[SR-Users] Yet another IPv6 question related with rtpproxy ipv4/ipv6 bridging

Miguel Baptista miguel.baptista at uninett.no
Mon Apr 1 01:31:49 CEST 2013


On 3/25/2013 9:46 AM, Olle E. Johansson wrote:
>
> 25 mar 2013 kl. 09:23 skrev Miguel Baptista
> <miguel.baptista at uninett.no <mailto:miguel.baptista at uninett.no>>:
>
>> Hello,
>>
>> I have been doing some tests with kamailio and IPv6. 
>>
>> My initial setup was IPv6 only and now am I extending it to a
>> dual-stack environment. Well, and now I am starting to face some
>> (interesting) challenges.
>>
>> So, the first step in the dual-stack environment was to install RTP
>> Proxy and configured kamailio to use it.  With this setup, the UAs
>> locally registered were able to communicate with each-other no matter
>> with address family (IPv4/IPv6) they were using. So far so good.
>>
>> But now I want to extend my tests a bit more ... I want to
>> communicate with the "outside world" (using ENUM and domain based SIP
>> URIs). Do I have a way to know if the "destination" is IPv4 or IPv6?
>> Because I need that information in order to properly bridge the calls
>> on rtpproxy. 
>>
>> I tried to use the onsend_route but it didn't work. I mean, I am able
>> to know if the "next-hop" is IPv6 or IPv4 but it seems that it is
>> "too late" to use rtpproxy. BTW ... I am assuming that if the
>> "next-hop" is IPv6 then the final user agent will also be IPv6 (the
>> same for IPv4) 
>>
>> Should I use some other approach? For example, failure route instead? 
>> Does anyone have a similiar setup? How are you solving this issue?
>
> The only way you can get an indication of the other end is to check
> their SRV records, but that doesn't say anything about the devices and
> their media capability. The best way moving forward is to support ICE
> for exactly this case.
>
> The RFC for SIP IPv6 migration says that it's the IPv6 supporting
> device's responsibility to send an offer with dual stack support, so
> your callers need to make sure you have both IPv4 and IPv6 addresses
> in the ICE candidates in the SDP offer.
>
> As I'm currently hacking SNMP, can you please check if there are any
> issues with IPv6 in the SNMPstats module?
>
> /O
>
Thanks for your feedback Olle.
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20130401/ab5c8e1c/attachment.htm>


More information about the sr-users mailing list