[SIPForum-discussion] SIP messages route

[Steve Parrish]

If you're talking about SIP endpoints that span subnets I would say it's
not very common at all due to NAT/firewall traversal.  Also with the
increasing number of SBC's (Session Border Controllers) being deployed I
would say that Service Providers force SIP traffic to hop along these
nodes.
 
Does the protocol they use influence this behavior?
Not really, there's no guarantee since the connection could be part UDP
and part TCP.
 
-Steve P.
 
 
-----Original Message-----
From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Nir Katz
Sent: Wednesday, March 28, 2007 10:38 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] SIP messages route
 
How common is the scenario where the UAC and UAS sends SIP messages to
one another directly after they have established the dialog and started
media exchange? Or do most UAs continue to send the SIP messages using
the same route they came from?   Does the protocol they use influence
this behavior?
 
Thanks in advance
 
Nir Katz
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