I seem to have lost connectivity across MAE-East to a group of peers. It appears to have come back at about 1:00PM Eastern time. I've attached some snippets from our BGP table, anyone know what may have happened, and what is common to these peers that dropped thier sessions?

I would suspect that all the peers you mention are in Boone Boulevard and probably all on shared FDDI (certainly we are - AS5413). This appears to have been doing all sorts of strange things. I had MFS change our physical port on the FDDI card, the jumper fibre, and the concentrator port and it makes no difference. Symptoms are (if you want to try it) do a 8000 byte 8000 packet ping to something not on shared FDDI and it will all work fine for (say) 30 seconds. But occasionally there is the odd 10 seconds of slowness and/or 50% packet loss, and the odd 5 second blackout. If you look at UPDOWN logs, you may see a bounce one or two times an hour where the i/f went down (we sort 30 yesterday). MFS is currently blaming our FDDI card - I think I'm blaming congestion as there is currently only one, unmanaged concentrator serving all shared FDDI clients. If anyone else on shared FDDI can see similar problems, I'd be really grateful to hear about it as though MFS have been pretty helpful in swapping things out, they have now swapped everything except the concentrator itself (and, of course, the topology :-) ). This will help me greatly in proving my congestion / dead concentrator thesis. Alxe Bligh Xara Networks

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State

[snip]

192.41.177.65 4 6205 32618 72819 2428592 0 0 07:48:39 192.41.177.73 4 6082 16026 56940 2428592 0 0 07:47:15 192.41.177.75 4 3951 48247 56693 2428593 0 0 1w4d

[snip]

192.41.177.113 4 3549 16133 56706 2428593 0 0 1w3d 192.41.177.117 4 6079 16245 56869 2428593 0 0 07:47:49 192.41.177.118 4 6196 16160 56661 2428593 0 0 6d16h 192.41.177.122 4 1299 17874 56841 2428593 0 0 3d07h 192.41.177.132 4 3257 16163 57035 2428593 0 0 07:47:45 192.41.177.147 4 3847 18249 56666 2428593 0 0 2d20h

[snip]

192.41.177.160 4 3407 48456 56732 2428593 0 0 4d09h 192.41.177.166 4 2885 20740 56618 2428593 0 0 07:47:28 192.41.177.169 4 2885 20599 56815 2428593 0 0 1d07h

[snip]

192.41.177.182 4 5683 18340 56875 2428593 0 0 4d08h 192.41.177.183 4 5683 18370 57018 2428593 0 0 07:47:47 192.41.177.192 4 2548 41322 52346 2428593 0 0 2d12h

[snip]

192.41.177.210 4 2551 21995 56687 2428593 0 0 1w4d 192.41.177.215 4 5413 165794 58802 2428593 0 0 07:47:51 192.41.177.228 4 4006 16269 56949 2428593 0 0 1d21h

[snip]

192.41.177.242 4 1239 184562 56686 2428593 0 0 1w4d 192.41.177.245 4 174 57149 57069 2428593 0 0 07:47:29

NOTE the 07:47:XX. All appear to have dropped at the same time. Hrm, one CWIX router stayed up, one went down. CWIX, what is the difference?

Chris A. Icide Nap.Net, L.L.C.