[OpenSIPS-Users] TCP connections for relaying calls

[Bogdan-Andrei Iancu]

Hi Mariana,

Because of the TCP conn reusage, between 2 SIP entities preserving their 
IP and port, you will have only 1 TCP conn (per direction). This will 
lead to a "tunneling" effect between 2 proxies - all traffic will be 
pushed via a single connection.

To avoid this, use multiple TCP interfaces (same ip but different ports) 
between the 2 opensips - and when OS1 has to send to OS2 to do 
dispatching over all interfaces of OS2 ; and vice versa. This will 
create multiple connections between the 2 servers.

I know it is not nice, but it solves the purpose - maybe in long term we 
need some logical way to control the connection re-usage (maybe 
depending on load/traffic - if too much, avoid reusing, create a new conn).

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com


On 11/08/2012 01:52 PM, Mariana Arduini wrote:
> Hello all,
>
> We are using 2 OpenSIPS servers and TCP between them:
>
> tcp ---> OSIPS1 <--- tcp ---> OPSIPS2 <--- tcp
>
> OSIPS2 has a bunch of children processes running, but we can only see 
> few of them actually being used. When we use SIPp scripts instead of 
> OPSIPS1 and set it to use 1 TCP connection per call (parameter -t tn), 
> then we can see more than just a few OPSIPS2 children processes being 
> used.
>
> The problem is this is decreasing OSIPS2 performance, so we need to 
> have OSIPS1 using more than just 1 TCP connection. Is this possible?
>
> Thanks in advance for any help!
> Mariana.
>
>
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