 L3VPN Minutes
To: l3vpn@ietf.org
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Folks,

If I don't hear any objections, I will register these updated minutes.

                                    Ron
==========================================================

>
>
> PPVPN L3 PPVPN
> --------------
>
> July 16, 2003 -- 1300-1500
> IETF 57 -- Vienna, Austria
>  Chairs: Ron Bonica & Ross Callon
>
> Mintes Recorded By: Danny McPherson and Adrian Farrel
>
> -------------------------------------------------------
> Agenda Bashing (no comments)
>
> Alex Zinin: Comments on PPVPN WG Split (to L2VPN & L3VPN)
>
>  o PPVPN WG will be shut down after draft relocation
>  o Thomas Narten will be responsible AD for both L2VPN & L3VPN
>  o Rick Wilder, Loa Andersson & Vach Kompella are L2VPN Chairs
>  o Rick Wilder, Ross Callon & Ron Bonica are L3VPN Chairs
   o Interested participants should subscribe to the new mailing lists
    (l3vpn@ietf.org and l2vpn@ietf.org), since the ppvpn mailing list
    will be closed.
>
> --------------------------------------------------------
> Thomas Narten: Comments from AD, co-AD is Margaret Wasserman
>
>
> --------------------------------------------------------
> Ron Bonica: Charter Stuff
>
>  WG Documents/Chartered:
>   - Requirements & Framework
>   - Security Framework
>   - Three Specific Solutions
>   - MIBs
>   - Alternative Encaps
>
>   o Out of Charter: Multicast & QoS.  Hold off on submitting work
> until in charter.
>
    o WG will specify the requirements and application of existing
      protocols for support of L3 VPNs. The WG will not specify
      protocols.
>
>
> --------------------------------------------------------
> Ross Callon:  Document Status
>
>  o L3VPN Framework has been approved by IESG for publication
>  o L3 Service Requirements passed WG LC but terminology issues
> and alignment in progress
>  o Generic Requirements updated to resolve IESG comments, letter
> on IESG comment resolution on way to IESG
>
>  o Work on Security Framework needs to happen
>  o IESG would like security of each approach, work ongoing
>
>  o Applicability statements.
>   - VR: Recent Updates
>   - BGP IP VPNS:
>   - CE/IPSEC
>
>  o Issues on Applicability Guidlines?
>
>   - What is long-term disposition?
>   - Should there be seperate L2 & L3 documents or should they
> stay together?
>
>  o MIBs & Network Management
>
>   - OAM disucssion to follow
>   - Textual Conventions: Stable
>   - MPLS/BGP MIB: Stable
>   - VR MIB: Recent Update for Clarity
>   - Requirements for MPLS MIBs: comments to authors of different MIBs
>   - CE MIB: TBD.
>
>  o Other WG Documents
>
>   - 2547 for IPv6: Stable
>   - PE-PE IPSEC for 2547: Stable
>   - PE-PE GRE or IP for 2547: Stable
>   - BGP as Auto-Discovery: Stable
>
>  - OSPF as PE/CE re-issued in June
   - CE-to-CE member verification: Stable. However, alternate has been
     proposed. Work is needed to compare them.
>
>
> --------------------------------------------------------
> Luyuan Fang: PPVPN Security Framework Document
>
>  o Motivation: Security FW needs to be defined to progress other WG items
>  o Initiated in Atlanta @IETF 55
>  o There are well-defined user requirements for VPN security
>  o Need to provide secure VPN services to users, must protect
> network & subscribers
>  o Defined templates to analyze security properties of different
> VPN solutions
>
>
>  Status:
>   - Started in ATL @IETF55
>   - Presented first work in San Francisco
>   - Collecting feedback on mailing list
>   - -01 draft currently published, close to final form
>   - Filled in "Section 8"
>
>  Outline:
>   1) Intro
>   2) PPVPN Security Reference Model
>   3) Security Threats
>   4) Defensive Techniques
>   5) Monitoring, Detection & Reporting of Security
>   6) User Security Requirements
>   7) Provider Security Requirements
>   8) Templates
>
>   - Not meant to address every requirement
>   - Every technology need not satisfy every requirement
>   - Not in scope of draft to address individual technologies
>
>   - Section 8 on templates: to assit in evaluating and summarizing
>
>   - Would like feedback on document!
>   - Ask to move draft to WG document
>   - Get feedback from Security Advisor
>
>
> Ron Bonica:
        - The document is important, and is in very good shape.
        - Propose adopt as WG document
        - Would like to ask people to send comments to the l3vpn working
           group within two weeks
        - Luyuan to collect feed back from email list and other sources
        - Luyuan will respin draft in two weeks or so (after first two
weeks)
        - Propose that we then more to WG last call>

> Paul Hoffman:  Should section 8 include completed templates, or only the
  outline for templates. [Reply: The timeframe implies just the
  outline for templates -- he was okay with this.]  Need to be
> clear this and other documents must be read to get all information that's
> needed.
>
> Ron Bonica:  We'll adopt as WG document and see new spin in a few weeks.
> Wait on new revision of document and then do WG LC.
>
> Chair: Asked for show of hands for support of document, lots of hands.
> No one opposed.
> --------------------------------------------------------
>
> Thomas Nadeau: Proposed PPVPN Management Framework
>
>  o Starting point was draft-yacine-ppvpn-mgt-framework00.txt
>  o Cleaned up and aligned since last meeting to align with goals
>    and requirements of WG.
>
>  o Need to add overall MIB architecture and view much like MPLS
>
>  o Need to talk more about customer managment
>  o Service OAM (OAM for VPN and interactions with VPN substrate)
>  o Consider renaming to Framework for VPN OAM
>  o Get more WG input
>
>  o Question: Consider as WG draft (may be charter issues)
>

  Ross Callon: It is not clear whether this is in our charter. Alex advises
that it
  is okay for us as a working group to decide whether we would like to
accept
  this as a working group document. The chairs can then check with the ADs.
  If a charter update is needed then we can ask the IESG post facto for a
charter
  update.

> Chair: Asked for show of hands for support of documents, lots of hands
> go up.  No one opposed.
>
>
> --------------------------------------------------------
> Rahul Aggarwal:
>
>  o Mechanism for signaling PE tunnel encap capabilities.
>
>  Motivations:
>
>  o Blackhole Avoidance
>  o Co-existing MPLS & IP encap
>
>  BGP Tunnel Capability SAFI
>  LDP Tunnel Encap Capabilities (may not be necessary per BGP)
>  IANA Considerations
>
> Request to be a WG document in L3 VPN WG.
>
> AD (Alex Zinin): If L3 VPN supports IDR needs to do technical
> review.  Doesn't believe that document can become a WG document
> per BGP changes.  Needs to verify if this is real problem, then
> choice of moving whole draft to IDR or splitting document into
> separate drafts.
>
> Rahul: What is procedure for extensions?
>
> (AD) Alex Zinin: Protocol-specific procedures go to protocol WG.
>
> Rahul Aggarwal: What is procedure for extensions?
>
> (AD) Thomas Narten: If this is real problem then qualify on mailing list
> and then we'll go from there.
>
> How many people have read the document?  Lots of hands go up.
> How many people think this is a valid problem? Lots of hands go up.
> How many people think work should not be done?  No hands.
>
> --------------------------------------------------------
> Pedro Marques: Constrained VPN Route Distribution
>
> Problem: VPN Route Distribution Layer must carry routes for all VPNs
> Goal: Reduce number of routes carried in all RRs by taking advantage
>       of locality
>
> Ross Callon: Is this a problem the WG should be concerned about?
>
> Who's read the document?  Modest number.
> Who thinks we should be concerned about: modest number
> Should this not become a WG document: 1 hand.
>

  Yakov: BGP already has protocol extensions. There are lots of
  interoperable implementations. This spec uses what already
  exists in BGP.

>
> Pedro: Does not modify existing standard to BGP, but AD/IESG
>
> AD (Thomas Narten): Does this change bits or protocol?
>
> Pedro: No, introduces NEW bits!
>
> Dave Ward: Disagrees, thanks it changes fundamental BGP behavior.
>
> AD (Thomas Narten): Would like to hear from folks who said no to
> the problem, why?
>
> WHO?: Problem is that it needs to be done in IDR, not L3 VPN
>
> Pedro: Just here to ask WG opinion of is problem is real and is
>  this is a valid.
>
> AD (Alex Zinin): Will show up in IDR, concentrate on solution
> properties here.
>
> George Swallow: Scalability is an issue and always worth tackling.
>  As long as proposal is sound in IDR ir should be OK here.
>
> Luyuan Fang: This is coming from a real problem. The solution proposed
>     by this draft will be very helpful in our Inter-AS VPN implementation.
>
> --------------------------------------------------------
> Pedro Marques: Use IBGP as PE-CE Protocol
>
  Ron Bonica: Does the CE device peer with you using the carriers's
  AS number? If so, then this would seem to have a problem given
  that the carrier would be peering with multiple VPNs.

  Pedro: The CE uses its own AS number. Therefore in this case the
  PE would also use the private network's AS number for exchanging
  I-BGP with CEs from that particular private network.
>
> Joel Halpren: Looks like useful tool.  IDR should build as
> general tool and
>  use it for other stuff.  Else IDR says it's crazy and we shouldn't do it.
>
> Pedro: Only relates to 2547, belongs in PPVPN.
>
> WHO?: Why would we run IBGP with a domain we don't control?  How do you
>  safeguard IGP/IBGP with this?
>
> Pedro:  No assumption IGP is being run.
>
> Ross Callon: Issue is whether this is useful, where work falls is
>   subsequent.
>
> (AD) Alex Zinin: Agress with Ross.
>
>
> --------------------------------------------------------
> Li Defeng: IS-IS as PE-CE Protocol in BGP/MPLS VPN
>
> Motivation: In 2547 lots of PE/CE protocols.  IS-IS not
>  defined.
>  - In OSPF case lots of drafts
>  - No IS-IS draft
>
> Would like to progress as WG document
>
> How many have read this?  (not many hands)
>
> Difeng: China Telecom Requests that it be implemented.
>
>Question: Should we only suppory wide-metrics?
> DifengThis draft supports both narrow-metric and wide-metric,this is
clarified in the attached slides
>
> Question: Does this support IS-IS Admin tags?
> Defeng: This draft doesn't support IS-IS Admin tags for the time being,but
in the following version,it can support.
>
> Danny McPherson: Is this being defined for sake of defining it
> (i.e., because other protocols have already been defined) or is
> this really demand driven?  Are customers really running IS-IS
> and considering this for CE-PE protocol?
>
> Difeng: This draft is defined under the requirement of the customer(China
Telecom),not
> defined for the sake of defining it.We hope this draft can be reviewed by
some experts,
> and progress to an informational RFC.
>
> Request for show of hands for interest in pursuing this work: None
>
> Need to take it to the list.
>
> --------------------------------------------------------
> Gargi: Tunnel Encap signaling using Tunnel SAFI
>
> New IPv4-Tunnel SAFI
>
> Comment: Why do we need this?  Also, how do you deal with
> >misconfiguration?
>
> Gargi: SAFI signaled to all other PEs in the network.
>
> Comment: Same as Rahul's draft/preso.
>
> Danny McPherson: These are the same problem, two document
> authors should work together.
>
> Rahul/Others: Draft authors will work together.
>





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Subject: I-D ACTION:draft-ietf-l3vpn-bgpvpn-auto-00.txt
Date: Fri, 25 Jul 2003 15:28:11 -0400
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Layer 3 Virtual Private Networks Working Group of the IETF.

	Title		: Using BGP as an Auto-Discovery Mechanism for 
                          Provider-provisioned VPNs
	Author(s)	: H. Ould-Brahim et al.
	Filename	: draft-ietf-l3vpn-bgpvpn-auto-00.txt
	Pages		: 12
	Date		: 2003-7-25
	
In any Provider Provisioned-Based VPN (PPVPN) scheme, the Provider 
Edge (PE) devices attached to a common VPN must exchange certain 
information as a prerequisite to establish VPN-specific 
connectivity. The purpose of this draft is to define a BGP based 
auto-discovery mechanism for both layer-2 VPN architectures and 
layer-3 VPNs ([VPN-VR]). This mechanism is based on the approach 
used by [RFC2547-bis] for distributing VPN routing information 
within the service provider(s). Each VPN scheme uses the mechanism 
to automatically discover the information needed by that particular 
scheme.

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From exim@www1.ietf.org  Sat Jul 26 22:00:35 2003
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Date: Sat, 26 Jul 2003 21:52:50 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: draft-fang-ppvpn-security-framework-01
To: l3vpn@ietf.org
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Authors,

Two more comments on the draft follow:

1) In Section 3, as you enumerate threat classes, you include "traffic
pattern analysis". You expand upon the concept of traffic pattern analysis
in section 3.1.4. I wonder if this shouldn't be identified as a second order
threat, as its consequences are not so severe as the other threats. Also, it
is very difficult to protect against.

2) In Section 3, you identify the following threat source:

- Persons within the organization which is the PPVPN user with respect to a
particular PPVPN

Does the SP need to protect against threats from this source, as the source
and target are contained by the same trusted zone?


                          Ron
                          /individual contributor

===========================================
Ronald P. Bonica       Ph: 703 886 1681
vBNS Engineering       page: 1 888 268 8021
Ashburn, Va.
===========================================
"If a man marches out of step with his
fellows it may be that he hears the sound
of a different drummer or, perhaps that
he has a poor sense of rhythm."
            -- Henry David Thoreau





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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Layer 3 Virtual Private Networks Working Group of the IETF.

