[SIPForum-discussion] Sip Proxy Server

[Priyankam]

> Hi,
> 
>   we have a confusion regarding loop detection by proxy server. As per the
> RFC 3261 we create key for branch parameter using , To tag, From tag,
> Call-ID header
> field, the Request-URI of the request received (before translation), the
> topmost Via header, and the sequence number from the CSeq header field.
> 
> But the confusion is if the request traverses through several proxies and
> the same request comes back to the previous proxy, the top most via gets
> changed,
> so the Key generated will be different, hence loop detection is not
> possible.
> 
> Please suggest a solution for this issue.
> 
> Regards,
> Priyankam
> Tata Elxsi Ltd.
> Bangalore

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