[SR-Users] No retry on INVITE

[Allan Kristensen]

Hello Daniel,

Okay, so I had a look at the config and we do use the t_relay() for
customer facing proxy, so I was mistaken.

So I guess it's okay to reply 100 and then let kamailio handle the retry.
Question is, how do I get it to resend INVITE when there is no response to
the INVITE after a few seconds?
Is it a TM parameter or should I do it in the config script?

Thank you...
/Allan

On Mon, Oct 19, 2020 at 1:28 PM Daniel-Constantin Mierla <miconda at gmail.com>
wrote:

> Hello,
>
> if kamailio is stateless (ie., you do not use tm module, but forward() for
> sending out requests), then it will not do any retransmission and it is not
> sending 408 itself (likely received from downstream).
>
> With a stateless Kamailio, you should not send out 100 trying, but let
> upstream do retransmission if it is the case.
>
> Cheers,
> Daniel
> On 19.10.20 11:34, Allan Kristensen wrote:
>
> Hello,
>
> I'm trying to get Kamailio to retry INVITE.
>
> We have a Freeswitch which is sending INVITE to a sip user via Kamailio
> proxy using static ip/location.
> All is well, calls are flowing, but sometimes INVITE from kamailio to user
> is lost and no attempt to retry is occurring and so after 30 sec kamailio
> just returns 408 Request timeout.
>
> Call flow is like this:
>
> FS       Kamailio      User
> --- INVITE -->
> <-- 100 Trying
>             --- INVITE --->
>       (Waiting 30 secs)
> <-- 408 Timeout
> --- ACK --->
>
> So assume we have failed in handling retries somehow. Kamailio is running
> stateless, but other retries are working, so I assume this is not a problem?
>
> Can someone perhaps point us in the right direction on where to solve this?
>
> Kamailio is version 5.2.4
>
> Thank you...
> /Allan
>
>
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> --
> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
> Funding: https://www.paypal.me/dcmierla
>
>
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