	Title		: Applicability Statement for BGP/MPLS IP VPNs
	Author(s)	: E. Rosen
	Filename	: draft-ietf-l3vpn-as2547-01.txt
	Pages		: 24
	Date		: 2003-7-28
	
This document provides an Applicability Statement for the VPN
solution described in [2547bis] and other documents listed in the
References section.

A URL for this Internet-Draft is:
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From exim@www1.ietf.org  Mon Jul 28 12:09:36 2003
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Reply-To: <vach.kompella@alcatel.com>
From: "Vach Kompella" <vach.kompella@alcatel.com>
To: <l3vpn@ietf.org>
Subject: Minor modification to 2547 MIB
Date: Mon, 28 Jul 2003 09:10:05 -0700
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All,

I asked this of Tom, and he was not opposed to it, but suggested, since the MIB
is close to done, to ask whether the WG was in favor or not.

It's about the CIDR table.  The protocol object contains a the same list of
protocols as the standard IP CIDR table.

There is thus no way to differentiate a route that is received via BGP from a
customer vs. another route that is received via MPBGP.  I think it would be
useful to be able to distinguish the routes received directly over a BGP session
with a CE over those received from another PE.

Do others think this is useful enought that we add a new enum value, say
bgp-vpn(17), to the mplsVpnVrfRouteProto object?

Vach Kompella
Alcatel
vach.kompella@alcatel.com
650-237-5152






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Subject: Re: RFC2547bis doubt 
In-reply-to: Your message of Mon, 28 Jul 2003 15:37:02 +0530.
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(Switched mailing lists.) 

> Can IP address of CE routers, over which they establish BGP session with PE,
> overlap? 

> Means two CEs, say CE1 (in VPN A) and CE2 (in VPN B), having same IP
> addresses, can have bgp session to same PE. 

Certainly the architecture allows  this.  It's an implementation issue, your
BGP implementation just has to be able  to cope with it.  I know of at least
one implementation which does allow this. 










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From: "Naidu, Venkata" <Venkata.Naidu@Marconi.com>
To: "'erosen@cisco.com'" <erosen@cisco.com>, lakshmirm@future.futsoft.com
Cc: l3vpn@ietf.org
Subject: RE: RFC2547bis doubt 
Date: Mon, 28 Jul 2003 18:02:08 -0400
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-> > Can IP address of CE routers, over which they establish 
-> BGP session with PE,
-> > overlap? 
-> 
-> > Means two CEs, say CE1 (in VPN A) and CE2 (in VPN B), 
-> having same IP
-> > addresses, can have bgp session to same PE. 
-> 
-> Certainly the architecture allows  this.  It's an 
-> implementation issue, your
-> BGP implementation just has to be able  to cope with it.  I 
-> know of at least one implementation which does allow this. 

  More precisely, your IP stack has to support this. This is
  nothing to do with BGP. To complicate, PE interface addresses 
  over different VRFs (in the above case, to CE1 and CE2) can 
  also overlap. So, in some cases, "CE1 to PE" and "CE2 to PE" 
  IP datagrams can look very similar (including the TCP header 
  ephemeral port numbers, IP source and destination addresses etc). 
  If possible, distinguish the packets at the port (interface) 
  of entry at PE.

Venkata.




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Date: Tue, 29 Jul 2003 15:01:11 -0700
To: l3vpn@ietf.org
From: Paul Hoffman / VPNC <paul.hoffman@vpnc.org>
Subject: Re: draft-fang-ppvpn-security-framework-01
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At 9:12 PM -0400 7/24/03, Ron Bonica wrote:
>Authors,
>
>In Section 2 (Security Reference Model) you define the following terms:
>
>1) PPVPN core network
>2) PPVPN user
>3) PPVPN service
>4) Extranets
>5) trusted zone
>
>The first four terms (or equivalent terms) are already defined in previous
>WG documents. So, you might want to focus on the concept of a trusted zone
>or security perimeter.

raft-ietf-l3vpn-framework uses different terms than the security 
framework document. For example, the l3vpn framework document doesn't 
define "core network", but this is an important and heavily-used 
concept in the security framework document.

It might be OK to leave the current definitions in the security 
framework document. Otherwise, it will take a great deal of work to 
harmonize the two sets of definitions.

--Paul Hoffman, Director
--VPN Consortium




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Date: Tue, 29 Jul 2003 21:00:20 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: RE: draft-fang-ppvpn-security-framework-01
In-reply-to: <p05210638bb4c9e56b5b0@[63.202.92.152]>
To: Paul Hoffman / VPNC <paul.hoffman@vpnc.org>, l3vpn@ietf.org
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Paul

Doesn't draft-ietf-l3vpn-framework use the term "SP Network"? Isn't that the
same as the "core network"?

                                        Ron

> -----Original Message-----
> From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org]On Behalf Of
> Paul Hoffman / VPNC
> Sent: Tuesday, July 29, 2003 6:01 PM
> To: l3vpn@ietf.org
> Subject: Re: draft-fang-ppvpn-security-framework-01
>
>
> At 9:12 PM -0400 7/24/03, Ron Bonica wrote:
> >Authors,
> >
> >In Section 2 (Security Reference Model) you define the following terms:
> >
> >1) PPVPN core network
> >2) PPVPN user
> >3) PPVPN service
> >4) Extranets
> >5) trusted zone
> >
> >The first four terms (or equivalent terms) are already defined
> in previous
> >WG documents. So, you might want to focus on the concept of a
> trusted zone
> >or security perimeter.
>
> raft-ietf-l3vpn-framework uses different terms than the security
> framework document. For example, the l3vpn framework document doesn't
> define "core network", but this is an important and heavily-used
> concept in the security framework document.
>
> It might be OK to leave the current definitions in the security
> framework document. Otherwise, it will take a great deal of work to
> harmonize the two sets of definitions.
>
> --Paul Hoffman, Director
> --VPN Consortium
>





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Date: Tue, 29 Jul 2003 20:44:44 -0700
To: Ron Bonica <Ronald.P.Bonica@mci.com>, l3vpn@ietf.org
From: Paul Hoffman / VPNC <paul.hoffman@vpnc.org>
Subject: RE: draft-fang-ppvpn-security-framework-01
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At 9:00 PM -0400 7/29/03, Ron Bonica wrote:
>Paul
>
>Doesn't draft-ietf-l3vpn-framework use the term "SP Network"? Isn't that the
>same as the "core network"?

It doesn't appear to be. In the l3vpn-framework document, it appears 
that the "SP Network" include the PE boxes, but in the 
security-framework document, the "core network" does not. That's a 
pretty significant difference when you are trying to delineate where 
various security services happen.

Of course, I could be reading one or both of the documents wrong, 
particularly because the l3vpn-framework document doesn't directly 
define "SP network": you have to infer it from the ASCII art.

--Paul Hoffman, Director
--VPN Consortium




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Date: Wed, 30 Jul 2003 10:09:27 +0100 (BST)
From: =?iso-8859-1?q?John=20Smith?= <jsmith4112003@yahoo.co.uk>
Subject: Advertising Routes to a PE
To: l3vpn@ietf.org
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Hi,

I have a conceptual doubt.

I have two VRFs A and B defined on a PE router. Both of them have overlapping Route
Targets.

My basic config goes something like this.

!
ip vrf A
 rd 1:1
 route-target both 100:100
!
ip vrf B
 rd 2:2
 route-target both 100:100
!

Now i learn a route (say 10.0.0.0/8) from VRF A. I redistribute it into VRF B too as they
have overlapping RTs.

Now when this PE router peers up with another PE peer it will announce 1:1::10.0.0.0/8
along with the associated Route Targets. Should it also advertise 2:2::10.0.0.0/8 to the
remote PE router?

I have a router from one major vendor which is not doing this. I see it only advertising
1:1::10.0.0.0/8

Is this correct?

Regards,
Smith





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Yes this is correct :). Advertising of locally imported routes should
not be allowed.

R.

> John Smith wrote:
> 
> Hi,
> 
> I have a conceptual doubt.
> 
> I have two VRFs A and B defined on a PE router. Both of them have overlapping Route
> Targets.
> 
> My basic config goes something like this.
> 
> !
> ip vrf A
>  rd 1:1
>  route-target both 100:100
> !
> ip vrf B
>  rd 2:2
>  route-target both 100:100
> !
> 
> Now i learn a route (say 10.0.0.0/8) from VRF A. I redistribute it into VRF B too as they
> have overlapping RTs.
> 
> Now when this PE router peers up with another PE peer it will announce 1:1::10.0.0.0/8
> along with the associated Route Targets. Should it also advertise 2:2::10.0.0.0/8 to the
> remote PE router?
> 
> I have a router from one major vendor which is not doing this. I see it only advertising
> 1:1::10.0.0.0/8
> 
> Is this correct?
> 
> Regards,
> Smith
> 
> ________________________________________________________________________
> Want to chat instantly with your online friends?  Get the FREE Yahoo!
> Messenger http://uk.messenger.yahoo.com/




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Subject: RE: Re: Advertising Routes to a PE
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I think that below configuration works even if route 2:2::10.0.0.0/8 is=20
not advertised since export RTs in the VRF A and B are the same.

But what if VRF B has different export RTs than VRF A ?=20
Then I think it is necessary to advertise route 2:2::10.0.0.0/8 as well.

Conceptually I think that both routes should be advertised.=20
What is reason not to do so ?

Best Regards,
Marko Kulmala

> -----Original Message-----
> From: raszuk@cisco.com [mailto:raszuk@cisco.com]
> Sent: 30. hein=E4kuuta 2003 12:35
> To: jsmith4112003@yahoo.co.uk
> Cc: raszuk@cisco.com; l3vpn@ietf.org
> Subject: Re: Advertising Routes to a PE
>=20
>=20
>=20
> Yes this is correct :). Advertising of locally imported routes should
> not be allowed.
>=20
> R.
>=20
> > John Smith wrote:
> >=20
> > Hi,
> >=20
> > I have a conceptual doubt.
> >=20
> > I have two VRFs A and B defined on a PE router. Both of=20
> them have overlapping Route
> > Targets.
> >=20
> > My basic config goes something like this.
> >=20
> > !
> > ip vrf A
> >  rd 1:1
> >  route-target both 100:100
> > !
> > ip vrf B
> >  rd 2:2
> >  route-target both 100:100
> > !
> >=20
> > Now i learn a route (say 10.0.0.0/8) from VRF A. I=20
> redistribute it into VRF B too as they
> > have overlapping RTs.
> >=20
> > Now when this PE router peers up with another PE peer it=20
> will announce 1:1::10.0.0.0/8
> > along with the associated Route Targets. Should it also=20
> advertise 2:2::10.0.0.0/8 to the
> > remote PE router?
> >=20
> > I have a router from one major vendor which is not doing=20
> this. I see it only advertising
> > 1:1::10.0.0.0/8
> >=20
> > Is this correct?
> >=20
> > Regards,
> > Smith
> >=20
> >=20
> ______________________________________________________________
> __________
> > Want to chat instantly with your online friends?  Get the=20
> FREE Yahoo!
> > Messenger http://uk.messenger.yahoo.com/
>=20
>=20

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
The information contained in this message may be privileged=20
and confidential and protected from disclosure.  If the=20
reader of this message is not the intended recipient, or an=20
employee or agent responsible for delivering this message to=20
the intended recipient, you are hereby notified that any=20
reproduction, dissemination or distribution of this=20
communication is strictly prohibited. If you have received=20
this communication in error, please notify us immediately by=20
replying to the message and deleting it from your computer.

Thank you.
Tellabs
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D




From exim@www1.ietf.org  Wed Jul 30 08:59:28 2003
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Date: Wed, 30 Jul 2003 08:53:50 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: RE: draft-fang-ppvpn-security-framework-01
In-reply-to: <p0521063cbb4cef019dbd@[63.202.92.152]>
To: Paul Hoffman / VPNC <paul.hoffman@vpnc.org>, l3vpn@ietf.org
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Paul,

You may be right. However, I would not have infered that meaning from the
following definition
which was lifted from draft-fang-ppvpn-security-framework

   "A PPVPN core network is defined here as the central network
   infrastructure over which PPVPN services are delivered. All network
   elements in the core are under the operational control of one or
   more PPVPN service providers. PPVPN services can also be delivered
   over the Internet, in which case the Internet forms a logical part
   of the PPVPN core."

If that was the meaning of this paragraph, it should include some specific
verbage excluding PE routers. Then the term becomes significantly different
from the term "SP network".

                                           Ron
                                           /individual contributor

> -----Original Message-----
> From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org]On Behalf Of
> Paul Hoffman / VPNC
> Sent: Tuesday, July 29, 2003 11:45 PM
> To: Ron Bonica; l3vpn@ietf.org
> Subject: RE: draft-fang-ppvpn-security-framework-01
>
>
> At 9:00 PM -0400 7/29/03, Ron Bonica wrote:
> >Paul
> >
> >Doesn't draft-ietf-l3vpn-framework use the term "SP Network"?
> Isn't that the
> >same as the "core network"?
>
> It doesn't appear to be. In the l3vpn-framework document, it appears
> that the "SP Network" include the PE boxes, but in the
> security-framework document, the "core network" does not. That's a
> pretty significant difference when you are trying to delineate where
> various security services happen.
>
> Of course, I could be reading one or both of the documents wrong,
> particularly because the l3vpn-framework document doesn't directly
> define "SP network": you have to infer it from the ASCII art.
>
> --Paul Hoffman, Director
> --VPN Consortium
>





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Date: Wed, 30 Jul 2003 09:35:56 -0400
To: marko.kulmala@tellabs.com
From: Dan Tappan <tappan@cisco.com>
Subject: RE: Re: Advertising Routes to a PE
Cc: jsmith4112003@yahoo.co.uk, raszuk@cisco.com, l3vpn@ietf.org
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At 03:46 PM 7/30/2003 +0300, marko.kulmala@tellabs.com wrote:
>I think that below configuration works even if route 2:2::10.0.0.0/8 is
>not advertised since export RTs in the VRF A and B are the same.
>
>But what if VRF B has different export RTs than VRF A ?

