On 04.12.2012, at 07:27, Olle E. Johansson wrote: >>>> by the way, cisco ios gateways implement ANAT (rfc 4091), which allows >>>> sdp stream contains both ipv4 and ipv6 media address. that would be >>>> useful in sems outbound calls too. >>>> >>> Yes, indeed. In the RFC it says: "obsoleted by RFC5245 (ICE)". Do you >>> think I could still consider it as relevant, or just as legacy? >> >> there are lots of legacy sip clients that don't support ice (which is >> very complex to implement). if sems would use anat to include both >> addresses in sdp, then the sip proxy that forwards the call and knows ip >> version of callee, could easily strip the other address away and callee >> would receive a normal non-anat sdp. > > There is a discussion on the SIP forum IPv6 list (which you should subscribe > to :-) ) > about re-instating ANAT. It's a simple fix compared with implementing ICE.
Yes, this is what I think as well. ICE is a kind of overkill for choosing between IPv4 and IPv6… Concerning the list, I'm not sure I should subscribe, as you would loose the chance of informing me of latest development ;-) -Raphael. _______________________________________________ Semsdev mailing list [email protected] http://lists.iptel.org/mailman/listinfo/semsdev
