[asterisk-users] Dualstack

[Matthew Jordan]

----- Original Message -----
> From: "Pawel Kuzak" <pawel.kuzak at 1und1.de>
> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users at lists.digium.com>
> Sent: Thursday, June 14, 2012 10:22:21 AM
> Subject: [asterisk-users] Dualstack
> 
> I have an Asterisk (v10.2.0) running and bound to address "::". I
> think
> this way he listens and answers to requests send to the IPv4 and IPv6
> address (haven't check that with IPv6 yet). What I want to achieve
> is,
> that he handles signaling via IPv4, but RTP via IPv6.
> In my setup, I have a user agent (Dualstack) that generates an INVITE
> and sends it out via IPv6. In the SDP part the user agent expects the
> RTP traffic on its IPv6 address as well. Between the user agent and
> the
> Asterisk, I have a proxy that handles the signaling part, and
> translates
> from IPv6 to IPv4 and vice versa. The Asterisk accepts that request
> (IPv4) and does everything well, except that in his SDP offer, he
> inserts his IPv4 address (I think that's because he received the
> request
> via IPv4).
> The result of this is:
> The user agent sends RTP traffic via IPv4 to the Asterisk.
> The Asterisk sends RTP traffic via IPv6 to the user agent.
> 
> Signaling: UA <---- (IPv6) ----> Proxy <---- (IPv4) ----> Asterisk
> RTP: UA ------------------- (IPv4) --------------------> Asterisk
>          UA <----------------- (IPv6) ---------------------- Asterisk
> 
> Does anybody know how I can achieve that Asterisk does input his IPv6
> address in the SDP offer and uses that for incoming RTP, if he sees,
> that the user agent also uses an IPv6 address in his SDP offer?
> Maybe there is an easy way and I've just overseen a configuration
> option. Or do I have to patch the sources?
> 
> Thanks in advance!
> 

Assuming that the same address can be sent to all user agents that
communicate with that Asterisk instance, the media_address setting could
potentially be used to specify an IPv6 address to send media to, while
keeping the signalling on IPv4.

--
Matthew Jordan
Digium, Inc. | Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: http://digium.com & http://asterisk.org