In the scenario you've described the route in VRF B is not exported, so=20
export RTs do not apply.

In this context 'exported' means "redistributed from a VRF RIB into BGP,=20
for purposes of producing a vpnv4 route for advertisement to other PEs".=20
So, as you can see, the route in VRF B is _imported_ (installed into the=20
proper RIB by BGP based on the RTs associated with the route) but there is=
=20
no reason to export it.

At an architectural level, the BGP advertisement needs to be based on which=
=20
vpnv4 routes are produced on a given PE, which is a separate issue from=20
what VRF RIB a route is installed into. The vpnv4 route is based on the RIB=
=20
entry which exported the route.  (the fact that some implementations=20
internally generate a vpnv4 route for VRF B, for purposes of book-keeping,=
=20
is separate from the 2547 architecture).

If you have a need to control the RT set which is associated with a vpnv4=20
route, then there are other mechanisms to do so.

If one followed your suggested model consistently then every route received=
=20
by PE and imported into multiple VRFs would result in the re-advertisement=
=20
of multiple vpnv4 routes. This would both be a violation of iBGP=20
procedures, and would result in an explosion of routing information.

>Then I think it is necessary to advertise route 2:2::10.0.0.0/8 as well.
>
>Conceptually I think that both routes should be advertised.
>What is reason not to do so ?
>
>Best Regards,
>Marko Kulmala
>
> > -----Original Message-----
> > From: raszuk@cisco.com [mailto:raszuk@cisco.com]
> > Sent: 30. hein=E4kuuta 2003 12:35
> > To: jsmith4112003@yahoo.co.uk
> > Cc: raszuk@cisco.com; l3vpn@ietf.org
> > Subject: Re: Advertising Routes to a PE
> >
> >
> >
> > Yes this is correct :). Advertising of locally imported routes should
> > not be allowed.
> >
> > R.
> >
> > > John Smith wrote:
> > >
> > > Hi,
> > >
> > > I have a conceptual doubt.
> > >
> > > I have two VRFs A and B defined on a PE router. Both of
> > them have overlapping Route
> > > Targets.
> > >
> > > My basic config goes something like this.
> > >
> > > !
> > > ip vrf A
> > >  rd 1:1
> > >  route-target both 100:100
> > > !
> > > ip vrf B
> > >  rd 2:2
> > >  route-target both 100:100
> > > !
> > >
> > > Now i learn a route (say 10.0.0.0/8) from VRF A. I
> > redistribute it into VRF B too as they
> > > have overlapping RTs.
> > >
> > > Now when this PE router peers up with another PE peer it
> > will announce 1:1::10.0.0.0/8
> > > along with the associated Route Targets. Should it also
> > advertise 2:2::10.0.0.0/8 to the
> > > remote PE router?
> > >
> > > I have a router from one major vendor which is not doing
> > this. I see it only advertising
> > > 1:1::10.0.0.0/8
> > >
> > > Is this correct?
> > >
> > > Regards,
> > > Smith
> > >
> > >
> > ______________________________________________________________
> > __________
> > > Want to chat instantly with your online friends?  Get the
> > FREE Yahoo!
> > > Messenger http://uk.messenger.yahoo.com/
> >
> >
>
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>The information contained in this message may be privileged
>and confidential and protected from disclosure.  If the
>reader of this message is not the intended recipient, or an
>employee or agent responsible for delivering this message to
>the intended recipient, you are hereby notified that any
>reproduction, dissemination or distribution of this
>communication is strictly prohibited. If you have received
>this communication in error, please notify us immediately by
>replying to the message and deleting it from your computer.
>
>Thank you.
>Tellabs
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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Subject: RE: Re: Advertising Routes to a PE
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Thanks for explaining that.

You wrote:  "This would both be a violation of iBGP procedures ..."

So, one could think so that the route distribution in a single PE is=20
kind of logical MP-iBGP session, right ? and that is why it is not=20
distributed further by MP-iBGP to other PEs.=20
But the route is distributed to the CEs that are associated to VRF B=20
(via eBGP or OSPF..).

-Marko


> -----Original Message-----
> From: tappan@cisco.com [mailto:tappan@cisco.com]
> Sent: 30. hein=E4kuuta 2003 16:36
> To: Kulmala, Marko
> Cc: jsmith4112003@yahoo.co.uk; raszuk@cisco.com; l3vpn@ietf.org
> Subject: RE: Re: Advertising Routes to a PE
>=20
>=20
> At 03:46 PM 7/30/2003 +0300, marko.kulmala@tellabs.com wrote:
> >I think that below configuration works even if route=20
> 2:2::10.0.0.0/8 is
> >not advertised since export RTs in the VRF A and B are the same.
> >
> >But what if VRF B has different export RTs than VRF A ?
>=20
> In the scenario you've described the route in VRF B is not=20
> exported, so=20
> export RTs do not apply.
>=20
> In this context 'exported' means "redistributed from a VRF=20
> RIB into BGP,=20
> for purposes of producing a vpnv4 route for advertisement to=20
> other PEs".=20
> So, as you can see, the route in VRF B is _imported_=20
> (installed into the=20
> proper RIB by BGP based on the RTs associated with the route)=20
> but there is=20
> no reason to export it.
>=20
> At an architectural level, the BGP advertisement needs to be=20
> based on which=20
> vpnv4 routes are produced on a given PE, which is a separate=20
> issue from=20
> what VRF RIB a route is installed into. The vpnv4 route is=20
> based on the RIB=20
> entry which exported the route.  (the fact that some implementations=20
> internally generate a vpnv4 route for VRF B, for purposes of=20
> book-keeping,=20
> is separate from the 2547 architecture).
>=20
> If you have a need to control the RT set which is associated=20
> with a vpnv4=20
> route, then there are other mechanisms to do so.
>=20
> If one followed your suggested model consistently then every=20
> route received=20
> by PE and imported into multiple VRFs would result in the=20
> re-advertisement=20
> of multiple vpnv4 routes. This would both be a violation of iBGP=20
> procedures, and would result in an explosion of routing information.
>=20
> >Then I think it is necessary to advertise route=20
> 2:2::10.0.0.0/8 as well.
> >
> >Conceptually I think that both routes should be advertised.
> >What is reason not to do so ?
> >
> >Best Regards,
> >Marko Kulmala
> >
> > > -----Original Message-----
> > > From: raszuk@cisco.com [mailto:raszuk@cisco.com]
> > > Sent: 30. hein=E4kuuta 2003 12:35
> > > To: jsmith4112003@yahoo.co.uk
> > > Cc: raszuk@cisco.com; l3vpn@ietf.org
> > > Subject: Re: Advertising Routes to a PE
> > >
> > >
> > >
> > > Yes this is correct :). Advertising of locally imported=20
> routes should
> > > not be allowed.
> > >
> > > R.
> > >
> > > > John Smith wrote:
> > > >
> > > > Hi,
> > > >
> > > > I have a conceptual doubt.
> > > >
> > > > I have two VRFs A and B defined on a PE router. Both of
> > > them have overlapping Route
> > > > Targets.
> > > >
> > > > My basic config goes something like this.
> > > >
> > > > !
> > > > ip vrf A
> > > >  rd 1:1
> > > >  route-target both 100:100
> > > > !
> > > > ip vrf B
> > > >  rd 2:2
> > > >  route-target both 100:100
> > > > !
> > > >
> > > > Now i learn a route (say 10.0.0.0/8) from VRF A. I
> > > redistribute it into VRF B too as they
> > > > have overlapping RTs.
> > > >
> > > > Now when this PE router peers up with another PE peer it
> > > will announce 1:1::10.0.0.0/8
> > > > along with the associated Route Targets. Should it also
> > > advertise 2:2::10.0.0.0/8 to the
> > > > remote PE router?
> > > >
> > > > I have a router from one major vendor which is not doing
> > > this. I see it only advertising
> > > > 1:1::10.0.0.0/8
> > > >
> > > > Is this correct?
> > > >
> > > > Regards,
> > > > Smith
> > > >
> > > >
> > > ______________________________________________________________
> > > __________
> > > > Want to chat instantly with your online friends?  Get the
> > > FREE Yahoo!
> > > > Messenger http://uk.messenger.yahoo.com/
> > >
> > >
> >
> >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> >The information contained in this message may be privileged
> >and confidential and protected from disclosure.  If the
> >reader of this message is not the intended recipient, or an
> >employee or agent responsible for delivering this message to
> >the intended recipient, you are hereby notified that any
> >reproduction, dissemination or distribution of this
> >communication is strictly prohibited. If you have received
> >this communication in error, please notify us immediately by
> >replying to the message and deleting it from your computer.
> >
> >Thank you.
> >Tellabs
> >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
>=20
>=20

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
The information contained in this message may be privileged=20
and confidential and protected from disclosure.  If the=20
reader of this message is not the intended recipient, or an=20
employee or agent responsible for delivering this message to=20
the intended recipient, you are hereby notified that any=20
reproduction, dissemination or distribution of this=20
communication is strictly prohibited. If you have received=20
this communication in error, please notify us immediately by=20
replying to the message and deleting it from your computer.

Thank you.
Tellabs
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D




From exim@www1.ietf.org  Wed Jul 30 10:20:30 2003
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Date: Wed, 30 Jul 2003 10:14:34 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: RE: WG Focus Item
In-reply-to: <DKEJJCOCJMHEFFNMLKMPMEOLJNAA.Ronald.P.Bonica@mci.com>
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Folks,

I haven't seen many comments regarding draft-fang-ppvpn-security-framework
on the list. In fact,
the silence is deafening. Could I ask for a few volunteers to critically
review this draft?
Please email the list if you are willing to volunteer.

                                     Ron


> -----Original Message-----
> From: Ron Bonica [mailto:Ronald.P.Bonica@mci.com]
> Sent: Tuesday, July 22, 2003 9:56 AM
> To: l3vpn@ietf.org
> Subject: WG Focus Item
>
>
> Folks,
>
> During the next two weeks, please dedicate some time to reviewing
> draft-fang-ppvpn-security-framework-01. Send comments to this
> mailing list. When comments have been received, the authors will
> spin a new version and we will have a WG last call.
>
> We need to send this draft to the ADs/IESG fairly quickly a)
> because it is important and b) because so many other drafts
> depend upon it.
>
> ===========================================
> Ronald P. Bonica       Ph: 703 886 1681
> vBNS Engineering       page: 1 888 268 8021
> Ashburn, Va.
> ===========================================
> "If a man marches out of step with his
> fellows it may be that he hears the sound
> of a different drummer or, perhaps that
> he has a poor sense of rhythm."
>             -- Henry David Thoreau





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Date: Wed, 30 Jul 2003 10:17:18 -0400
To: marko.kulmala@tellabs.com
From: Dan Tappan <tappan@cisco.com>
Subject: RE: Re: Advertising Routes to a PE
Cc: jsmith4112003@yahoo.co.uk, l3vpn@ietf.org, raszuk@cisco.com
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At 05:02 PM 7/30/2003 +0300, marko.kulmala@tellabs.com wrote:
>Thanks for explaining that.
>
>You wrote:  "This would both be a violation of iBGP procedures ..."
>
>So, one could think so that the route distribution in a single PE is
>kind of logical MP-iBGP session, right ?

Yes, that is one consistent model.

>and that is why it is not
>distributed further by MP-iBGP to other PEs.
>But the route is distributed to the CEs that are associated to VRF B
>(via eBGP or OSPF..).

Correct.

