Hello, Razvan!
 
No, on the third leg the first instance doesn`t send 100 Trying to the Proxy. I made it because the Proxy is responsible for routing to another destination if INVITE cannot be sent to a main route in any case.
So as i understand i can only use fr_timeout and fr_inv_timeout, right?
 
-- 
Best regards, Denis.
 
 
 
19.12.2016, 13:55, "Răzvan Crainea" <[email protected]>:
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.
 
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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