[SR-Users] rtpengine symmetric RTP behavior

[Narsay, Deep]

Hello Andreas,

Yes, that's what I had thought, but

I am actually seeing it using two different UDP ports towards Freeswitch
(send=40036 and recv=40042)

and two more ports towards SIP Client (send=40038, and recv=40040).

I am wondering if there is any setting (or flag at compilation time) that
will make it symmetric.

This rtpengine is daemon only, (not using kernel module).

Thank you,
- Deep N




On Mon, Aug 11, 2014 at 4:43 PM, Andreas Granig <agranig at sipwise.com> wrote:

> Hi,
>
> On 08/11/2014 08:34 PM, Narsay, Deep wrote:
> > Is there any way rtpengine can be configured to use same UDP port to
> > receive and transmit RTP  packets?
> >
> > The set up I'm trying is
> >
> > SIP_Client -->  Kamailio/rtpengine  -->  Freeswitch
> > Internet            Internet         LAN          LAN 192.168.1.10
> >
> > I tried /rtpengine_offer / in  kamailio.cfg,
> > but rtpengine seems to always use different ports to Tx/Rx the packets.
> > (Causing Freeswitch to auto adjust its ports, which mutes the audio
> >  channel one way).
>
> Well, rtpengine actually uses the same port to send and receive traffic
> towards a UA. However, it uses two different ports for the two parties,
> which shouldn't be an issue, because Freeswitch will only see the one
> port towards itself.
>
> Andreas
>
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