Hi!
Kamailio behaves correct in this trace and I couldn't spot an abvious
error in the trace.
Nevertheless there are 2 problems:
1. Asterisk Gateway does not receive/accept the ACK
2. Asterisk PBX does not retransmit ACK
reg. 1: ask the gateway operator if he sees the ACK in the Asterisk log,
and if yes the error message of Asterisk why this ACK is not accepted.
If the ACK is not seen in the Asterisk console then maybe it gets
dropped by a buggy firewall.
reg 2: login to your Asterisk PBX and verify if Asterisk receives the
200 OK, and maybe spot some log message why it does not trigger ACK
retransmissions.
regards
Klaus
Am 30.06.2010 23:33, schrieb Ole Kaas:
Den 30/06/2010 kl. 01.23 skrev Iñaki Baz Castillo:
2010/6/29 Ole Kaas<o...@tet.dk>:
Hi Klaus,
I've mailed pcap dump to you directly for further inspection.
Hi, it's much better if you capture a trace with "ngrep -Wbyline -t -q
port 5060" and paste it in a new mail by replacing your public IP's
with other values. Then all the people here could help you rather than
asking for private help to a specific member of the maillist.
You are right. But maybe it was something (obvious) that could be resolved
quickly and I could post an update here on the list. The original log was
inadequate - Klaus was a great help, with suggestions to obtain new log. So
here it is attached and anonymized with all ip addresses (and stuff) converted
to private adresses. The Kamailio server is multi homed and the two networks
are non-routable (I use rtpproxy to bridge media). Our Asterisk PBX is version
1.4.26.1 and the Asterisk Gateway is 1.6.1 (or 1.6.0 - cant remember and not
under my control). Kamailio is version 3.0.0.
Looking at the trace, it seems the problem starts with the ACK not being
received by the Asterisk Gateway which then resends the OK. The OK is relayed
back to the originating Asterisk PBX which seems to ignore the retransmission.
In fact it seems that Kamailio is routing and relaying the sip packets
correctly. However, it seems that the problem only exists between Asterisk and
Kamailio. I have other pbx'es (3CX) connecting to Kamailio and I have no
evidence that the problem happens with those. I have another trace where the
call comes from one of the Asterisk Gateways and is routed back to one of the
other Asterisk Gateways. The result is the same - the OK's are ignored by
Asterisk.
/Ole
_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
