[OpenSIPS-Users] Query about RTP flow

[Ali Pey]

Hello Nandini,

RTP session is negotiated through SDP. If the Invite message has the
OpenSIPS IP address in the SDP, then the client will send the packets to
opensips server and you need to run rtp proxy. If the other client IP
address is in the SDP, then the RTP packets don't come to opensips and go
directly to the other client. The same goes for 200 OK.

As for switches and routers, that's how IP packets are routed based on your
cabling, IP addresses and mac addresses. These are two separate things.
Think of them completely separately. RTP packets have voice and video data
but how they are routed to their destination IP is all in IP protocol and
has nothing to do with SIP. The destination IP address in your RTP packets,
that comes from SDP negotiation through SIP. A different story.

Regards,
Ali Pey


On Tue, Feb 25, 2014 at 2:20 PM, Nandini <sermj2012 at gmail.com> wrote:

> Dear Ali Pey,
>
> Sorry for creating kind of mess in my question.
> No i am not talking about any IP routing, But  my question is totally
> related only to RTP packet flow between client -to- client. I mean when SIP
> establihes a call session between two SIP clients (Which are registered to
> OpenSIPS server), in that point of time How RTP packets (which carries
> voice/video) flows from one client to another client ?
>
> Here below link is my test bed set-up :
>
> My_test_bed_set-up.png
> <
> http://opensips-open-sip-server.1449251.n2.nabble.com/file/n7589774/My_test_bed_set-up.png
> >
>
> And now My question is:
> What is RTP session client-to-client ?
> Is this RTP packets in voice/video call from caller will pass through
> router
> 1 ---> switch ----> router 2---> destination SIP client ? or just Caller to
> Destination client ? (without pass through any nodes in between).
>
> (If suppose i run media proxy server with OpenSIPs server then RTP packets
> has to pass through all the nodes (routers and switch) in between to get
> relay to other end client right ?)
>
> So in this context if i run only openSIPS server without any Media-proxy
> servers, how the RTP packets are achieving Client-to-client transfer ?
>
> Please help me in clarifying this questions.
>
> Regards,
> Nandini
>
>
>
>
> --
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> http://opensips-open-sip-server.1449251.n2.nabble.com/Query-about-RTP-flow-tp7589763p7589774.html
> Sent from the OpenSIPS - Users mailing list archive at Nabble.com.
>
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