>-Marko
>
>
> > -----Original Message-----
> > From: tappan@cisco.com [mailto:tappan@cisco.com]
> > Sent: 30. hein=E4kuuta 2003 16:36
> > To: Kulmala, Marko
> > Cc: jsmith4112003@yahoo.co.uk; raszuk@cisco.com; l3vpn@ietf.org
> > Subject: RE: Re: Advertising Routes to a PE
> >
> >
> > At 03:46 PM 7/30/2003 +0300, marko.kulmala@tellabs.com wrote:
> > >I think that below configuration works even if route
> > 2:2::10.0.0.0/8 is
> > >not advertised since export RTs in the VRF A and B are the same.
> > >
> > >But what if VRF B has different export RTs than VRF A ?
> >
> > In the scenario you've described the route in VRF B is not
> > exported, so
> > export RTs do not apply.
> >
> > In this context 'exported' means "redistributed from a VRF
> > RIB into BGP,
> > for purposes of producing a vpnv4 route for advertisement to
> > other PEs".
> > So, as you can see, the route in VRF B is _imported_
> > (installed into the
> > proper RIB by BGP based on the RTs associated with the route)
> > but there is
> > no reason to export it.
> >
> > At an architectural level, the BGP advertisement needs to be
> > based on which
> > vpnv4 routes are produced on a given PE, which is a separate
> > issue from
> > what VRF RIB a route is installed into. The vpnv4 route is
> > based on the RIB
> > entry which exported the route.  (the fact that some implementations
> > internally generate a vpnv4 route for VRF B, for purposes of
> > book-keeping,
> > is separate from the 2547 architecture).
> >
> > If you have a need to control the RT set which is associated
> > with a vpnv4
> > route, then there are other mechanisms to do so.
> >
> > If one followed your suggested model consistently then every
> > route received
> > by PE and imported into multiple VRFs would result in the
> > re-advertisement
> > of multiple vpnv4 routes. This would both be a violation of iBGP
> > procedures, and would result in an explosion of routing information.
> >
> > >Then I think it is necessary to advertise route
> > 2:2::10.0.0.0/8 as well.
> > >
> > >Conceptually I think that both routes should be advertised.
> > >What is reason not to do so ?
> > >
> > >Best Regards,
> > >Marko Kulmala
> > >
> > > > -----Original Message-----
> > > > From: raszuk@cisco.com [mailto:raszuk@cisco.com]
> > > > Sent: 30. hein=E4kuuta 2003 12:35
> > > > To: jsmith4112003@yahoo.co.uk
> > > > Cc: raszuk@cisco.com; l3vpn@ietf.org
> > > > Subject: Re: Advertising Routes to a PE
> > > >
> > > >
> > > >
> > > > Yes this is correct :). Advertising of locally imported
> > routes should
> > > > not be allowed.
> > > >
> > > > R.
> > > >
> > > > > John Smith wrote:
> > > > >
> > > > > Hi,
> > > > >
> > > > > I have a conceptual doubt.
> > > > >
> > > > > I have two VRFs A and B defined on a PE router. Both of
> > > > them have overlapping Route
> > > > > Targets.
> > > > >
> > > > > My basic config goes something like this.
> > > > >
> > > > > !
> > > > > ip vrf A
> > > > >  rd 1:1
> > > > >  route-target both 100:100
> > > > > !
> > > > > ip vrf B
> > > > >  rd 2:2
> > > > >  route-target both 100:100
> > > > > !
> > > > >
> > > > > Now i learn a route (say 10.0.0.0/8) from VRF A. I
> > > > redistribute it into VRF B too as they
> > > > > have overlapping RTs.
> > > > >
> > > > > Now when this PE router peers up with another PE peer it
> > > > will announce 1:1::10.0.0.0/8
> > > > > along with the associated Route Targets. Should it also
> > > > advertise 2:2::10.0.0.0/8 to the
> > > > > remote PE router?
> > > > >
> > > > > I have a router from one major vendor which is not doing
> > > > this. I see it only advertising
> > > > > 1:1::10.0.0.0/8
> > > > >
> > > > > Is this correct?
> > > > >
> > > > > Regards,
> > > > > Smith
> > > > >
> > > > >
> > > > ______________________________________________________________
> > > > __________
> > > > > Want to chat instantly with your online friends?  Get the
> > > > FREE Yahoo!
> > > > > Messenger http://uk.messenger.yahoo.com/
> > > >
> > > >
> > >
> > >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > >The information contained in this message may be privileged
> > >and confidential and protected from disclosure.  If the
> > >reader of this message is not the intended recipient, or an
> > >employee or agent responsible for delivering this message to
> > >the intended recipient, you are hereby notified that any
> > >reproduction, dissemination or distribution of this
> > >communication is strictly prohibited. If you have received
> > >this communication in error, please notify us immediately by
> > >replying to the message and deleting it from your computer.
> > >
> > >Thank you.
> > >Tellabs
> > >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> >
> >
> >
>
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>The information contained in this message may be privileged
>and confidential and protected from disclosure.  If the
>reader of this message is not the intended recipient, or an
>employee or agent responsible for delivering this message to
>the intended recipient, you are hereby notified that any
>reproduction, dissemination or distribution of this
>communication is strictly prohibited. If you have received
>this communication in error, please notify us immediately by
>replying to the message and deleting it from your computer.
>
>Thank you.
>Tellabs
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D





From exim@www1.ietf.org  Wed Jul 30 10:32:26 2003
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Date: Wed, 30 Jul 2003 10:26:56 -0400
From: Syed Ahmed <syed.ahmed@mci.com>
Subject: RE: WG Focus Item
In-reply-to: <DKEJJCOCJMHEFFNMLKMPGENEJOAA.Ronald.P.Bonica@mci.com>
To: l3vpn@ietf.org
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Ron,

I would like to volunteer. Can you point me to the draft. Thanks.

Syed

-----Original Message-----
From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org]On Behalf Of Ron
Bonica
Sent: Wednesday, July 30, 2003 10:15 AM
To: l3vpn@ietf.org
Subject: RE: WG Focus Item


Folks,

I haven't seen many comments regarding draft-fang-ppvpn-security-framework
on the list. In fact,
the silence is deafening. Could I ask for a few volunteers to critically
review this draft?
Please email the list if you are willing to volunteer.

                                     Ron


> -----Original Message-----
> From: Ron Bonica [mailto:Ronald.P.Bonica@mci.com]
> Sent: Tuesday, July 22, 2003 9:56 AM
> To: l3vpn@ietf.org
> Subject: WG Focus Item
>
>
> Folks,
>
> During the next two weeks, please dedicate some time to reviewing
> draft-fang-ppvpn-security-framework-01. Send comments to this
> mailing list. When comments have been received, the authors will
> spin a new version and we will have a WG last call.
>
> We need to send this draft to the ADs/IESG fairly quickly a)
> because it is important and b) because so many other drafts
> depend upon it.
>
> ===========================================
> Ronald P. Bonica       Ph: 703 886 1681
> vBNS Engineering       page: 1 888 268 8021
> Ashburn, Va.
> ===========================================
> "If a man marches out of step with his
> fellows it may be that he hears the sound
> of a different drummer or, perhaps that
> he has a poor sense of rhythm."
>             -- Henry David Thoreau






From exim@www1.ietf.org  Wed Jul 30 12:58:28 2003
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To: Dan Tappan <tappan@cisco.com>
Cc: marko.kulmala@tellabs.com, jsmith4112003@yahoo.co.uk, raszuk@cisco.com,
        l3vpn@ietf.org, enke@redback.com
Subject: Re: Advertising Routes to a PE 
In-Reply-To: Message from Dan Tappan <tappan@cisco.com> 
   of "Wed, 30 Jul 2003 09:35:56 EDT." <4.3.2.7.2.20030730092519.029a89b0@flask.cisco.com> 
Date: Wed, 30 Jul 2003 09:56:50 -0700
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Hi, Dan:

> Message-Id: <4.3.2.7.2.20030730092519.029a89b0@flask.cisco.com>
> Date: Wed, 30 Jul 2003 09:35:56 -0400
> To: marko.kulmala@tellabs.com
> From: Dan Tappan <tappan@cisco.com>
> Subject: RE: Re: Advertising Routes to a PE
> Cc: jsmith4112003@yahoo.co.uk, raszuk@cisco.com, l3vpn@ietf.org
> In-Reply-To: <H000037a03938ef1.1059569210.maile01.tellabs.fi@MHS>
> 
> At 03:46 PM 7/30/2003 +0300, marko.kulmala@tellabs.com wrote:
> >I think that below configuration works even if route 2:2::10.0.0.0/8 is
> >not advertised since export RTs in the VRF A and B are the same.
> >
> >But what if VRF B has different export RTs than VRF A ?
> 
> In the scenario you've described the route in VRF B is not exported, so=20
> export RTs do not apply.
> 
> In this context 'exported' means "redistributed from a VRF RIB into BGP,=20
> for purposes of producing a vpnv4 route for advertisement to other PEs".=20
> So, as you can see, the route in VRF B is _imported_ (installed into the=20
> proper RIB by BGP based on the RTs associated with the route) but there is=
> no reason to export it.
> 
> At an architectural level, the BGP advertisement needs to be based on which=
> vpnv4 routes are produced on a given PE, which is a separate issue from=20
> what VRF RIB a route is installed into. The vpnv4 route is based on the RIB=
> entry which exported the route.  (the fact that some implementations=20
> internally generate a vpnv4 route for VRF B, for purposes of book-keeping,=
> is separate from the 2547 architecture).
> 
> If you have a need to control the RT set which is associated with a vpnv4=20
> route, then there are other mechanisms to do so.
> 
> If one followed your suggested model consistently then every route received=
> by PE and imported into multiple VRFs would result in the re-advertisement=
> of multiple vpnv4 routes. This would both be a violation of iBGP
> procedures, and would result in an explosion of routing information.

In this particular case, the imported route is locally sourced (and is not
from iBGP). The normal BGP procedure would not disallow its advertisement,
would it?

To answer the question (raised by Marko?):

    But what if VRF B has different export RTs than VRF A ?

It seems to me that certain intended VPN associations would not be achieved
without advertsing the locally imported (and locally sourced) route.

-- Enke

> 
> >Then I think it is necessary to advertise route 2:2::10.0.0.0/8 as well.
> >
> >Conceptually I think that both routes should be advertised.
> >What is reason not to do so ?
> >
> >Best Regards,
> >Marko Kulmala
> >
> > > -----Original Message-----
> > > From: raszuk@cisco.com [mailto:raszuk@cisco.com]
> > > Sent: 30. hein=E4kuuta 2003 12:35
> > > To: jsmith4112003@yahoo.co.uk
> > > Cc: raszuk@cisco.com; l3vpn@ietf.org
> > > Subject: Re: Advertising Routes to a PE
> > >
> > >
> > >
> > > Yes this is correct :). Advertising of locally imported routes should
> > > not be allowed.
> > >
> > > R.
> > >
> > > > John Smith wrote:
> > > >
> > > > Hi,
> > > >
> > > > I have a conceptual doubt.
> > > >
> > > > I have two VRFs A and B defined on a PE router. Both of
> > > them have overlapping Route
> > > > Targets.
> > > >
> > > > My basic config goes something like this.
> > > >
> > > > !
> > > > ip vrf A
> > > >  rd 1:1
> > > >  route-target both 100:100
> > > > !
> > > > ip vrf B
> > > >  rd 2:2
> > > >  route-target both 100:100
> > > > !
> > > >
> > > > Now i learn a route (say 10.0.0.0/8) from VRF A. I
> > > redistribute it into VRF B too as they
> > > > have overlapping RTs.
> > > >
> > > > Now when this PE router peers up with another PE peer it
> > > will announce 1:1::10.0.0.0/8
> > > > along with the associated Route Targets. Should it also
> > > advertise 2:2::10.0.0.0/8 to the
> > > > remote PE router?
> > > >
> > > > I have a router from one major vendor which is not doing
> > > this. I see it only advertising
> > > > 1:1::10.0.0.0/8
> > > >
> > > > Is this correct?
> > > >
> > > > Regards,
> > > > Smith
> > > >
> > > >
> > > ______________________________________________________________
> > > __________
> > > > Want to chat instantly with your online friends?  Get the
> > > FREE Yahoo!
> > > > Messenger http://uk.messenger.yahoo.com/
> > >
> > >
> >
> >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> >The information contained in this message may be privileged
> >and confidential and protected from disclosure.  If the
> >reader of this message is not the intended recipient, or an
> >employee or agent responsible for delivering this message to
> >the intended recipient, you are hereby notified that any
> >reproduction, dissemination or distribution of this
> >communication is strictly prohibited. If you have received
> >this communication in error, please notify us immediately by
> >replying to the message and deleting it from your computer.
> >
> >Thank you.
> >Tellabs
> >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> 
> 





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This is a good analysis of the PPVPN security issues. Of necessity
it overlaps with the detailed security analysis that we need (but
have not yet written) for PWE3. The overlap is not complete
in that there is obviously some material here that we do not need,
and there is other material that is not addressed (i.e. timing
attacks on TDM PWs). It would be good if we could find a way to
share this work rather than start from scratch.

I have a number of detailed comments below.

Regards

Stewart


SB> Number of authors exceeds current limit=20



2. Security Reference Model

    Also outside the scope are all aspects of network security which are
    independent of whether a network is a PPVPN network or a
    conventional network (for example, attacks from the Internet to a
    server of a given PPVPN user will not be considered here, unless the
    way to provision the PPVPN network could make a difference to the
    security of this server).

SB> This is the first time you use the term server, and I not sure I
SB> understand what you mean. Presumably you refer to the equipment
SB> that interfaces the VPN to the VPN core (and hence Internet). In
SB> which case it is not just the provisioning mechanism that needs
SB> to be considered.

3. Security Threats


    A successful attack on a particular PPVPN or on a service provider's
    PPVPN infrastructure would be expected to have effects of the
    following unhappy sorts:
  SB> unhappy :( ? I think that the sentence needs rewording?


    In the case of PPVPNs, some parties may be in more advantaged
    positions that enable them to launch types of attacks not available
    to others.  For example other PPVPN users of the same service
SB> s/other PPVPN/PPVPN/
SB> Also shouldn't it now be l3vpn? Although there is some overlap
SB> with l2vpn, there are important differences in the vulnerabilities.

    It is also useful to consider the likelihood of different sorts of
    threats occurring.  There is at least a perceived difference in the
    likelihood of most types of attacks being successfully mounted in
    different environments, such as:

     - In a TDM or ATM access network between a PPVPN user and the
       service provider
     - In an Ethernet access network
SB> I am not sure that there issues are VPN specific, but we will see
SB> what gets said later.

     - In a PPVPN contained within one service provider's network
     - In a PPVPN transiting the public Internet
SB> It may be dangerous to differentiate from because this may change
SB> within the lifetime of a service - assuming PPVPN is succesfull


3.1.3.  Unauthorized Observation/Modification/Deletion of Data Traffic

    This refers to "sniffing" VPN packets and examining their contents.
    It also includes modifying the contents of packets in flight, or
    causing packets in flight to be discarded.  Such attacks would
    typically occur on links in the network but might also occur in a
    compromised node of the network.
SB> I would have thought that modification or deletion was more likely
SB> in a node.

SB> Under dataplane you also need to consider DOS on the PE (from either
SB> inside or outside the VPN) which I do dnot think that you cover.

