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@ims.net to B@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