[SR-Users] Specifying Upstream and Downstream Servers for a simple SIP proxy

[Daniel-Constantin Mierla]

Hello,

listen is to specify local ip address or network interface on which 
kamailio should listen for sip traffic.

To send to an ip address there are couple of variants, in config file:

$ru = "sip:" + $rU + "@__NEXT_PROXY_IP__";
t_relay();
exit;

Or, if you don't want to change the r-uri, then use:

$du = "sip:__NEXT_PROXY_IP__";
t_relay();
exit;

Of course, you have to replace  the __NEXT_PROXY_IP__ with the 
appropriate value.

More dynamic option would be using dispatcher module.

Cheers,
Daniel

On 15/06/14 15:28, AliReza Khoshgoftar Monfared wrote:
> Dear Kamailio users,
>
> I am trying to set up a simple scenario as follows:
>
> UAC --> Proxy_1 --> Proxy_2 --> Proxy_3 --> UAC
>
> I am new to Kamailio and had the following basic questions that came 
> to my mind after reading the documentation an the default kamilio.cfg 
> config script:
>
> 1) Is there any good example of the above scenario in which the UAC 
> and UAS (caller and callee) are modeled using SIPp and proxies are 
> simple kamailio instances run on different machines that simply 
> forward the SIP packets?
>
> 2) In specific, I want the proxies to simply forward the messages to 
> their downstream (I do not care about registration or other operations 
> and look for a minimally working simple SIP scenario). Is there any 
> example of such configuration?
>
> 3) Let's imagine Proxy_2 in the above example, in the default config, 
> it looks like that with modifying line 164, "listen=udp:10.0.0.10:5060 
> <http://10.0.0.10:5060>" I can specify the address of its upstream, 
> Proxy_1, but how and where shall I set the specifications of the 
> downstream, Proxy_3?
>
> I suspect it is somewhere in the Routing Logic block (line 449) but 
> not sure how it is exactly done. I see a "route(SIPOUT)" call for 
> example but I am not sure how and where the value of SIPOUT is 
> modified. Is it a representation of the downstream servers in the 
> config file?
>
>
> Thanks,
> Alireza
>
>
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-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

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