2011/6/9 Paul Kyzivat <pkyzi...@cisco.com>:
> For an unsupported/unrecognized transport, like sctp, 501 might be a
> reasonable choice.

It would be a good alternative usage of 501, I agree.




> It would be much better than 500 for that case. 500 could
> be used if its a *server* problem that you can't find anything better for,
> but like 400 its overly vague.

Ok.



> In the cases of inconsistency (sips with udp) the problem is with the
> request, not the server, and so a 4xx response is more appropriate.

Some proxies reply a custom 478 "Unresolvable Destination" in such
cases. I like it :)


> 503 is a terrible choice for any of these. It will cause the sender to back
> off on sending requests. Its really only for overload types of situations.

Agree. Thanks a lot.



-- 
Iñaki Baz Castillo
<i...@aliax.net>

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