[SR-Users] Failure Route Issue

Alex Balashov abalashov at evaristesys.com
Wed Apr 18 05:47:35 CEST 2018


Oh, you're referring to the end-to-end ACK following the 200 OK.

What is the Contact URI in the 200 OK received by the calling UA? Does
the domain portion reflect the "SIP service", or the "Media server"? Is
there a Record-Route set?

On Tue, Apr 17, 2018 at 11:41:14PM -0400, mack at dopensource.com wrote:

> Thanks for the info Alex!
> 
> But, I don’t seem to get that behavior.  My sngrep graphical flow located here: https://snag.gy/qMWfvk.jpg <https://snag.gy/qMWfvk.jpg> shows that Kamailio absorbs that negative ACK and then does an INVITE to the media server, which is what I want it to do (because I have a failure route defined)  But, 200 OK from the media server is being passed back to the UA and then the ACK from the UA is being sent to the SIP service versus the media server, which doesn’t make any sense to me.  I must be looking at this wrong.

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Alex Balashov | Principal | Evariste Systems LLC

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