RE: [Sip] Question about Poll: Proposal relating to keepalive, TCP, and UDP usage in draft-ietf-sip-outbound

["Brian Stucker" <bstucker at nortel.com>]

I agree.

> -----Original Message-----
> From: Erkki.Koivusalo at nokia.com [mailto:Erkki.Koivusalo at nokia.com] 
> Sent: Thursday, January 04, 2007 3:52 AM
> To: Stucker, Brian (RICH1:AR00); fluffy at cisco.com
> Cc: sip at ietf.org; Audet, Francois (SC100:3055)
> Subject: RE: [Sip] Question about Poll: Proposal relating to 
> keepalive, TCP, and UDP usage in draft-ietf-sip-outbound
> 
> Sorry, I was not clear enough for my formulation.
> The scope of my summary was the usage of SIP together with 
> Outbound, thus I simply meant this:
> 
> >May support UDP for Outbound
> 
> as a rewording of the original proposal:
> 
> > Proposal 2: Make outbound registrations over UDP flows optional for 
> > UAs.
> 
> Regards,
> 
> Erkki
> 
> >> -----Original Message-----
> >> From: Erkki.Koivusalo at nokia.com [mailto:Erkki.Koivusalo at nokia.com]
> >> Sent: Tuesday, January 02, 2007 1:41 AM
> >
> ><<snip>>
> >
> >> As a summary what that would mean in terms of deployments:
> >> 
> >> - Every Outbound compliant (UA or proxy) implementation MUST
> >>   support TCP but MAY support UDP too.
> >
> >May support UDP for Outbound, or may support UDP, period? Unless I'm 
> >missing something somewhere, section 18 of RFC-3261 still 
> says that all 
> >SIP elements MUST implement UDP.
> >
> >> 
> >> - It will be up to the deployment to select whether TCP or UDP
> >>   (or even both) shall be used for that specific deployment.
> >>   Supporting UDP only would have known limitations and it would
> >>   also mean that TCP-only implementations could not be used for
> >>   that deployment.
> >> 
> >> Erkki
> >
> 

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