3.2.    Attacks on the Control Plane

    This category encompasses attacks on the control structures operated
    by the PPVPN service provider.

3.2.1.  Denial of Service Attacks on the Network Infrastructure

    DOS attacks could be mounted specifically against the mechanisms the
    service provider uses to provide PPVPNs e.g. IPsec, MPLS, etc., or
    against the general infrastructure of the service provider e.g. core
    routers.  (The latter case is within the scope of this document only
    if the attack happens in relation with the VPN service, otherwise is
    not a PPVPN-specific issue.)

    Of special concern for PPVPNs is denial of service to one PPVPN user
    caused by the otherwise-legitimate activities of another PPVPN user.
    This can occur for example if one PPVPN user's activities are
    allowed to consume excessive network resources of any sort that are
    also needed to serve other PPVPN users.

SB> This is a legitimate attack, but I don't think that it belongs under
SB> control plane sub-heading. It is a dataplane attack.


3.2.3.  Cross-connection of Traffic Between PPVPNs

    This refers to the event where expected isolation between separate
    PPVPNs is breached.  This includes cases such as:

     - A site being connected into the "wrong" VPN
     - Two or more VPNs being improperly merged together
     - A point-to-point VPN connecting the wrong two points
     - Any packet or frame being improperly delivered outside the VPN it
       is sent in.

    Mis-connection or cross-connection of VPNs has a high likelihood of
    being the result of service provider or equipment vendor error
    rather than malicious action.

SB> A compomised router could do this.

3.2.4.  Attacks Against PPVPN Routing Protocols

    This encompasses attacks against routing protocols that are run by
    the service provider.

SB> This sentence needs a scope limiting rider.

    In layer 3 VPNs with dynamic routing this
    would typically relate to the distribution of per-VPN routes as well
    as backbone routes.  In layer 2 VPNs this would typically relate
    only to the distribution of backbone routes.  Specific attacks
    against popular routing protocols have been widely studied and
    described in [Beard].

SB> Again I am worried about the scoping here.
SB> Surely in L2 it is the distribution of VPN endpoints (or authenticati=
on
SB> info that is the PPVPN specific concern, general route distribution i=
s
SB> surely out of scope.

3.2.7.  Other Attacks on PPVPN Control Traffic

    Besides routing and management protocols (covered separately in the
    previous sections) a number of other control protocols are used for
    membership discovery and tunnel establishment in various PPVPN
    approaches.  These include but may not be limited to:

     - MPLS signaling (LDP, RSVP-TE)
     - IPsec signaling (IKE)
     - L2TP
     - BGP-based membership discovery
     - Database-based membership discovery (e.g. RADIUS-based)

    Attacks might subvert or disrupt the activities of these protocols,
    for example via impersonation or DOS attacks.

SB> A network that has these vulnerabilities does not just have PPVPN
SB> issues.


4.1.    Cryptographic techniques

    Packet lengths are typically increased when the packets are
    encrypted, increasing the network traffic load and adding to the
    likelihood of packet fragmentation with its increased overhead.

SB> Do you want to talk about MTU here?


4.1.3.  Cryptographic techniques in Layer 2 PPVPNs

    Layer 2 PPVPNs will generally not be able to use IPsec to provide
    encryption throughout the entire network.  They may be able to use
    IPsec for PE-PE traffic where it is encapsulated in IP packets,

SB> Does this mean that we need an MPLSsec work item?


4.3.    Access Control techniques

SB> Should you you call out the use of internal only addresses for
SB> the VPN infrastructure? This is called up later - perhaps a
SB> forward reference?


4.4.    Use of Isolated Infrastructure

    One way to protect the infrastructure used for support of VPNs is to
    separate the resources for support of VPNs from the resources used
    for other purposes (such as support of Internet services). In some
    cases this may make use of a physically separate equipment for VPN
    services, or even a physically separate network.

    For example, PE-based L3 VPNs may be run on a separate backbone not
    connected to the Internet, or may make use of separate edge routers
    from those used to support Internet service.

SB> This is where local (to the provider) addresses help.



6.4.    CE Authentication

    It is not possible for an outsider to install a CE and pretend to
    belong to a specific PPVPN, to which this CE does not belong in
    reality.

SB> I think that you need to restate this, to state that authentication
SB> makes this impossible (well actually just difficult).

6.5.    Integrity

    Data in transit must be cryptographically secured such that it
    cannot be altered.

6.6.    Anti-Replay

    Data in transit must be cryptographically secured such that it
    cannot be recorded and replayed later.

SB> You may wish to expand the last two sections a little so that the
SB> title is not integral to reading the sentence.



7. Provider Security Requirements

    The PPVPN service provider requirements defined here are the
    requirements for the PPVPN core in the reference model.  The core
    network can be implemented with different types of network
    technologies, and each core network may use different technologies
    to provide the PPVPN services to users with different levels of
    offered security. Therefore, a PPVPN service provider may fulfill
    any number of the security requirements listed in this section. This
    ^^^^^^^^^^
SB> Surely the necessary number?


    These requirements are focused on: 1) how to protect the PPVPN core
    from various attacks outside the core including PPVPN users and non-

SB> attacks originating from ...?
SB> Some of this is out of scope

    Note that a PPVPN core is
    not more vulnerable against attacks than a core that does not
    provide PPVPNs.

SB> That depends. There are for example more potential methods of
SB> disguising an originator, and there are likely to be tunnel
SB> endpoints that might be put to use.
SB>
SB> Your contrasting point is correct, but I am not sure that the
SB> previous point adds value.




    With the cost of authentication coming down rapidly, the application
    of control plane authentication may not increase the cost of
    implementation for providers significantly, and will help to improve
    the security of the core. If the core is dedicated to VPN services=20
                             rd   and without any interconnects to 3  par=
ties=20
then this may reduce the
    requirement for authentication of the core control plane.

SB> layout problem that appears in the HTML that I cut this from. Missing
SB> LF?


    Normal TTL propagation may be altered to make the backbone look like
    one hop from the outside, but caution needs to be taken for loop
    prevention.

SB> I thought that this was the default in a tunnel?

    This prevents the backbone addresses to be exposed
    through trace route, however this must also be assessed against
    operational requirements for end to end fault tracing.

SB> Addresses? Surely hop count? I don't see how you propagate the
SB> trace route packets between the user and the provider network.
SB> A secure VPN infrastructure is surely a VPN wrt the user VPN, and
SB> hence traffic mixing cannot occur?

    Many of these were not particular issues when an IP core was
    designed to support Internet services only. When providing PPVPN
    services, new requirements are introduced to satisfy the security
    needs for VPN services. Similar consideration apply to L2 VPN
    services.

SB> This needs to be fleshed out. An example perhaps?

7.1.2.  Data Plane Protection

    PPVPN using IPSec technologies provide VPN users with encryption of
    secure user data.

    In today=C6s MPLS, ATM, or Frame Relay networks, encryption is not
    provided as a basic feature. Mechanisms can be used to secure the
    MPLS data plane to secure the data carried over MPLS core.

SB> But a private MPLS core switching a PW is just as secure (or insecure=
)
SB> as the ATM or FR network that it is replacing.

    Additionally, if the core is dedicated to VPN services and without=20
                         rd   any external interconnects to 3  party netw=
orks=20
then there is no
    obvious need for encryption of the user data plane.

SB> layout?




7.2.    Protection on the User Access Link

    Peer / Neighbor protocol authentication may be used to enhance
    security. For example, BGP MD5 authentication may be used to enhance
    security on PE-CE links using eBGP. In the case of Inter-provider
    connection, authentication / encryption mechanisms between ASes,
    such as IPSec, may be used.

SB> Is this a special to PPVPN problem?



    7.2.4 Customer VPN monitoring tools

    End users requiring visibility of VPN specific statistics on the
    core e.g. routing table, interface status, QoS statistics, impose
    requirements for mechanisms at the PE to both validate the incoming
    user and limit the views available to that particular users VPN.

SB> It is not clear to me that the customer has any right to these,
SB> surely the customer just has the right to test the SLA from their
SB> own side of the fence?


7.3.    General Requirements for PPVPN Providers

SB> I am not sure this section adds much value given that the reader
SB> has read this far.


8.2.    Template

SB> I am not sure that this section adds much value

9. Security Considerations

    There are no further security considerations in addition to what
    discussed in the previous sections.

SB> A Catch-22 problem if ever I saw one :)

SB> It might be worth noting somewhere that most existing "physical"
SB> networks are actually virtual (TDM, ATM, FR etc), and so the
SB> comparision is not zero risk to PPVPN risk, but SOME risk to
SB> PPVPN risk.





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Date: Wed, 30 Jul 2003 10:53:17 -0700
To: l3vpn@ietf.org
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[[ l3vpn: These are the comments that I sent to the draft's editor 
last week. Comments on my comments from this list are of course 
welcome. --Paul Hoffman ]]

Hi again. As we discussed, here are my comments. Overall, I'm very 
excited about the document and am glad you have put so much time into 
it.

Overall: There are some non-ASCII characters in different parts of 
the document. You need to do a sweep to catch them all.

Title page: The RFC Editor has a rule against listing more than five 
authors. I suggest that only you be listed as the editor, and that 
you add an author's list section before the conventions section.

Section 2, second paragraph. The second sentence talks about "one or 
more PPVPN service providers" but inter-AS issues are not discussed 
in the document. There is a whole new category of security issues 
with inter-AS VPNs, such as competitive attacks, QoS failures at the 
inter-AS boundary, and general finger-pointing. You can either add a 
new section, or simply change this sentence to say "...control of a a 
PPVPN service provider".

Section 3, second list. "Persons within an organization that is a 
separate PPVPN of the same service provider" is unclear. I suggest 
changing it to "Users of a different PPVPN that is managed by the 
same PPVPN service provider". Also, I think that this is what most 
users consider to be the most likely source of attack; you might 
consider moving this item to the top of the list.

Section 3.1.1. The phrase "with the objective of having them accepted 
as legitimate" is a bit misleading here. In a PPVPN, all packets are 
always considered to be legitimate. I would remove it to make the 
first sentence shorter and more to the point.

Section 3.1.3. Modification and deletion of traffic is quite 
different that observation. I suggest grouping insertion, 
modification, and deletion in one section, and cover observation in a 
different section. Also, I think you should remove the second 
sentence; there is very little good evidence about where observation 
happens.

Section 3.1.5. This section should be removed; it is no different 
than the combination of insertion and observation (and sometimes 
observation isn't even needed).

Section 4. Maybe change the section title to "Defensive Techniques 
for Service Providers". This makes it clearer that the users are not 
expected to use any of these techniques in order to make the VPN 
secure.

Section 4.1, last paragraph. I believe that this paragraph should be 
removed because if the end user has any control over the keys, it is 
no longer provider-provisioned: the VPN has mixed provisioning and 
the security of the VPN becomes much less clear. This might be 
controversial, so you might even want to take it to the mailing 
lists. To me, an IPsec VPN where the ISP controls the IPsec devices 
but the user can mess things up by using weak keys is just a bad idea.

Section 4.1.2, first paragraph. I think IPsec for management of the 
devices is incredibly rare. Maybe remove the second sentence, and add 
a bullet at the bottom of the list that says "- IPsec is sometimes 
used, but much less often than TLS."

Section 6.1.1, first paragraph. The second sentence makes it sound 
like it is OK to use a NAT to achieve address separation. That's 
technically true, but it wipes out many of the basic features of the 
protected network. I suggest simply removing that sentence, since it 
is unrelated to the correct way of creating VPNs.

Section 6.7. Non-repudiation is rat-hole. It inherently relies on 
legal and social definitions, not technical ones. I cannot imagine 
how non-repudiation could be asserted in a VPN, since the entire VPN 
is a single administrative entity. You should probably just remove 
this section.

Section 7.1.1, first paragraph. I thought that TCP MD5 could only be 
used as an integrity check, not for authentication. That is, it only 
verifies that the packet was not accidentally changed in transit, not 
authenticating its source or preventing an attacker from replacing 
the whole packet with a new MD5.

Section 7.2, first paragraph. Same issue as in section 7.1.1 with 
respect to BCP MD5.

Section 8.2, step 8. Remove the "[Editor's note..."; otherwise, 
everyone will just repeat it in their document. You have made it 
clear that non-VPN DoS attacks are out of scope.

Section 8.2, step 11. It is not clear what kind of confidentiality 
you are referring to. I suggest changing this to "The approach 
provides cryptographic confidentiality protection...".

I hope this helps!

--Paul Hoffman, Director
--VPN Consortium




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From: "Eric W Gray" <egray@westridgenetworks.com>
To: <syed.ahmed@mci.com>, <l3vpn@ietf.org>
Subject: RE: WG Focus Item
Date: Wed, 30 Jul 2003 14:37:44 -0400
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Syed,

	It is at:

http://www.ietf.org/internet-drafts/draft-fang-ppvpn-security-framework-
01.txt

--
Eric Gray

-----Original Message-----
From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org] On Behalf Of
Syed Ahmed
Sent: Wednesday, July 30, 2003 10:27 AM
To: l3vpn@ietf.org
Subject: RE: WG Focus Item

Ron,

I would like to volunteer. Can you point me to the draft. Thanks.

Syed

-----Original Message-----
From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org]On Behalf Of Ron
Bonica
Sent: Wednesday, July 30, 2003 10:15 AM
To: l3vpn@ietf.org
Subject: RE: WG Focus Item


Folks,

I haven't seen many comments regarding
draft-fang-ppvpn-security-framework
on the list. In fact,
the silence is deafening. Could I ask for a few volunteers to critically
review this draft?
Please email the list if you are willing to volunteer.

