2011/4/22 Vijay K. Gurbani <[email protected]>:
> Unlike rfc2543 where a received 6xx was immediately
> forwarded, in rfc3261 this is not the case. A received
> 6xx response is not quarantined until all
> other branches have generated a final response.
I don't think so. From RFC 3261:
Sequential Search: In a sequential search, a proxy server attempts
each contact address in sequence, proceeding to the next one
only after the previous has generated a final response. A 2xx
or 6xx class final response always terminates a sequential
search.
[...]
Under the new rules, upon
receiving a 6xx, a proxy will issue a CANCEL request, which
will generally result in 487 responses from all outstanding
client transactions, and then at that point the 6xx is
forwarded upstream.
This is, from the UAC point of view, if no branch replies 200 and any
branch replies 6XX then the UAC will receive such 6XX.
--
Iñaki Baz Castillo
<[email protected]>
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