On Wed, Aug 23, 2023 at 4:36 AM Benoît Panizzon <benoit.paniz...@imp.ch> wrote:
> Hi > > I'm attempting to use ICE to be able to present all possible RTP > transports to peers. > > 16.28.0~dfsg-0+deb11u2 (I know it's old, but unfortunately Asterisk was > removed from debian 'stable' and the version in 'sid' is just broken > (opus + voicemail don't work anymore). > > But I ran into an issue when the peer is running rtpengine: > > Asterisk offers: > > a=candidate:H9da13901 1 UDP 2130706431 157.161.57.1 13104 typ host > a=candidate:H1054cffa 1 UDP 2130706431 2001:4060:dead:beef::1 13104 typ > host > a=candidate:He9b56028 1 UDP 2130706431 fe80::5054:ff:fea2:9057 13104 typ > host > a=candidate:H9da13901 2 UDP 2130706430 157.161.57.1 13105 typ host > a=candidate:H1054cffa 2 UDP 2130706430 2001:4060:dead:beef::1 13105 typ > host > a=candidate:He9b56028 2 UDP 2130706430 fe80::5054:ff:fea2:9057 13105 typ > host > > To me this looks like every candidate is duplicated on port +1 > > rtpengine complains: > > [ice] Priority collision between candidate pairs > sKy64vK5pY86kc9w:H9da13901:2 and sKy64vK5pY86kc9w:H9da13901:2 - ICE will > likely fail > > And indeed RTP starts on IPv6 as proposed by H1054cffa but as soon as a > re-invite is processed rtpengine switches to I guess H9da13901 and rtp dies. > > Why is asterisk proposing two ports per ip protocol? Is there a way to > configure this more precisely? > They are not strictly duplicated. They are candidates for different components. One is for RTP, one is for RTCP. -- Joshua C. Colp Asterisk Project Lead Sangoma Technologies Check us out at www.sangoma.com and www.asterisk.org
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