Shail Bhatnagar wrote:

> vkg> Well, not quite.  It will forward one 487 if multiple of them are 
> vkg> received.  A proxy forwards multiple 401 and 407 responses, but it 
> vkg> should only forward one 487.
> 
> Is the above line a quote from one of Jonathan's email or
> somewhere in the bis draft ? ?

-02 bis, PDF version, page 86; see handling of 4xx,5xx responses.

> vkg> CANCEL is hop-by-hop (at least for stateful proxies), not end-to-end.
> 
> I knew about the hop-by-hop aspect of CANCEL, but thought
> that once a request is CANCEL(led), forwarding non-200 final
> response upstream does not make sense.

Nope; the non-2xx response has to be forwarded to that the UAC (and state- 
ful proxies) can clean up their INVITE transaction.  Unless you want to get 
Jonathan really mad, always remember:

   Each transaction completes independent of others

- vijay
-- 
Vijay K. Gurbani  vkg@{lucent.com,research.bell-labs.com,acm.org}
Internet Software and eServices Group 
Lucent Technologies/Bell Labs Innovations 263 Shuman Blvd., Rm 1A-413
Naperville, Illinois 60566     Voice: +1 630 224 0216   Fax: +1 630 713 0184
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