Forum Discussion
Sanjay_81355
Nimbostratus
NimbostratusCall ID based persistence for SIP sessions
Hello,
We are using the F5 LTM for load balancing SIP traffic and we would like to use Call Id based persistence to make sure all SIP messages with the same call Id go to the same server. However we noticed that the persisteance is really based on the combination of call-Id+source IP address and not call-ID alone. How do we make it based on call-ID alone?
This is the scenario: there are 2 end-points X and Y that are sending SIP messages to the LTM for the same call-ID. The load balanced backend pool has 2 servers A and B. What I am noticing is that even though the call-ID in the SIP messages is the same some SIP messages go to A and others go to B just because the source was different (X vs Y).
San
- Chris_Miller
Altostratus
The "Configuring SIP Persistence" section of the doc below seems quite useful:
http://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm_configuration_guide_10_1/ltm_persist_profiles.html1192268
Seems like you simply need to create a SIP persistence profile and change the "SIP Info" dropdown to "Call-ID." Or, is that what you're already using? If you're already using that, perhaps using the "To" option to persist on the destination might be proper? Also, I'd suggest raising a support case so F5 knows that the SIP persistence profile isn't working as you'd expect. 
mhersh_136913Sanjay, I am having the same problem. Did you ever find a solution to this? thanks, matt
Eric_03_138831Same issue here. Was anyone able to solve?
- mhersh_136913
Hi Eric, I created a UPD profile with timeout set to immediate, which then forced the SIP persistence profile with Call_ID selected and set to 5400 seconds.(our max call length)
Sorry, I'm in the weeds right now, but if you send me details of what you are are doing, I can most likely help you out with this. thanks, matt
- Eric_03_138831
Hey Matt. I couldn't find your email address in your profile, and I don't think these forums have PM. If you want to drop me a line at eric (dot) paul (at) scratchwireless (dot) com I can describe our env.
Thanks for the quick reply!!
