Update, manually modifying the To-Domain in ACK has fixed this, I saved the key value pair Call-ID/To-Domain of 200OK from CISCO and for corresponding ACK with same Call-ID modified the $td

same problem appeared in BYE for the call, again same fix by modifying the To-Domain for the same Call-iD in subsequent BYE.

QUESTION: Was this supposed to happen with mhomed Kamailio ? I have not observed this scenario with any provider/gateway other than this CISCO gw!

BR, Sammy.

On Tue, May 12, 2015 at 12:24 PM, SamyGo govoiper@gmail.com wrote:

Yeah sure, attached here is the trace from the CISCO logs. Not in pcap format. Also this is the flow of the call.

+-----------+ +--------------+ +------------------+ |Provider |+--------> +Kamailio +------>+CISCO IAD | +-----------+ +--------------+ +-----------------+ | ^ v | +-----------+ |Asterisk | +-----------+

Thanks and best Regards,

On Tue, May 12, 2015 at 11:50 AM, Alex Balashov <abalashov@evaristesys.com

...

wrote:

...

Is the UAC in this case a 2543 endpoint by chance? Can you send a complete SIP trace of the entire setup?

-- Alex Balashov | Principal | Evariste Systems LLC 303 Perimeter Center North, Suite 300 Atlanta, GA 30346 United States

Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

Sent from my BlackBerry. *From: *SamyGo *Sent: *Tuesday, May 12, 2015 11:46 *To: *SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List *Reply To: *Kamailio (SER) - Users Mailing List *Subject: *[SR-Users] Multi-homed Kamailio Modifies ACK

Hi all,

I'm having a scenario where I'm sending call to CISCO IAD2431. The call establishes with 200OK from CISCO and Kamailio sends back modified ACK. Cisco at this points gives out an error and sends 200OK again, Kamailio replies with ACK, and this cycle goes on until the call drops.

Here is the error from CISCO:

Failed FROM/TO Request check old_from: "Test Phone" sip:+14432232221@192.168.1.106;tag=as370915fc old_to: sip:+14444812211@sip.iamip.com:5041;tag=9FEC572E-100F new_from: "Test Phone" sip:+14432232221@192.168.1.106;tag=as370915fc new_to: sip:+14444812211@192.168.1.244:5041;tag=9FE

I've #auto_aliases=no

and, listen=udp:44.33.22.11:5041 listen=udp:192.168.1.244:5041

Kamailio sends INVITE through the Public IP to the CISCO gw, but decides to change the ACK header.

Any advise please.

Best Regards, Sammy.

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