Hello, upgraded from bird 1.2.4 to bird 1.3.1 last weekend, but needed to revert due to complaints from high bgp traffic to bgpmon.net and 100% cpu load on a 2x bird bgp routers setup connected with iBGP. Did some research, and noticed a high bgp traffic situation on the iBGP sessions (about 10.000 bgp packets in 1.7 second) Based on graph statistics, i noticed a irregular traffic on the trans-ip's as well (noticed after rollback in statistical graphs) In the logging (mostly on the first bgp router) , i noticed quite some messages (33414 in ~12h) like: 29-05-2011 10:57:49 <WARN> Next hop address X.X.X.242 resolvable through recursive route for X.X.X.0/24 29-05-2011 10:57:49 <WARN> Next hop address Y.Y.35.194 resolvable through recursive route for Y.Y.32.0/19 29-05-2011 10:57:52 <WARN> Next hop address X.X.X.241 resolvable through recursive route for X.X.X.0/24 29-05-2011 10:57:52 <WARN> Next hop address X.X.X.242 resolvable through recursive route for X.X.X.0/24 29-05-2011 10:57:55 <WARN> Next hop address Y.Y.35.194 resolvable through recursive route for Y.Y.32.0/19 29-05-2011 10:57:55 <WARN> Next hop address X.X.X.241 resolvable through recursive route for X.X.X.0/24 29-05-2011 10:57:55 <WARN> Next hop address X.X.X.242 resolvable through recursive route for X.X.X.0/24 These are the subnets of the upstream trans-ip links of it's neigbor router On the second (neighbor) bgp router, noticed only such 15 recursive messages I had those upstream trans-ip interface IP's manually added once to the bird.conf with a "protocol static" definition with a subnet of /32. I thought this might be the problem, and wel, disabled those static trans-ip interface routes, except i forgot one. Noticed a lower CPU afterwards, but problem persisted, and i reverted to 1.2.4. Later i noticed i missed one static route to disable, but no time left to upgrade and test again. I think i should have looked at the recursive routes in bird, but i didn't. Does one know what was going on here, and what to do to prevent it when executing another upgrade? I created a 10.000 packet tcpdump capture (full size) of an iBGP session, in case somone would like to look at it. Regards, Arjan Filius -- Arjan Filius mailto:iafilius@xs4all.nl