It can also have a different path than the INVITE, if there are proxies that do not do record-route, so there can be less Via headers than in the INVITE.
By that I am wondering if the ACK relayed via tm module has the same Via branch as , expecting not to be. Maybe in the ACK for 300+ replies... Cheers, Daniel On 10.02.20 15:48, Yuriy Gorlichenko wrote: > ACK for successull response is a new transaction. It has to be > different. May be it is better to point provider to this? > > On Mon, 10 Feb 2020, 14:26 Sebastian Damm, <[email protected] > <mailto:[email protected]>> wrote: > > Hi, > > I stumbled upon an interop problem with a carrier. We have the > following scenario: > > Gateway --> Loadbalancer --> Carrier > > The loadbalancer generates a Via header for each request. But since it > is stateless, the Via tag is generated for each request. As a > consequence, the Via tag in the ACK differs from the one in the > INVITE. And one carrier doesn't handle those ACKs if the Via tag > differs. > > Is there a way to force the creation of a "deterministic" Via branch > tag? For example, building it from a hash over call-id and from-tag or > something like that? > > Thanks in advance > Sebastian > > -- > Sebastian Damm > Voice Engineer > __________________________________________ > sipgate GmbH > > _______________________________________________ > Kamailio (SER) - Users Mailing List > [email protected] <mailto:[email protected]> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users > > > _______________________________________________ > Kamailio (SER) - Users Mailing List > [email protected] > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - March 9-11, 2020, Berlin - www.asipto.com Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com
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