                                     Ron


> -----Original Message-----
> From: Ron Bonica [mailto:Ronald.P.Bonica@mci.com]
> Sent: Tuesday, July 22, 2003 9:56 AM
> To: l3vpn@ietf.org
> Subject: WG Focus Item
>
>
> Folks,
>
> During the next two weeks, please dedicate some time to reviewing
> draft-fang-ppvpn-security-framework-01. Send comments to this
> mailing list. When comments have been received, the authors will
> spin a new version and we will have a WG last call.
>
> We need to send this draft to the ADs/IESG fairly quickly a)
> because it is important and b) because so many other drafts
> depend upon it.
>
> ===========================================
> Ronald P. Bonica       Ph: 703 886 1681
> vBNS Engineering       page: 1 888 268 8021
> Ashburn, Va.
> ===========================================
> "If a man marches out of step with his
> fellows it may be that he hears the sound
> of a different drummer or, perhaps that
> he has a poor sense of rhythm."
>             -- Henry David Thoreau









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From: Mohan Dattatreya <mohan@tasmannetworks.com>
To: l3vpn@ietf.org,
        "'Ron Bonica '"
	 <IMCEAMAILTO-Ronald+2EP+2EBonica+40mci+2Ecom@tasmannetworks.com>
Subject: RE: WG Focus Item
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Ron,

I would like to volunteer as well.

Thanks
Mohan

-----Original Message-----
From: Eric W Gray [mailto:egray@westridgenetworks.com]
Sent: Wednesday, July 30, 2003 11:38 AM
To: syed.ahmed@mci.com; l3vpn@ietf.org
Subject: RE: WG Focus Item


Syed,

	It is at:

http://www.ietf.org/internet-drafts/draft-fang-ppvpn-security-framework-
01.txt

--
Eric Gray

-----Original Message-----
From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org] On Behalf Of
Syed Ahmed
Sent: Wednesday, July 30, 2003 10:27 AM
To: l3vpn@ietf.org
Subject: RE: WG Focus Item

Ron,

I would like to volunteer. Can you point me to the draft. Thanks.

Syed

-----Original Message-----
From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org]On Behalf Of Ron
Bonica
Sent: Wednesday, July 30, 2003 10:15 AM
To: l3vpn@ietf.org
Subject: RE: WG Focus Item


Folks,

I haven't seen many comments regarding
draft-fang-ppvpn-security-framework
on the list. In fact,
the silence is deafening. Could I ask for a few volunteers to critically
review this draft?
Please email the list if you are willing to volunteer.

                                     Ron


> -----Original Message-----
> From: Ron Bonica [mailto:Ronald.P.Bonica@mci.com]
> Sent: Tuesday, July 22, 2003 9:56 AM
> To: l3vpn@ietf.org
> Subject: WG Focus Item
>
>
> Folks,
>
> During the next two weeks, please dedicate some time to reviewing
> draft-fang-ppvpn-security-framework-01. Send comments to this
> mailing list. When comments have been received, the authors will
> spin a new version and we will have a WG last call.
>
> We need to send this draft to the ADs/IESG fairly quickly a)
> because it is important and b) because so many other drafts
> depend upon it.
>
> ===========================================
> Ronald P. Bonica       Ph: 703 886 1681
> vBNS Engineering       page: 1 888 268 8021
> Ashburn, Va.
> ===========================================
> "If a man marches out of step with his
> fellows it may be that he hears the sound
> of a different drummer or, perhaps that
> he has a poor sense of rhythm."
>             -- Henry David Thoreau









From exim@www1.ietf.org  Wed Jul 30 15:07:29 2003
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From: "Eric W Gray" <egray@westridgenetworks.com>
To: "'Ron Bonica'" <Ronald.P.Bonica@mci.com>, <l3vpn@ietf.org>
Subject: RE: WG Focus Item
Date: Wed, 30 Jul 2003 15:02:30 -0400
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Ron,

	I assume you still want the actual review comments to
go to the mailing list as well. Is that not the case?

--
Eric Gray

-----Original Message-----
From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org] On Behalf Of
Ron Bonica
Sent: Wednesday, July 30, 2003 10:15 AM
To: l3vpn@ietf.org
Subject: RE: WG Focus Item

Folks,

I haven't seen many comments regarding
draft-fang-ppvpn-security-framework
on the list. In fact,
the silence is deafening. Could I ask for a few volunteers to critically
review this draft?
Please email the list if you are willing to volunteer.

                                     Ron


> -----Original Message-----
> From: Ron Bonica [mailto:Ronald.P.Bonica@mci.com]
> Sent: Tuesday, July 22, 2003 9:56 AM
> To: l3vpn@ietf.org
> Subject: WG Focus Item
>
>
> Folks,
>
> During the next two weeks, please dedicate some time to reviewing
> draft-fang-ppvpn-security-framework-01. Send comments to this
> mailing list. When comments have been received, the authors will
> spin a new version and we will have a WG last call.
>
> We need to send this draft to the ADs/IESG fairly quickly a)
> because it is important and b) because so many other drafts
> depend upon it.
>
> ===========================================
> Ronald P. Bonica       Ph: 703 886 1681
> vBNS Engineering       page: 1 888 268 8021
> Ashburn, Va.
> ===========================================
> "If a man marches out of step with his
> fellows it may be that he hears the sound
> of a different drummer or, perhaps that
> he has a poor sense of rhythm."
>             -- Henry David Thoreau








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Date: Wed, 30 Jul 2003 16:00:50 -0400
To: Enke Chen <enke@redback.com>
From: Dan Tappan <tappan@cisco.com>
Subject: Re: Advertising Routes to a PE 
Cc: marko.kulmala@tellabs.com, jsmith4112003@yahoo.co.uk, raszuk@cisco.com,
        l3vpn@ietf.org
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At 09:56 AM 7/30/2003 -0700, Enke Chen wrote:

>In this particular case, the imported route is locally sourced (and is not
>from iBGP). The normal BGP procedure would not disallow its advertisement,
>would it?
>
>To answer the question (raised by Marko?):
>
>     But what if VRF B has different export RTs than VRF A ?
>
>It seems to me that certain intended VPN associations would not be achieved
>without advertsing the locally imported (and locally sourced) route.

Hi Enke,

Look at it another way. Let's say the configuration is you hypothesize, 
maybe as below:
  ip vrf A
   rd 1:1
   route-target both 100:100
  !
  ip vrf B
   rd 2:2
   route-target both 100:100
   route-target export 100:200
!


The question is: with the above configuration, at the 2547 architectural 
level, how many copies of the route _need_ to be advertised? I claim that 
you get identical results advertising a single route as advertising both 
the original and the sourced route. That is, if the two routes are 
identical (which they will be by definition if the route in VRF A is 
imported into VRF B), and given the definition of RT in section 4.3.1 of 
draft-ietf-l3vpn-rfc2547bis-00, then advertising

1:1:x/x,  Label=L1, RT={ 100:100}
2:2:x/x, Label=L1, RT={100:100, 100:200}

will produce exactly the same effect on a remote PE as advertising

1:1:x/x, Label=L1, RT={100:100, 100:200}

So, architecturally only the latter is necessary. Now, if the only way for 
a particular  implementation to produce route with all desired RT sets was 
to advertise two routes, then I suppose there's nothing which forbids it to 
do so; but IMO it would be inferior to an implementation that can advertise 
only a single route. In at least one implementation there are ways to 
achieve this.







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Date: Wed, 30 Jul 2003 16:46:40 -0400
From: Ron Bonica <Ronald.P.Bonica@mci.com>
Subject: RE: WG Focus Item
In-reply-to: <00d801c356cd$23972be0$6901a8c0@khumbu>
To: Eric W Gray <egray@westridgenetworks.com>, l3vpn@ietf.org
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Yes. Please send comments to the list.

             -r


> -----Original Message-----
> From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org]On Behalf Of
> Eric W Gray
> Sent: Wednesday, July 30, 2003 3:03 PM
> To: 'Ron Bonica'; l3vpn@ietf.org
> Subject: RE: WG Focus Item
> 
> 
> Ron,
> 
> 	I assume you still want the actual review comments to
> go to the mailing list as well. Is that not the case?
> 
> --
> Eric Gray
> 
> -----Original Message-----
> From: l3vpn-admin@ietf.org [mailto:l3vpn-admin@ietf.org] On Behalf Of
> Ron Bonica
> Sent: Wednesday, July 30, 2003 10:15 AM
> To: l3vpn@ietf.org
> Subject: RE: WG Focus Item
> 
> Folks,
> 
> I haven't seen many comments regarding
> draft-fang-ppvpn-security-framework
> on the list. In fact,
> the silence is deafening. Could I ask for a few volunteers to critically
> review this draft?
> Please email the list if you are willing to volunteer.
> 
>                                      Ron
> 
> 
> > -----Original Message-----
> > From: Ron Bonica [mailto:Ronald.P.Bonica@mci.com]
> > Sent: Tuesday, July 22, 2003 9:56 AM
> > To: l3vpn@ietf.org
> > Subject: WG Focus Item
> >
> >
> > Folks,
> >
> > During the next two weeks, please dedicate some time to reviewing
> > draft-fang-ppvpn-security-framework-01. Send comments to this
> > mailing list. When comments have been received, the authors will
> > spin a new version and we will have a WG last call.
> >
> > We need to send this draft to the ADs/IESG fairly quickly a)
> > because it is important and b) because so many other drafts
> > depend upon it.
> >
> > ===========================================
> > Ronald P. Bonica       Ph: 703 886 1681
> > vBNS Engineering       page: 1 888 268 8021
> > Ashburn, Va.
> > ===========================================
> > "If a man marches out of step with his
> > fellows it may be that he hears the sound
> > of a different drummer or, perhaps that
> > he has a poor sense of rhythm."
> >             -- Henry David Thoreau
> 
> 
> 
> 
> 




From exim@www1.ietf.org  Wed Jul 30 16:56:29 2003
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To: Dan Tappan <tappan@cisco.com>
Cc: marko.kulmala@tellabs.com, jsmith4112003@yahoo.co.uk, raszuk@cisco.com,
        l3vpn@ietf.org, enke@redback.com
Subject: Re: Advertising Routes to a PE 
In-Reply-To: Message from Dan Tappan <tappan@cisco.com> 
   of "Wed, 30 Jul 2003 16:00:50 EDT." <4.3.2.7.2.20030730153233.029c0df0@flask.cisco.com> 
Date: Wed, 30 Jul 2003 13:55:32 -0700
From: Enke Chen <enke@redback.com>
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Hi, Dan:

> Message-Id: <4.3.2.7.2.20030730153233.029c0df0@flask.cisco.com>
> Date: Wed, 30 Jul 2003 16:00:50 -0400
> To: Enke Chen <enke@redback.com>
> From: Dan Tappan <tappan@cisco.com>
> Subject: Re: Advertising Routes to a PE 
> Cc: marko.kulmala@tellabs.com, jsmith4112003@yahoo.co.uk,
> 	raszuk@cisco.com, l3vpn@ietf.org
> In-Reply-To: <20030730165651.0010A15D3C1@popserv1.redback.com>
> References: <Message from Dan Tappan <tappan@cisco.com>
>  <4.3.2.7.2.20030730092519.029a89b0@flask.cisco.com>
> 
> At 09:56 AM 7/30/2003 -0700, Enke Chen wrote:
> 
> >In this particular case, the imported route is locally sourced (and is not
> >from iBGP). The normal BGP procedure would not disallow its advertisement,
> >would it?
> >
> >To answer the question (raised by Marko?):
> >
> >     But what if VRF B has different export RTs than VRF A ?
> >
> >It seems to me that certain intended VPN associations would not be achieved
> >without advertsing the locally imported (and locally sourced) route.
> 
> Hi Enke,
> 
> Look at it another way. Let's say the configuration is you hypothesize, 
> maybe as below:
>   ip vrf A
>    rd 1:1
>    route-target both 100:100
>   !
>   ip vrf B
>    rd 2:2
>    route-target both 100:100
>    route-target export 100:200
> !
> 
> 
> The question is: with the above configuration, at the 2547 architectural 
> level, how many copies of the route _need_ to be advertised? I claim that 
> you get identical results advertising a single route as advertising both 
> the original and the sourced route. That is, if the two routes are 
> identical (which they will be by definition if the route in VRF A is 
> imported into VRF B), and given the definition of RT in section 4.3.1 of 
> draft-ietf-l3vpn-rfc2547bis-00, then advertising
> 
> 1:1:x/x,  Label=L1, RT={ 100:100}
> 2:2:x/x, Label=L1, RT={100:100, 100:200}
> 
> will produce exactly the same effect on a remote PE as advertising
> 
> 1:1:x/x, Label=L1, RT={100:100, 100:200}

It seems to me that there is a difference if there exists a customer on the
remote PE with the following attributes:

        vrf C:  rd 3:3,  import 100:200, export 100:200

(In that case vrf B probably should have import: 100:100 100:200.)

> 
> So, architecturally only the latter is necessary. Now, if the only way for 
> a particular  implementation to produce route with all desired RT sets was 
> to advertise two routes, then I suppose there's nothing which forbids it to 
> do so; but IMO it would be inferior to an implementation that can advertise 
> only a single route. In at least one implementation there are ways to 
> achieve this.

When the export attributes are the same for the original route and the
locally imported route, I agree that it is a nice optimization to suppress
the advertisement of the imported route. When they are different, however,
the optimization does lead to constrains on vpn association, which IMO
does not seem to be necessary or correct.

