we have router Cisco IOS Software, 3800
it was not reacable for few mins to check the cause i see logs they were clean.i check bgp summ nei were up from last 5 weeks
sh ip bgp summ
BGP router identifier 10.70.12.8, local AS number 64727
BGP table version is 614669, main routing table version 614669
1626 network entries using 190242 bytes of memory
1628 path entries using 84656 bytes of memory
115/114 BGP path/bestpath attribute entries using 14260 bytes of memory
103 BGP AS-PATH entries using 3644 bytes of memory
16 BGP community entries using 384 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 293186 total bytes of memory
BGP activity 48068/46442 prefixes, 137122/135494 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.70.12.13 4 64543 5188711 5000294 614669 0 0 5w0d 1619
172.17.41.245 4 65432 3757879 3757823 614669 0 0 5w0d 1
172.25.40.6 4 65434 7493872 7493982 614669 0 0 5w0d 1
i did command sh ip protocols
Routing Protocol is "bgp 64727"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
IGP synchronization is disabled
Automatic route summarization is disabled
Address FiltIn FiltOut DistIn DistOut Weight RouteMap
Maximum path: 1
Routing Information Sources:
Gateway Distance Last Update
10.70.12.13 20 01:24:56
172.17.41.245 20 5w0d
172.25.40.6 20 5w0d
Distance: external 20 internal 200 local 200
it shows that neu 10.70.12.13 which goes to AT T MPLS CE router route updates gor refreshed.my question is why ip bgp summ does not show that routes were refreshed?
does these times correspond to when you lost connectivity to peer router ? If so find out what did both operator do on ur box.
The other option is to actually ask peer router operators if they can confirm anything has gone wrong at their end.
on ur box, check for high CPU "sh proc cpu his" and validate if outage correspond to a high spike.