Subject: RE: [Sigtran] M3UA IG v04

From: "Zannin, Francois" <[email-masked]>
Date: Thu, 10 Jul 2003 11:33:56 +0200

Javier,

See comment inline,

Regards,

Francois Z.

-----Original Message-----
From: J.Javier Pastor (EE/EEM) [mailto:[email-masked]] 
Sent: Thursday, July 10, 2003 10:49 AM
To: Zannin, Francois; Ken Morneault; [email-masked]
Subject: RE: [Sigtran] M3UA IG v04

Hi Francois, 

Pls see below....

Cheers // Javier.

> -----Original Message-----
> From: Zannin, Francois [mailto:[email-masked]]
> Sent: miércoles, 09 de julio de 2003 16:21
> To: Ken Morneault; J.Javier Pastor (EE/EEM); [email-masked]
> Subject: RE: [Sigtran] M3UA IG v04
> 
> 
> Ken,
> 
> My point of view on he question, see hereafter.
> 
> Regards,
> 
> Francois Z.
> 
> -----Original Message-----
> From: Ken Morneault [mailto:[email-masked]]
> Sent: Wednesday, July 09, 2003 3:56 PM
> To: Zannin, Francois; J.Javier Pastor (EE/EEM); [email-masked]
> Subject: RE: [Sigtran] M3UA IG v04
> 
> 
> Francois,
> 
> Pls see comments below.
> 
> Regards,
> 
> Ken
> 
> At 10:15 AM 7/9/2003 +0200, Zannin, Francois wrote:
> >Just some comment about the M3UA IG v04
> >
> >3.21 NOTIFY messages are missing in Examples section
> >Figure (section 5.1.2)
> >        a NOTIFY(AS-INACTIVE) must be sent from SGP to ASP2
> after the
> >ASP Up Ack
> >
> >Figure (section 5.1.3)
> >        a NOTIFY(AS-INACTIVE) must be sent from SGP to ASP2
> after the
> >ASP Up Ack
> >
> >Figure (section 5.1.4)
> >        Same remark, the Notify is sent to ASP1, ASP2 and
> also need to
> >be sent to
> >      ASP3 after the ASP Up Ack
> 

# It is sent at that point because n=2 for that particular example. I.e. when 2 ASPs reach the ASP-INACTIVE state, # the AS is considered in AS-INACTIVE state.

I can understand that SG(p) can hold the Notification while there are not enough ASP UP to operate the minimum "n" ASP potentially ready to "Activate" the AS. But if the AS is still not Active when another ASP becomes "UP", a do not see any reason not to send it the current state "inactive" for the AS.

If we look in the RFC, it is in charge of the ASP to coordonate the activation of the AS. The SG cannot decide which ASP have to send the ASP-Active for a particular AS (by holding back the notify to other ASP).

RFC 3332
  4.3.4.3 ASP Active Procedures
   ...
   For the n+k redundancy case, ASPs which are in that AS should
   coordinate among themselves the number of active ASPs in the AS, and
   should start sending traffic only after n ASPs are active.
   ... 

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