Update: [Serusers] Is SER supposed to send ACK for 2xx response?

[C Y]

Hello.

Just an update on my previous post.

After reading section 16 in RFC3261, it looks like SER
is not supposed to send an ACK to a 2xx response (in
an INVITE dialog), since this ACK is supposed to be
generated by UAC core. 
A proxy (like SER) would not implement UAC core
functionality, even if it is in stateful mode.

So, it means that SER is behaving 'correctly' as
described below.

If anyone has noted otherwise, please share with me. 

Thanks!

C

--- C Y <bunnahnah2 at yahoo.com> wrote:

> Hello,
> 
> My setup is for an INVITE session is:
> 
> UAC ----> SER -----> UAS
> 
> I am using SER is a stateful forwarder (using
> t_relay). 
> I find that when my UAS sends a "200 OK" to my UAC
> (via SER), SER does not send an ACK to my UAS. 
> The 200 message is forwarded correctly to my UAC,
> but
> my UAC is taking quite some time to reply.
> Therefore, there is timeout, and my UAS is
> re-sending
> the 200 messages to SER (and SER just forward them
> on
> to my UAC).
> 
> My question is, is this correct behaviour?
> Or is SER supposed to ACK immediately a 200 message,
> before forwarding it to my UAC?
> 
> Thanks for any pointers!
> 
> Chee
> 
> 
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