Just upgraded to 1.4.2 from 1.3.9 and having issue with a ipv6 session that has 10k routes. Bird concierge as a route viewer ( no routing tables exchanged) Here is the error: Jun 17 17:21:30 collector kernel: [ 7107.186257] show_signal_msg: 3 callbacks suppressed Jun 17 17:21:30 collector kernel: [ 7107.186264] bird6[2295]: segfault at ffff800092721fa9 ip 00007fc03639dc2d sp 00007fff6d8ddfb0 error 5 in bird6[7fc036378000+70000] Jun 17 17:21:31 collector bird6: Started Jun 17 17:22:12 collector kernel: [ 7149.335707] bird6[15384]: segfault at ffff8000a4f155d9 ip 00007f0bdbc37c2d sp 00007fff5b0ea980 error 5 in bird6[7f0bdbc12000+70000] Jun 17 17:22:13 collector bird6: Started Jun 17 17:23:33 collector kernel: [ 7229.888236] bird6[15638]: segfault at ffff8000d3104cc9 ip 00007fbf1e824c2d sp 00007fff2cefb290 error 5 in bird6[7fbf1e7ff000+70000] Jun 17 17:23:33 collector bird6: Started Jun 17 17:24:00 collector kernel: [ 7256.689590] bird6[15710]: segfault at ffff8000c005edf9 ip 00007f69599a1c2d sp 00007fff3ffa1160 error 5 in bird6[7f695997c000+70000] Jun 17 17:24:00 collector bird6: Started Jun 17 17:25:43 collector kernel: [ 7360.327092] bird6[15741]: segfault at ffff8000a909a329 ip 00007f4195995c2d sp 00007fff56f65c30 error 5 in bird6[7f4195970000+70000] Jun 17 17:25:44 collector bird6: Started Jun 17 17:26:29 collector bird6: Reconfiguring Jun 17 17:26:29 collector bird6: Removing protocol Hurricane Stays up after I comment out users: #protocol bgp Hurricane { # description "as6939"; # local as 65000; # neighbor 2001:504:3b::14 as 6939; # route limit 35000; #} I've tried it with and without the route limit in it. There are <10k routes being sent. If I try to send that many routes (actually a full table) from another peer I do get the same error. It seems to be an issue with going over a certain number of ipv6 routes Thanks - Paul