Re: [Sip] draft-kaplan-sip-session-id-00.txt

[Hadriel Kaplan <HKaplan at acmepacket.com>]

> -----Original Message-----
> From: sip-bounces at ietf.org [mailto:sip-bounces at ietf.org] On Behalf Of Paul
> Kyzivat
> Sent: Wednesday, December 03, 2008 1:30 PM
>
> If a B2BUA (B) is doing 3pcc:
>
>                  |------ C
>                  |
>         A ------ B
>                  |
>                  |------ D
>
> and it first connects A to C, and later transfers the call to D, will A
> and C and D all have the same Session-Id?

Yes, under the current model it would.  It's not a necessary scenario to have the same Session-ID, IMO, but it's covered that way. (but clearly the remote-tag would not match if D sent a Subscribe to A)


> Then take same picture, but make B be a conference focus, to which A, C
> and D are all connected. Will they ever have the same Session-Id?

As currently defined no, it would not.  I talked to some people about that at the IETF meeting, and they thought that was the right thing to do, as do I; but we couldn't define a textual explanation of what properties made that right.


> Also, how are dialog event packages supposed to work? Is it expected
> that they will be extended to contain Session-Ids?

Yes.  As an optional XML element update to them, which only gets used for matching if the call-id element did not match.

-hadriel
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