[c-nsp] Memory exhaustion causing BGP sessions to randomly fail

[Drew Weaver]

No, the upstream is a OC-12. So they're on separate modules.

-Drew
XLHost.com 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Justin M.
Streiner
Sent: Friday, February 09, 2007 10:36 AM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Memory exhaustion causing BGP sessions to randomly
fail

On Fri, 9 Feb 2007, Drew Weaver wrote:

> Today we had an issue where one of our interfaces (a 100mbps 
> interface) was getting DDOS attacked, the router was trying to push 
> 300Mbps down a 100Mbps interface.
>
> During this time, the bgp session with one of our upstream providers
> would:
>
> Feb  9 10:44:28.196 EST: %BGP-5-ADJCHANGE: neighbor x.x.x.x Down BGP 
> Notification sent Feb  9 10:44:28.196 EST: %BGP-3-NOTIFICATION: sent 
> to neighbor x.x.x.x 4/0 (hold time expired) 0 bytes

Was the session in question running over the interface that was getting
DDOS'd?

If multiple sessions were bouncing, then at first glance I'd guess it
was a CPU overrun issue of some sort and the bouncing BGP sessions were
a side effect of this.

jms
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