Subject: PPPEXT WG minutes from Washington, D.C.

From: Matt Holdrege <[email-masked]>
Date: Thu, 11 Dec 1997 13:48:00 -0800

Here are the minutes from the two PPPEXT WG sessions earlier this week. Any
mistakes or misinterpretations are my own. Please report any issues to the
list.

PPP Extensions Working Group Minutes
Monday, December 08, 1997, Tuesday, December 9th, 1997.
Minutes - Matt Holdrege - [email-masked]
Chair - Karl Fox - [email-masked]

The PPP Triple-DES Encryption Protocol (3DESE)
Draft-ietf-pppext-3des-encrypt-00.txt
Sent to IESG on Dec. 3rd. Informational RFC

PPP over AAL5
draft-ietf-pppext-aal5-03.txt
Draft Status
Last Call until Dec. 10th
Andy Malis and George Gross discussed LLC encapsulation. No resolution.

PPP over FUNI
draft-ietf-pppext-funi-03.txt
Draft Status
Last Call until Dec. 10th

PPP LCP Extensions
draft-ietf-pppext-lcpext-ds-02.txt
Draft Status
Sent to IESG

PPP LCP CallBack
draft-ietf-pppext-callback-ds-01.txt
Call for Interoperability Experience

PPP LCP Self Describing Padding
draft-ietf-pppext-padding-ds-00.txt
Call for Interoperability Experience
No one has claimed to have implemented this protocol.

Multi-link Multi-node PPP
Draft-ietf-pppext-mmp-discovery-00.txt
Gary Malkin - [email-masked]
Gary discussed certain points of his draft.
Mechanism needed to randomize the bundle head.
The point was brought up that different vendors handle LCP negotiation
differently and remote peers may have difficulties.
Security was brought up since a big denial of service hole exists. Packets
need to be authenticated to prevent this.
Multicast should be required for efficiency. IANA would need to issue a
multicast number.

Next CIUG Interoperability Workshop
Week of February 23rd
Anita Freeman - [email-masked]
Park Plaza Motel  - San Francisco
Fee of $300 per person.
EAP, CCP, BACP and L2TP will be tested. 

PPP Consistent Overhead Byte Stuffing (COBS)
Draft-ietf-pppext-cobs-00.txt
James Carlson - [email-masked]
Stuart Cheshire - [email-masked]
Stuart presented his draft. There are no intellectual property restrictions
(patents) for COBS.

L2TP MIB
Draft-ietf-pppext-l2tp-mib-01.txt
Pat Calhoun - [email-masked]
Pat presented his draft.

L2TP Security Extensions for Non-IP networks
Draft-ietf-pppext-l2tp-sec-02.txt
Pat Calhoun - [email-masked]
Many changes were to simplify the implementation.

L2TP
Draft-ietf-pppext-l2tp-08.txt
Mark Townsley - [email-masked]
Congestion Control will be clarified in draft -09 which will be out before
the end of 1997. The next interoperability workshop in February will be
based on draft -09.
Should sequence numbers be MUST or SHOULD? Mark will put text in the next
draft for MUST but allow for it to be administratively disabled.

L2TP Header Compression
Draft-ietf-pppext-l2tphc-00.txt
Mark Townsley - [email-masked]
Mark described the draft and answered questions.

L2TP Alternate Data Channel
Draft-ietf-pppext-l2tpadc-00.txt
Bill Palter - [email-masked]
Bill presented his draft.

