[SIPForum-discussion] Need suggestion

[SYED IQBAL Ali]

Hi CaoSam,

If both call legs are different(call id's are different) than also can't we
use the same branch parameter?

Thanks,
Syed

On Fri, Jan 4, 2013 at 1:39 PM, CaoSam <yortion at hotmail.com> wrote:

> SYED,
>
> My answer is "NO". Please refer to section 8.1.1.6 of RFC 3261,"This
> parameter is used to identify the transaction created by that request.
> This parameter is used by both the client and the server.". Branch
> parameter can be taken as transaction identifier.
>
> Sam
>
>
>  ------------------------------
> Date: Sun, 23 Dec 2012 01:49:28 +0530
> From: s.iqbalali2005 at gmail.com
>
> To: discussion at sipforum.org
> Subject: [SIPForum-discussion] Need suggestion
>
>  Hi i have a question about branch parameter in Via header for below
> scenarios.
>
>
>
>
>
> Scenarios:
>
> 1)
>
> OPTIONS sip:user1 at Server_IP SIP/2.0
>
> Via:SIP/2.0/UDP Client_IP:9080;branch=z9hG4bKABC
>
> Call-ID: Call_ID1 at Client_IP:9080
>
> From: <sip:user1 at Client_IP:9080>;tag=1000000-0-803298131-9080
>
> To: <sip:user1 at Server_IP:5060>
>
> CSeq: 1 OPTIONS
>
> Content-Length: 0
>
> Contact: <sip:user1 at Client_IP:9080>
>
> Max-Forwards: 70
>
>
>
> ====================
>
> 2)
>
> OPTIONS sip:user2 at Server_IP SIP/2.0
>
> Via:SIP/2.0/UDP Client_IP:9080;branch=z9hG4bKABC
>
> Call-ID: Call_ID2 at Client_IP:9080
>
> From: <sip:user2 at Client_IP:9080>;tag=1000000-0-803298131-9080
>
> To: <sip:user2 at Server_IP:5060>
>
> CSeq: 2 OPTIONS
>
> Content-Length: 0
>
> Contact: <sip:user1 at Client_IP:9080>
>
> Max-Forwards: 70
>
>
>
> 1) My question is can we use same branch parameter in both OPTIONS
> requests having different call ids or not?
>
>
>
> -Call ids are different for both request.
>
> -SIP URI is different for both call legs.
>
> - To and from headers are different for both scenarios.
> -Cseq are different in both cases.
>
> --
> SYED IQBAL ALI
>
> s.iqbalali2005 at gmail.com
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-- 
SYED IQBAL ALI
9379822020
s.iqbalali2005 at gmail.com
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