[Serusers] Yet another ACK issue - sr-users

6 Apr 2005


      Hi all.
For some reason this ACK looped and I have no idea why. It's very suspicious 
that the Record-Route in the second ACK has a branch=0 tag.
NOTE: 10.3.0.221 http://10.3.0.221 is the IP of my ser proxy. It sits 
behind a Cisco 3600 so the IPs have been rewritten to
10.3.0.221http://10.3.0.221
.
Can anyone give a pointer?
Regards,
Paul
U 2005/04/05 21:06:29.459587 66.90.50.230:54115 http://66.90.50.230:54115-> 
10.3.0.221:5060 http://10.3.0.221:5060
ACK sip:8664365708@sipdev.mycompany.com SIP/2.0.
Via: SIP/2.0/UDP 172.16.1.42:5060 http://172.16.1.42:5060
;branch=z9hG4bK1177883239.
From: Paul Hazlett sip:3212514240@sipdev.mycompany.com;tag=1697105220.
To: sip:8664365708@sipdev.mycompany.com;tag=06922fcc.
Call-ID: 3209616113@172.16.1.42.
CSeq: 2301 ACK.
Content-Length: 0.
.
#
U 2005/04/05 21:06:29.692031 10.3.0.221:5060 http://10.3.0.221:5060 -> 
10.3.0.221:5060 http://10.3.0.221:5060
ACK sip:8664365708@sipdev.mycompany.com SIP/2.0.
Max-Forwards: 10.
Record-Route: <sip:10.3.0.221 http://10.3.0.221;ftag=1697105220;lr>.
Via: SIP/2.0/UDP 10.3.0.221 http://10.3.0.221;branch=0.
Via: SIP/2.0/UDP 172.16.1.42:5060 http://172.16.1.42:5060;received=
66.90.50.230 http://66.90.50.230;branch=z9hG4bK1177883239.
From: Paul Hazlett sip:3212514240@sipdev.mycompany.com;tag=1697105220.
To: sip:8664365708@sipdev.mycompany.com;tag=06922fcc.
Call-ID: 3209616113@172.16.1.42.
CSeq: 2301 ACK.
Content-Length: 0.
P-hint: Local Destination.