Securing L2TP using IPSEC
Draft-ietf-pppext-l2tp-security-00.txt
Baiju Patel - [email-masked]
Baiju presented his draft.
ISAKMP/Oakley for authentication and key management. IPSEC ESP for
protection of traffic. Integrity using ESP with NULL encryption.
Confidentiality using ESP with DES (or others).
The objective is to provide adequate protection for L2TP control traffic.
Integrity is MUST. Confidentiality is SHOULD. Provide protection for L2TP
data traffic. Integrity is SHOULD. Confidentiality is MAY. For L2TP over
non-IP networks, non-IP networks must transport packets. They must carry
UDP packets of ISAKMP/Oakley in band or out of band (need to specify in
media specific document). Carry ESP payload (no need for IP header). Next
header of ESP is 0 (or we can require a new protocol type). In summary, one
protocol for securing L2TP traffic over IP and non-IP networks. Proven
solution. Must comply with this document to claim L2TP security requirement
compliant implementation.
Pat Calhoun said that Ipsec shouldn't be mandated for non-ip.
Some questioned that this method is a proven solution.
Bill Simpson said that null ESP may not be desirable.

RTP Compression 
Carsten Borman - Steve Casner
Changes suggested in Munich have been made.
Minutes said request would be approved if no objections.
They have a set of numbers to propose and are seeking approval.
FULL_HEADER			0061
COMPRESSED_TCP		0063
COMPRESSED_NON_TCP	0065
COMPRESSED_UDP_8		0067
COMPRESSED_RTP_8		0069

COMPRESSED_TCP_NODELTA	8063
CONTEXT_STATE		8065
COMPRESSED_UDP_16		8067
COMPRESSED_RTP_16		8069

ISSLOW also requests LCP options, 25 Multilink Header Format (different
from 18 as it has a parameter), 26 Prefix elision option

I	draft-ietf-issll-isslow-02.txt 	(In WG last call)
PS	draft-ietf-issll-isslow-mcml-02.txt	(In WG last call)
PS	draft-ietf-issll-isslow-rtf-02.txt	(to go to WG last call after IETF)

Bill Simpson said to use the 8000 range rather than 2000.
Craig Fox said that the 4000 range would be better to handle old code.
8000 range was the rough consensus.

PPP EAP TLS Authentication Protocol
draft-ietf-pppext-eaptls-02.txt
Bernard Aboba <[email-masked]>
Bernard discussed the draft.
Bill said that EAP doesn't have a good match as a key negotiation protocol.
Bill is against fragmentation here.
This will be taken to the list.

PPP with Framing Conversion
draft-ietf-pppext-conversion-00.txt
Bill Simpson <[email-masked]>
This is to cover async/sync converters.
Recommended to go forward as BCP.

PPP in Frame Relay
draft-ietf-pppext-framerelay-ds-00.txt
Bill Simpson <[email-masked]>
Same as RFC 1973 except it adds a reference to frame conversion.
Need to get a list of implementers to advance to draft standard. Cisco and
Ascend were noted as the only current implementers present.

PPP in X.25
draft-ietf-pppext-x25-ds-00.txt
Bill Simpson <[email-masked]>
Simplification of wording in current RFC.
Bill will ask on the list for implementations.
PPP for Asynchronous PAD to Synchronous X.25 access
draft-rfced-info-khana-01.txt
Bill Simpson <[email-masked]>
Bill said this work should fall under the domain of the ITU since it
involves ITU numbers.
Bill said details of PPP through PAD's should be handled as an appendix to
the PPP in X.25 RFC.
Bill also suggested that we submit this to the ITU Study Group 7.

PPP EAP KEA Public Key Authentication Protocol
Draft-ietf-pppext-eapkea-01.txt
Jim Zmuda - [email-masked]
Pat Calhoun raised a possible IBM patent issue.

PPP Certificate Exchange Protocol
Draft-ietf-pppext-crtxcgh-01.txt
Jim Zmuda - [email-masked]
Bernard asked why anyone would use EAP if they had this protocol.

PPP Fortezza Encryption Encapsulation Protocol
Draft-ietf-pppext-feep-01.txt
Jim Zmuda - [email-masked]
Fortezza is currently classified. Bill Simpson said that ISAKMP was
originally designed for Fortezza and that we should use ISAKMP rather than
Fortezza. Jim said he would look into it.