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, damm@sipgate.de 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
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