[SR-Users] Kamailio ICSCF strange forking

[DURECU, OLIVIER (OLIVIER)]

Hi all,

I have deployed an IMS based on Kamailio 4.1.2 and I don't manage establishing a call.

Users registration is OK but when I initiate the call from A at ims.net to B at ims.net, I notice a strange I-CSCF behavior

The INVITE message goes OK from P-CSCF to S-CSCF then to I-CSCF. Till this point everything is fine...
Then the I-CSCF performs its LIR diameter request and gets an Ok response from the HSS with a S-CSCF URI
The I-CSCF forwards the INVITE at the received S-CSCF.

BUT at the same time the I-CSCF generates a DNS request to resolve ims.net SIP SRV (it gets itself as answer...) and forwards a second INVITE (exact copy from the one sent to the S-CSCF) to itself

So I have 2 copies of the same INVITE dialog travelling in the network and messing everything.

Any idea of the cause of this behavior .

Thanks for your support...

Olivier


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