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, <damm(a)sipgate.de
<mailto: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
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