RE: [Sip] MAJOR Open Issue #184: Message size limitations

["Drage, Keith (Keith)" <drage@lucent.com>]

Strictly speaking, there is no compatibility issue with this particular
requirement changing to a MUST. Compatibility does not equal existing
implementations are automatically compliant with new versions of
specification.

There are compatibility issues with what should a proxy/UAC do if it
receives this new response code, as presumably many existing RFC2543
implementations will be totally unable to use TCP/SCTP as an alternative to
UDP in this case.

Note also that the existing bis text does not mandate support of transport
protocols other that UDP at the moment, therefore there will also have to be
a change in the specification in the area of this requirement as well.

Keith

Keith Drage
Lucent Technologies
Tel: +44 1793 776249
Email: drage@lucent.com

> ----------
> From: 	Juha Heinanen[SMTP:jh@lohi.eng.song.fi]
> Sent: 	28 December 2001 17:18
> To: 	Scott  Bradner
> Cc: 	jdrosen@dynamicsoft.com; John.Hearty@level3.com; sip@ietf.org
> Subject: 	Re: [Sip] MAJOR Open Issue #184: Message size limitations
> 
>  > anyone who is concerned with reliability or with Internet congestion
>  > should also prefer "MUST use TCP for packets larger than 1500" - it
>  > will be hard to convince the IESG that it is OK for the Internet
>  > to not have this a MUST
> 
> scott,
> 
> i'm wasting too much bandwidth on this, but my point att the time has
> been that someone already has convinced IESG not to have MUST there,
> because it is SHOULD in rfc2543.  in some other occasions people on this
> list have said that iesg requires the bis to be backwards compatible
> with rfc2543, but looks like we are now relaxed from that obligation.
> 
> -- juha
> 
> 
> _______________________________________________
> Sip mailing list  http://www1.ietf.org/mailman/listinfo/sip
> This list is for NEW development of the core SIP Protocol
> Use sip-implementors@cs.columbia.edu for questions on current sip
> Use sipping@ietf.org for new developments on the application of sip
> 

_______________________________________________
Sip mailing list  http://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip