[SR-Users] No retry on INVITE

[Allan Kristensen]

Hello,

Okay, so I just found out retransmissions are actually working fine, but
siptrace doesn't send them to the trace server, only initial invite is sent.

My bad, thanks for the help.
/Allan



On Mon, Oct 19, 2020 at 7:19 PM Henning Westerholt <hw at skalatan.de> wrote:

> Hello,
>
>
>
> not sure if I understand it correctly, If you are t_relay() the INVITE to
> the new destination Kamailio should take care of the re-transmits of the
> INVITE automatically until it receives a provisional reply or fr_timer.
>
>
>
> Cheers,
>
>
>
> Henning
>
>
>
> --
>
> Henning Westerholt – https://skalatan.de/blog/
>
> Kamailio services – https://gilawa.com
>
>
>
> *From:* sr-users <sr-users-bounces at lists.kamailio.org> *On Behalf Of *Allan
> Kristensen
> *Sent:* Monday, October 19, 2020 2:02 PM
> *To:* miconda at gmail.com
> *Cc:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> *Subject:* Re: [SR-Users] No retry on INVITE
>
>
>
> 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
>
>
>
>
>
> _______________________________________________
>
> Kamailio (SER) - Users Mailing List
>
> sr-users at lists.kamailio.org
>
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>
> --
>
> Daniel-Constantin Mierla -- www.asipto.com
>
> www.twitter.com/miconda -- www.linkedin.com/in/miconda
>
> Funding: https://www.paypal.me/dcmierla
>
>
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