8 Jul
2010
8 Jul
'10
1:53 a.m.
Hey,
I do not do anything IP level forwarding. All my forwarding is done
using Kamailio. It looks like what I am doing is called hairpin routing.
Thanks,
David
On 2010-07-07 18:48, Timo Reimann wrote:
Hi,
David wrote:
I have setup two Kamailio servers, my INVITEs
will go through server A,
which forwards to server B which forwards it back to server A.
This is intential, the trouble is when the packet comes back through
server B, nothing has changed so TM sees it as a retransmission.
The difference between the first time through and the second time is the
port 5061 instead of 5060.
If you forward the INVITE from B to A SIP-wise (e.g., by calling
forward()) a new Via header should be added which prevents the spiraled
INVITE message from being considered a retransmission on A.
Do you perform forwarding on a lower level, like IP?
Cheers,
--Timo