[OpenSIPS-Users] Opensips 2.2 and CANCEL transaction

[Răzvan Crainea]

Hi, Denis!

According to the SIP RFC, if the Proxy doesn't receive any reply, it 
will not generate a CANCEL. Are you sending at least 100 Trying between 
your servers?

Best regards,

Răzvan Crainea
OpenSIPS Solutions
www.opensips-solutions.com

On 12/19/2016 12:42 PM, Denis wrote:
> Hello!
> Server:: OpenSIPS (2.2.2 (x86_64/linux))
> I am going to use Opensips as top_hiding, load balancer and proxy 
> instance.
> My scheme looks as follows.
> The first instance: top_hiding and load balancer. It listens 5060 and 
> 5068 ports.
> The second instance: proxy. It listens 5065 port.
> The scheme of the call:
> Caller SIP UA -> first instance (makes top_hiding and load balancer) 
> -> second instance (makes routing and setup destination URI) -> first 
> instance (makes top_hiding) -> Callee SIP UA.
> This scheme of the call seems to be working correctly (from 
> perspective of SIP signalling) for:
> - successful call (i.e. call with answer)
> - Cancel transaction during ringing of th callee
> But when i emulated situation, when callee becomes unreachable 
> (internet problem or other) the PROXY doesn`t send CANCEL to the first 
> instance on the third leg.
> tcpdump capture of the problem call you can find here.
> https://yadi.sk/d/ase8fSjw342eBJ
> Where
> Caller - 192.168.18.150
> the first instance and the second are located on the same server (IP 
> address - 172.31.0.10)
> Thank you for any help.
> -- 
> Best regards, Denis
> -- 
> С уважением,
> Путято Денис.
>
>
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