Jeroen van Bemmel wrote:

Francois,

Refer to RFC3261 16.5: if a proxy is not responsible for the request URI it MUST NOT recurse on 302

It most certainly does not say that.

Perhaps you are referring to this text:

 A proxy MUST NOT add additional targets to the target set if the
   Request-URI of the original request does not indicate a resource this
   proxy is responsible for.

This is referring to the R-URI in the original INVITE, not the one in the contact in the 3xx.


416 does not have the right semantics (since the endpoint may in fact support sips, proxies currently should never generate this response)

WHy is that? Section 21.4.14 says nothing about UA vs. proxies. It talks about servers. I think 416 is not far off.

However to be honest we need to explicitly indicate that the problem was sips-to-sip so that the original UA can decide whether to retry. Thus I'd suggest a new 4xx code.

-Jonathan R.
--
Jonathan D. Rosenberg, Ph.D.                   600 Lanidex Plaza
Cisco Fellow                                   Parsippany, NJ 07054-2711
Cisco Systems
[EMAIL PROTECTED]                              FAX:   (973) 952-5050
http://www.jdrosen.net                         PHONE: (973) 952-5000
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