Regards,  -- Enke






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Date: Wed, 30 Jul 2003 23:30:10 +0200
From: Robert Raszuk <raszuk@cisco.com>
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To: Enke Chen <enke@redback.com>
CC: Dan Tappan <tappan@cisco.com>, marko.kulmala@tellabs.com,
        jsmith4112003@yahoo.co.uk, l3vpn@ietf.org
Subject: Re: Advertising Routes to a PE
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Hey Enke,

I must say that today operational examples tell me that there is enough
of struggle for providers to fully grasp the concept of the original's
basic export as well as per route export from the original vrf. Adding
to this a proposed - well maybe too strong word but described by you -
chained redistribution of any route when it is imported may IMHO
generate huge does of problems. Or maybe we should distinguish two cases
where export of imported route is feasible:

A) When the route is comming from CE
B) When the route is comming from PE with different RD

Cheers,
R.

> Enke Chen wrote:
> 
> Hi, Dan:
> 
> > Message-Id: <4.3.2.7.2.20030730153233.029c0df0@flask.cisco.com>
> > Date: Wed, 30 Jul 2003 16:00:50 -0400
> > To: Enke Chen <enke@redback.com>
> > From: Dan Tappan <tappan@cisco.com>
> > Subject: Re: Advertising Routes to a PE
> > Cc: marko.kulmala@tellabs.com, jsmith4112003@yahoo.co.uk,
> >       raszuk@cisco.com, l3vpn@ietf.org
> > In-Reply-To: <20030730165651.0010A15D3C1@popserv1.redback.com>
> > References: <Message from Dan Tappan <tappan@cisco.com>
> >  <4.3.2.7.2.20030730092519.029a89b0@flask.cisco.com>
> >
> > At 09:56 AM 7/30/2003 -0700, Enke Chen wrote:
> >
> > >In this particular case, the imported route is locally sourced (and is not
> > >from iBGP). The normal BGP procedure would not disallow its advertisement,
> > >would it?
> > >
> > >To answer the question (raised by Marko?):
> > >
> > >     But what if VRF B has different export RTs than VRF A ?
> > >
> > >It seems to me that certain intended VPN associations would not be achieved
> > >without advertsing the locally imported (and locally sourced) route.
> >
> > Hi Enke,
> >
> > Look at it another way. Let's say the configuration is you hypothesize,
> > maybe as below:
> >   ip vrf A
> >    rd 1:1
> >    route-target both 100:100
> >   !
> >   ip vrf B
> >    rd 2:2
> >    route-target both 100:100
> >    route-target export 100:200
> > !
> >
> >
> > The question is: with the above configuration, at the 2547 architectural
> > level, how many copies of the route _need_ to be advertised? I claim that
> > you get identical results advertising a single route as advertising both
> > the original and the sourced route. That is, if the two routes are
> > identical (which they will be by definition if the route in VRF A is
> > imported into VRF B), and given the definition of RT in section 4.3.1 of
> > draft-ietf-l3vpn-rfc2547bis-00, then advertising
> >
> > 1:1:x/x,  Label=L1, RT={ 100:100}
> > 2:2:x/x, Label=L1, RT={100:100, 100:200}
> >
> > will produce exactly the same effect on a remote PE as advertising
> >
> > 1:1:x/x, Label=L1, RT={100:100, 100:200}
> 
> It seems to me that there is a difference if there exists a customer on the
> remote PE with the following attributes:
> 
>         vrf C:  rd 3:3,  import 100:200, export 100:200
> 
> (In that case vrf B probably should have import: 100:100 100:200.)
> 
> >
> > So, architecturally only the latter is necessary. Now, if the only way for
> > a particular  implementation to produce route with all desired RT sets was
> > to advertise two routes, then I suppose there's nothing which forbids it to
> > do so; but IMO it would be inferior to an implementation that can advertise
> > only a single route. In at least one implementation there are ways to
> > achieve this.
> 
> When the export attributes are the same for the original route and the
> locally imported route, I agree that it is a nice optimization to suppress
> the advertisement of the imported route. When they are different, however,
> the optimization does lead to constrains on vpn association, which IMO
> does not seem to be necessary or correct.
> 
> Regards,  -- Enke




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Date: Wed, 30 Jul 2003 17:31:06 -0400
To: Enke Chen <enke@redback.com>
From: Dan Tappan <tappan@cisco.com>
Subject: Re: Advertising Routes to a PE 
Cc: marko.kulmala@tellabs.com, jsmith4112003@yahoo.co.uk, raszuk@cisco.com,
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At 01:55 PM 7/30/2003 -0700, Enke Chen wrote:
> > The question is: with the above configuration, at the 2547 architectural
> > level, how many copies of the route _need_ to be advertised? I claim that
> > you get identical results advertising a single route as advertising both
> > the original and the sourced route. That is, if the two routes are
> > identical (which they will be by definition if the route in VRF A is
> > imported into VRF B), and given the definition of RT in section 4.3.1 of
> > draft-ietf-l3vpn-rfc2547bis-00, then advertising
> >
> > 1:1:x/x,  Label=L1, RT={ 100:100}
> > 2:2:x/x, Label=L1, RT={100:100, 100:200}
> >
> > will produce exactly the same effect on a remote PE as advertising
> >
> > 1:1:x/x, Label=L1, RT={100:100, 100:200}
>
>It seems to me that there is a difference if there exists a customer on the
>remote PE with the following attributes:
>
>         vrf C:  rd 3:3,  import 100:200, export 100:200

I don't see it. In that case C will end up importing the same route (i.e. 
the packet will end up in the same place) either way.

>(In that case vrf B probably should have import: 100:100 100:200.)
>
> >
> > So, architecturally only the latter is necessary. Now, if the only way for
> > a particular  implementation to produce route with all desired RT sets was
> > to advertise two routes, then I suppose there's nothing which forbids 
> it to
> > do so; but IMO it would be inferior to an implementation that can 
> advertise
> > only a single route. In at least one implementation there are ways to
> > achieve this.
>
>When the export attributes are the same for the original route and the
>locally imported route, I agree that it is a nice optimization to suppress
>the advertisement of the imported route. When they are different, however,
>the optimization does lead to constrains on vpn association, which IMO
>does not seem to be necessary or correct.

I don't think you've demonstrated a case where the behavior ends up being 
different.

(yet) another way to look at the problem. This started out with the VRF B 
on the same PE as VRF A. What if VRF B were on a different PE?

1. Should the system behave differently in that case? (principle of least 
surprise says 'no')
2. should that PE re-export the route which was imported into VRF B?






From exim@www1.ietf.org  Wed Jul 30 17:44:27 2003
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To: Dan Tappan <tappan@cisco.com>
Cc: marko.kulmala@tellabs.com, jsmith4112003@yahoo.co.uk, raszuk@cisco.com,
        l3vpn@ietf.org, enke@redback.com
Subject: Re: Advertising Routes to a PE 
In-Reply-To: Message from Dan Tappan <tappan@cisco.com> 
   of "Wed, 30 Jul 2003 17:31:06 EDT." <4.3.2.7.2.20030730172424.02884930@flask.cisco.com> 
Date: Wed, 30 Jul 2003 14:43:52 -0700
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Dan,

> Message-Id: <4.3.2.7.2.20030730172424.02884930@flask.cisco.com>
> Date: Wed, 30 Jul 2003 17:31:06 -0400
> To: Enke Chen <enke@redback.com>
> From: Dan Tappan <tappan@cisco.com>
> Subject: Re: Advertising Routes to a PE 
> Cc: marko.kulmala@tellabs.com, jsmith4112003@yahoo.co.uk,
> 	raszuk@cisco.com, l3vpn@ietf.org, enke@redback.com
> In-Reply-To: <20030730205532.71DA2979C1@popserv2.redback.com>
> References: <Message from Dan Tappan <tappan@cisco.com>
>  <4.3.2.7.2.20030730153233.029c0df0@flask.cisco.com>
> 
> At 01:55 PM 7/30/2003 -0700, Enke Chen wrote:
> > > The question is: with the above configuration, at the 2547 architectural
> > > level, how many copies of the route _need_ to be advertised? I claim that
> > > you get identical results advertising a single route as advertising both
> > > the original and the sourced route. That is, if the two routes are
> > > identical (which they will be by definition if the route in VRF A is
> > > imported into VRF B), and given the definition of RT in section 4.3.1 of
> > > draft-ietf-l3vpn-rfc2547bis-00, then advertising
> > >
> > > 1:1:x/x,  Label=L1, RT={ 100:100}
> > > 2:2:x/x, Label=L1, RT={100:100, 100:200}
> > >
> > > will produce exactly the same effect on a remote PE as advertising
> > >
> > > 1:1:x/x, Label=L1, RT={100:100, 100:200}
> >
> >It seems to me that there is a difference if there exists a customer on the
> >remote PE with the following attributes:
> >
> >         vrf C:  rd 3:3,  import 100:200, export 100:200
> 
> I don't see it. In that case C will end up importing the same route (i.e. 
> the packet will end up in the same place) either way.

I missed one point in your email:

    > 1:1:x/x, Label=L1, RT={100:100, 100:200}

You magically combined the RT of both 1:1:x/x and 2:2:x/x :-)

That is one way of doing it, and advertising the both is another way.
The result is equivalent on the remote PE.

> 
> >(In that case vrf B probably should have import: 100:100 100:200.)
> >
> > >
> > > So, architecturally only the latter is necessary. Now, if the only way for
> > > a particular  implementation to produce route with all desired RT sets was
> > > to advertise two routes, then I suppose there's nothing which forbids 
> > it to
> > > do so; but IMO it would be inferior to an implementation that can 
> > advertise
> > > only a single route. In at least one implementation there are ways to
> > > achieve this.
> >
> >When the export attributes are the same for the original route and the
> >locally imported route, I agree that it is a nice optimization to suppress
> >the advertisement of the imported route. When they are different, however,
> >the optimization does lead to constrains on vpn association, which IMO
> >does not seem to be necessary or correct.
> 
> I don't think you've demonstrated a case where the behavior ends up being 
> different.
> 
> (yet) another way to look at the problem. This started out with the VRF B 
> on the same PE as VRF A. What if VRF B were on a different PE?
> 
> 1. Should the system behave differently in that case? (principle of least 
> surprise says 'no')
> 2. should that PE re-export the route which was imported into VRF B?
> 

My answer is "no" in general (with the exeception of "local importing" that
we have been discussing"). Recursive importing adds too much complexity
with little gain.

-- Enke




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Enke,

> we have been discussing"). Recursive importing adds too much complexity
> with little gain.

Did you mean to say "recursive export" ? Or are we switching topics now
to talk about "recursive importing" :) ?

R.




From exim@www1.ietf.org  Wed Jul 30 17:57:28 2003
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Hi, Robert:

> Message-ID: <3F283E77.F582C546@cisco.com>
> Date: Wed, 30 Jul 2003 23:53:59 +0200
> From: Robert Raszuk <raszuk@cisco.com>
> To: Enke Chen <enke@redback.com>
> Cc: Dan Tappan <tappan@cisco.com>, marko.kulmala@tellabs.com,
> 	jsmith4112003@yahoo.co.uk, l3vpn@ietf.org
> Subject: Re: Advertising Routes to a PE
> References: <20030730214353.17B1815D3C1@popserv1.redback.com>
> Content-Type: text/plain; charset=us-ascii
> Content-Transfer-Encoding: 7bit
> 
> Enke,
> 
> > we have been discussing"). Recursive importing adds too much complexity
> > with little gain.
> 
> Did you mean to say "recursive export" ? Or are we switching topics now
> to talk about "recursive importing" :) ?

You got me, I meant "recursive export". Thanks for pointing this out.

-- Enke





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To: Enke Chen <enke@redback.com>
From: Dan Tappan <tappan@cisco.com>
Subject: Re: Advertising Routes to a PE 
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At 02:43 PM 7/30/2003 -0700, Enke Chen wrote:
>Dan,

...

>I missed one point in your email:
>
>     > 1:1:x/x, Label=L1, RT={100:100, 100:200}
>
>You magically combined the RT of both 1:1:x/x and 2:2:x/x :-)

It wasn't magic. My point was that there are ways to achieve the desired RT 
set w/o re-exporting a second route. That was what I meant by:


>>Now, if the only way for a particular  implementation to produce route 
>>with all desired RT sets was to advertise two routes, then I suppose 
>>there's nothing which forbids it to do so; but IMO it would be inferior 
>>to an implementation that can advertise only a single route.

I haven't yet seen a case where re-exporting is the most straightforward 
way to achieve a desired import policy, particularly when you take into 
account PE-connection-independence. And I can think of cases where it would 
produce the wrong result if applied in general.





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From: =?iso-8859-1?q?John=20Smith?= <jsmith4112003@yahoo.co.uk>
Subject: Re: Advertising Routes to a PE 
To: l3vpn@ietf.org
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Hi,

> It seems to me that there is a difference if there exists a customer on the
> remote PE with the following attributes:
> 
>         vrf C:  rd 3:3,  import 100:200, export 100:200
> 
> (In that case vrf B probably should have import: 100:100 100:200.)

Well i tried it a little differently. I made the configuration on the router attached to
the VRF like this.

!
ip vrf A
 rd 1:1
 route-target both 100:100
!
 ip vrf B
 rd 2:2
 route-target export 45:64
 route-target both 100:100
!
router bgp X
 bgp router-id x.y.z.w
 neighbor <IP_ADDR_PEER> remote-as X
!
 address-family vpnv4 unicast
 neighbor <IP_ADDR_PEER> activate
 exit-address-family
!

