RFC 3261, the fourth paragraph of section 16.1 has the
following sentence:
"Requests forwarded
between different types of transports where the proxy's TU must take
an active role in ensuring reliable delivery on one of the transports
MUST be forwarded transaction statefully."
Regards, Peter P�.
Ravi Shiroor wrote:
i am not able to locate this information in the RFCs.
can anybody please point out where it is mentioned, that a
stateless proxy should not use a unreliable transport for
outgoing messages if the incoming message is on a reliable
transport?
thanks,
ravi.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Paul Kyzivat
Sent: Wednesday, January 08, 2003 1:49 AM
To: Duffy Boyle
Cc: [EMAIL PROTECTED]
Subject: Re: [Sip-implementors] SIP retransmission timer needed for TCP?
I believe the answer is that a stateless proxy must not forward from
TCP to UDP. It requires a transaction stateful proxy precisely so it
can be responsible for the retransmissions.
Paul
Duffy Boyle wrote:
> Dear Implementors,
> If a SIP UA sends a message to a stateless proxy using TCP, and
> the proxy forwards to the destination UA with UDP, and the
> message gets lost on the UDP path, who sets the message
> retransmission timer to resend the message?
> > I'd guess it's not in the stateless proxy, so it would have to
> be in the originating UA, but RFC3261 speaks to these timers
> only for UDP transport.
> > Thanks in advance for guidance,
> > Duffy Boyle
> [EMAIL PROTECTED]
--
Dr. Peter P�ppinghaus
Siemens AG | Phone: +49 89 - 722 40065
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