[SR-Users] Kamailio not increasing cseq

[Camila Troncoso]

Hi Daniel,



In deed the Ruri is the only difference with the second invite.

For the first Invite,  I received an “503 Service unavailable” from the
gateway , it goues trough the SBC and it is pass to the LCR so it reroutes
the call to the second gateway in the cloud.



I asked in FreeSWITCH forum for this issue and they said that the problem
is Cseq not increasing, Freeswitch doesn’t take Ruri as compare.



Regards,



Camila



*From:* sr-users-bounces at lists.sip-router.org [mailto:
sr-users-bounces at lists.sip-router.org] *On Behalf Of *Daniel-Constantin
Mierla
*Sent:* jueves, 21 de febrero de 2013 5:08
*To:* SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users
Mailing List
*Subject:* Re: [SR-Users] Kamailio not increasing cseq



Hello,

On 2/20/13 7:44 PM, Camila Troncoso wrote:

Hi all,



I’m working for a while with Kamailio+Freeswitch as SBC.



I have this structure:



* *

When I make a call from one client connected to LCR,  it is route to my SBC
and afterwards to his destiny in the cloud passing though a gateway. When
the destiny is unreachable, the LCR reroutes the call to another gateway.
Sometimes the LCR send this retry again to the SBC , because the second
gateway is also in the cloud, but when this happens, FreeSWITCH answer with
:

“482 Request merged” because it detects that is the same call.

This is because the second INVITE has the same Call-ID and same Cseq.
Kamailio *is not* increasing CSeq.



Is there a way to resolve this?

it is a second branch, the top via header of the second invite should have
a different branch parameter than the previous one. Freeswitch should
detect that and handle it as a separate branch of the call, too. Try
changing the r-uri a bit and see if works (e.g., set a prefix that you
remove it if set), as an workaround.

Also, is the CANCEL sent to Freeswitch for first branch? Or is Freeswitch
sending a negative reply?

Cheers,
Daniel



-- 

Daniel-Constantin Mierla - http://www.asipto.com

http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

Kamailio World Conference, April 16-17, 2013, Berlin

 - http://conference.kamailio.com -
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