[c-nsp] Identifying BGP route flapping

[Frank Bulk]

Yes, there was an event that caused the router flapping to happen, but it
was clearly an anomaly.  There was a sub-50 msec interruption in Ethernet
traffic on the upstream for one router that caused the two routers
(connected with each other over a separate link) to go haywire.

US-A====US-B
  |       | <- this less dropped for less than 50 msec (BGP)
ME-A====ME-B
  |       |  OSPF
Edge1==Edge2
   \     /
    =====
      |
    core

But my interest is not in explaining the cause, but being to know within 5
minutes if it happens again.

Frank

-----Original Message-----
From: David Coulson [mailto:david at davidcoulson.net] 
Sent: Wednesday, April 09, 2008 8:55 PM
To: frnkblk at iname.com
Cc: 'Mike Johnson'; Adam Armstrong; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Identifying BGP route flapping

Maybe I missed something. Your upstream manages the routers, so can they
not explain the route flaps? I would think the burden would be on them
to demonstrate why your sessions reset?

Was there an event which caused the flaps?

Frank Bulk wrote:
> We're not that desperate to monitor BGP flaps to install a router, and
even,
> that's not a counter, is it?