I finally decided to shut down all peerings and brought them back one by one.
Everything is stable again, but I don't like the way I had to deal with it since it will most likely happen again when DECIX or an other IX we're at is having issues. I've seen a few BGP convergence discussions on NANOG, but none about deadlock situations and what could be done to avoid them. Setting higher MTU or bigger hold queues did not help. - Andy On Tue, Jun 8, 2010 at 2:35 PM, Ingo Flaschberger <i...@xip.at> wrote: > Dear Andy > >> This morning there was an ethernet loop problem on DECIX, causing many >> BGP sessions to flap throughout the entire platform. >> While this can happen, I am myself facing with BGP convergence >> problems on our DECIX router (SUP720-3BXL with IOS SXI3). >> >> De DECIX loop has been solved two hours ago, but my BGP sessions are >> still flapping and not converging at all. This has been flooding our >> logs, and is still going on: > > route half or more of the peering-network to Null -> lowering bgp session > up's. > (at the other side, your bgp-router seems to be overloaded). > > Kind regards, > Ingo Flaschberger > >
