Hello Ondrej, Thank you very much for the provided support.
The issue with not establishment of iBGP between RS-RS over IPv6 has been caused by wrong FW config. Thanks once again and have a nice day! Best~ Javor Kliachev Senior Engineer IP Services office: +359 2 974 33 11 mobile: +359 885 98 84 95 [ http://www.neterra.net/ | www.neterra.net ] [ https://bg.linkedin.com/pub/javor-kliachev/11/b46/843 | ] ----- Original Message ----- From: "Ondrej Zajicek" <santi...@crfreenet.org> To: "Javor Kliachev" <jkliac...@neterra.net> Cc: "bird-users" <bird-users@network.cz>, "inmt-ip" <inmt...@neterra.net> Sent: Friday, 23 July, 2021 18:23:08 Subject: Re: BIRD - iBGP between RS over IPv6 lead to crash (segfault) On Tue, Jul 20, 2021 at 01:41:06PM +0300, Javor Kliachev wrote: > Hello Ondrej, > > Many thanks for the advise. > > We have upgraded BIRD to the latest 1.6.8 version. > In this version seems the crash issue is resolved but the second issue with > - iBGP between RS-RS over IPv6 still exists. This BGP session is not able to > establish yet. > > In my LAB I have successfully replicated the issue. Both Route Servers are on > BIRD with latest version 1.6.8. They have the following IPv6 addresses > configured: > > RS1 IPv6 - 2001:67c:29f0::A:1:234:4 > RS2 IPv6 - 2001:67c:29f0::A:1:234:5 > > Here is the config fo each RS > > Seems the issue happens when remote peer is also BIRD. When remote peer is > router ( Cisco, Juniper, Quagga etc... ) the session is successfully > established. > On IPv4 iBGP between both RS works fine. So the issue related only with IPv6 > stack. > > Initially before the crash we have added the following config below and RS > was stable but session was not able to establish. > We have made a capture of the traffic during the attempt of session > establishment and seems TCP handshake works but then not procced futher. Hello Cannot replicate that, works for me. Do you have the problem with both direct / multihop mode? Can you send me the capture? If you enable 'debug all' for sessions, what is in logs? -- Elen sila lumenn' omentielvo Ondrej 'Santiago' Zajicek (email: santi...@crfreenet.org) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so."