This router learns from VRF A and i see it importing these routes in its VRF B. But when
it needs to advertise to its PE router it only advertises (say 10.0.0.0/8)
1:1::10.0.0.0/8
with Route Targets 100:100

As per the discussion which i follow it should do it with the RTs 100:100 45:64

Isnt the current behaviour improper?

Regards,
John


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Date: Thu, 31 Jul 2003 12:11:00 +0200
From: Robert Raszuk <raszuk@cisco.com>
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To: John Smith <jsmith4112003@yahoo.co.uk>
CC: l3vpn@ietf.org, tappan@cisco.com, enke@redback.com
Subject: Re: Advertising Routes to a PE
References: <20030731100508.29044.qmail@web41804.mail.yahoo.com>
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John,

What are the reasons that make you think that explicitely exporting
routes from vrf A with RT 45:64 will not address the need in much more
clean and obvious way ? 

R.

> John Smith wrote:
> 
> Hi,
> 
> > It seems to me that there is a difference if there exists a customer on the
> > remote PE with the following attributes:
> >
> >         vrf C:  rd 3:3,  import 100:200, export 100:200
> >
> > (In that case vrf B probably should have import: 100:100 100:200.)
> 
> Well i tried it a little differently. I made the configuration on the router attached to
> the VRF like this.
> 
> !
> ip vrf A
>  rd 1:1
>  route-target both 100:100
> !
>  ip vrf B
>  rd 2:2
>  route-target export 45:64
>  route-target both 100:100
> !
> router bgp X
>  bgp router-id x.y.z.w
>  neighbor <IP_ADDR_PEER> remote-as X
> !
>  address-family vpnv4 unicast
>  neighbor <IP_ADDR_PEER> activate
>  exit-address-family
> !
> 
> This router learns from VRF A and i see it importing these routes in its VRF B. But when
> it needs to advertise to its PE router it only advertises (say 10.0.0.0/8)
> 1:1::10.0.0.0/8
> with Route Targets 100:100
> 
> As per the discussion which i follow it should do it with the RTs 100:100 45:64
> 
> Isnt the current behaviour improper?
> 
> Regards,
> John
> 
> ________________________________________________________________________
> Want to chat instantly with your online friends?  Get the FREE Yahoo!
> Messenger http://uk.messenger.yahoo.com/




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From: =?iso-8859-1?q?John=20Smith?= <jsmith4112003@yahoo.co.uk>
Subject: LOcally Imported Routes?
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Dan et. al,

From: "Dan Tappan" <tappan@cisco.com>
 
> Look at it another way. Let's say the configuration is you hypothesize, 
> maybe as below:
>   ip vrf A
>    rd 1:1
>    route-target both 100:100
>   !
>   ip vrf B
>    rd 2:2
>    route-target both 100:100
>    route-target export 100:200
> !

[clipped]
 
> 1:1:x/x,  Label=L1, RT={ 100:100}
> 2:2:x/x, Label=L1, RT={100:100, 100:200}
> 
> will produce exactly the same effect on a remote PE as advertising
> 
> 1:1:x/x, Label=L1, RT={100:100, 100:200}

BUt Robert in one of his previous mails said
 
> Yes this is correct :). Advertising of locally imported routes should
> not be allowed.

This means that we should not advertise RT 100:200

And i happen to concur with Robert on this as AFAIK locally imported or redistributed
routes are not re-advertised by BGP (as said by Robert). 

Regards,
JOhn



 
 


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From: =?iso-8859-1?q?John=20Smith?= <jsmith4112003@yahoo.co.uk>
Subject: RE: Advertising Routes to a PE
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Robert,
 
> What are the reasons that make you think that explicitely exporting
> routes from vrf A with RT 45:64 will not address the need in much more
> clean and obvious way ? 

I just want to clear it conceptually. 

Moreover i am sure we can have a configuration wherein this could be possible.

So what will be done finally? Will we announce just 1:1:10.0.0.0/8 with RT 100:100 or
would the RT be 100:100 45:64

Regards,
John



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I think that conceptually the route distribution should be similar than=20
it would be if VRF B resides in different PE. In that case the given=20
route would not end up into VRFs that have import RT 45:64.

So, I think that route should be advertised only with RT 100:100.

Marko

> -----Original Message-----
> From: jsmith4112003@yahoo.co.uk [mailto:jsmith4112003@yahoo.co.uk]
> Sent: 31. hein=E4kuuta 2003 13:19
> To: jsmith4112003@yahoo.co.uk; l3vpn@ietf.org
> Subject: RE: Advertising Routes to a PE
>=20
>=20
> Robert,
> =20
> > What are the reasons that make you think that explicitely exporting
> > routes from vrf A with RT 45:64 will not address the need=20
> in much more
> > clean and obvious way ?=20
>=20
> I just want to clear it conceptually.=20
>=20
> Moreover i am sure we can have a configuration wherein this=20
> could be possible.
>=20
> So what will be done finally? Will we announce just=20
> 1:1:10.0.0.0/8 with RT 100:100 or
> would the RT be 100:100 45:64
>=20
> Regards,
> John
>=20
>=20
>=20
> ______________________________________________________________
> __________
> Want to chat instantly with your online friends?  Get the FREE Yahoo!
> Messenger http://uk.messenger.yahoo.com/
>=20
>=20

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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
The information contained in this message may be privileged=20
and confidential and protected from disclosure.  If the=20
reader of this message is not the intended recipient, or an=20
employee or agent responsible for delivering this message to=20
the intended recipient, you are hereby notified that any=20
reproduction, dissemination or distribution of this=20
communication is strictly prohibited. If you have received=20
this communication in error, please notify us immediately by=20
replying to the message and deleting it from your computer.

Thank you.
Tellabs
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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From: =?iso-8859-1?q?John=20Smith?= <jsmith4112003@yahoo.co.uk>
Subject: RE: Advertising Routes to a PE
To: l3vpn@ietf.org
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Makes sense. But this goes against what Tappan and Enke have been saying =
all along.

----- Original Message -----=20
From: <marko.kulmala@tellabs.com>
To: <jsmith4112003@yahoo.co.uk>; <l3vpn@ietf.org>
Sent: Thursday, July 31, 2003 4:00 PM
Subject: RE: Advertising Routes to a PE


I think that conceptually the route distribution should be similar than=20
it would be if VRF B resides in different PE. In that case the given=20
route would not end up into VRFs that have import RT 45:64.

So, I think that route should be advertised only with RT 100:100.

Marko

> -----Original Message-----
> From: jsmith4112003@yahoo.co.uk [mailto:jsmith4112003@yahoo.co.uk]
> Sent: 31. hein=E4kuuta 2003 13:19
> To: jsmith4112003@yahoo.co.uk; l3vpn@ietf.org
> Subject: RE: Advertising Routes to a PE
>=20
>=20
> Robert,
> =20
> > What are the reasons that make you think that explicitely exporting
> > routes from vrf A with RT 45:64 will not address the need=20
> in much more
> > clean and obvious way ?=20
>=20
> I just want to clear it conceptually.=20
>=20
> Moreover i am sure we can have a configuration wherein this=20
> could be possible.
>=20
> So what will be done finally? Will we announce just=20
> 1:1:10.0.0.0/8 with RT 100:100 or
> would the RT be 100:100 45:64
>=20
> Regards,
> John



________________________________________________________________________
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To: John Smith <jsmith4112003@yahoo.co.uk>
From: Dan Tappan <tappan@cisco.com>
Subject: Re: LOcally Imported Routes?
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At 11:15 AM 7/31/2003 +0100, John Smith wrote:
>Dan et. al,
>
>From: "Dan Tappan" <tappan@cisco.com>
>
> > Look at it another way. Let's say the configuration is you hypothesize,
> > maybe as below:
> >   ip vrf A
> >    rd 1:1
> >    route-target both 100:100
> >   !
> >   ip vrf B
> >    rd 2:2
> >    route-target both 100:100
> >    route-target export 100:200
> > !
>
>[clipped]
>
> > 1:1:x/x,  Label=L1, RT={ 100:100}
> > 2:2:x/x, Label=L1, RT={100:100, 100:200}
> >
> > will produce exactly the same effect on a remote PE as advertising
> >
> > 1:1:x/x, Label=L1, RT={100:100, 100:200}
>
>BUt Robert in one of his previous mails said
>
> > Yes this is correct :). Advertising of locally imported routes should
> > not be allowed.
>
>This means that we should not advertise RT 100:200

That's not what Robert meant. He said one should not re-advertise the route 
which is imported into VRF B. That is not the same as saying that one 
shouldn't give the operator mechanisms to mark routes with the appropriate 
policy. That is, if the route distribution policy that is required to 
support the desired VPN connectivity requires that a route be exported with 
both RT's 100:100 and 100:200, then an implementation should provide a 
mechanism to do so.

Recursive export would be a way to provide that mechanism, but it's a 
pretty crude one, which doesn't solve all problems and is inappropriate in 
some connectivity scenarios. Consider, for example, the case where you have 
3 sites: A, B, C. Both A and C should be able to talk to B, but A and C 
should not communicate directly. Recursive export of routes imported into B 
would break that policy.

Not to mention that applying recursive export blindly would result in an 
explosion of routing information.

So, even if an implementation provided recursive export, it shouldn't be 
the default behavior.

>And i happen to concur with Robert on this as AFAIK locally imported or 
>redistributed
>routes are not re-advertised by BGP (as said by Robert).
>
>Regards,
>JOhn
>
>
>
>
>
>
>
>________________________________________________________________________
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Date: Thu, 31 Jul 2003 08:49:31 -0400
To: John Smith <jsmith4112003@yahoo.co.uk>
From: Dan Tappan <tappan@cisco.com>
Subject: RE: Advertising Routes to a PE
Cc: l3vpn@ietf.org
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At 12:17 PM 7/31/2003 +0100, John Smith wrote:

>Makes sense. But this goes against what Tappan and Enke have been saying 
>all along.

I think you may be misinterpreting what I said - and maybe it's my fault 
for not being more explicit. When I said (several messages back):

>1:1:x/x,  Label=L1, RT={ 100:100}
>2:2:x/x, Label=L1, RT={100:100, 100:200}
>
>will produce exactly the same effect on a remote PE as advertising
>
>1:1:x/x, Label=L1, RT={100:100, 100:200}

I was _not_ trying to imply that an implementation should scan the 
importing VRFs and apply the union of all export RTs to the advertised 
routes. That behavior would have some of the same faults as recursive export.

_All_ I'm saying is that:
- architecturally 2547 never requires advertising more than one route to 
achieve a desired connectivity (considering only the RT mechanism). ALl it 
requires is that routes be associated with an appropriate set of RTs.

- an implementation should provide a mechanism to apply the appropriate set 
of RTs to a route. VRF export lists are not the only acceptable mechanism. 
In fact if you read rfc2547 carefully you'll find that it doesn't even 
mention VRF export lists.

- recursive export is neither necessary or sufficient, and can be actively 
harmful.

So, if we get back to the original question, the answer is: "No. An 
implementation which does not do recursive export is not behaving incorrectly".

I'm continually amazed at how much effort it takes to answer a simple 
question on an IETF list.

>----- Original Message -----
>From: <marko.kulmala@tellabs.com>
>To: <jsmith4112003@yahoo.co.uk>; <l3vpn@ietf.org>
>Sent: Thursday, July 31, 2003 4:00 PM
>Subject: RE: Advertising Routes to a PE
>
>
>I think that conceptually the route distribution should be similar than
>it would be if VRF B resides in different PE. In that case the given
>route would not end up into VRFs that have import RT 45:64.
>
>So, I think that route should be advertised only with RT 100:100.
>
>Marko





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From: =?iso-8859-1?q?John=20Smith?= <jsmith4112003@yahoo.co.uk>
Subject: RE: Advertising Routes to a PE
To: Dan Tappan <tappan@cisco.com>
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> I was _not_ trying to imply that an implementation should scan the 
> importing VRFs and apply the union of all export RTs to the advertised 
> routes. That behavior would have some of the same faults as recursive export.

This makes it very clear :-)

> 
> _All_ I'm saying is that:
> - architecturally 2547 never requires advertising more than one route to 
> achieve a desired connectivity (considering only the RT mechanism). ALl it 
> requires is that routes be associated with an appropriate set of RTs.

Very True.

> So, if we get back to the original question, the answer is: "No. An 
> implementation which does not do recursive export is not behaving incorrectly".

This is what i wanted to know !!

> I'm continually amazed at how much effort it takes to answer a simple 
> question on an IETF list.

:-)

Thanks,
John

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Date: Thu, 31 Jul 2003 19:11:03 +0200
From: Robert Raszuk <raszuk@cisco.com>
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To: Routing Discussion <routing-discussion@ietf.org>, L3VPN <l3vpn@ietf.org>
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Let me try to probe operators about one element which may become much
harder to achive when moving some data out of BGP umbrella. Under a
numerous conversations I have heard requests asking for allowing
operator to tightly control the order of information being distributed
by BGP for example: vpnv4 routes first then ipv4 routes or ipv4 routes
first followed by mutlicast routes etc ...

When all AFs are under the same BGP umbrella that request can be very
easy to deliver with a simple knob. When we separate future - non
routing data - I could easily see the case that +100K ipv4 routes is
competing with +100K telefon numbers to be send between routers. There
would be no easy way to allow priority control other then low level CPU
resources allocations to each process. Even that it would be usually
difficult to achive full task serialization on a more granular level
that fully blocking given's process resources. That will in turn result
in explosion of separate processes almost per task and managment of
those will for sure provide very stable platforms :).

Bottom line - the question is - do we all agree that the only required
mode of operation is fairness in distribution of all kinds of
information between routers ? 

Cheers,
R.




