[c-nsp] Monitoring CPU usage on a Sup720-3BXL (BGP)

[e ninja]

Drew,*

Responses inline in italics..*

On Tue, Sep 1, 2009 at 11:10 AM, Drew Weaver <drew.weaver at thenap.com> wrote:

>                Hey there,
>
> We've probably all seen this issue before, with BGP scanner eating up a
> large amount of CPU time on a powerful supervisor/route processor, etc. My
> question is, how are you supposed to accurately monitor the
> performance/utilization of the system when this thing is pushing it up to
> 80% on a regular basis,

*
Baselining. Since you know BGP scanner runs once every minute, only CPUs
spikes that are inconsistent with 'expected' periodic BGP scanner activity
should raise red flags.*



> alternatively, does anyone know if they're ever going to release a product
> that doesn't have this quirk?


*BGP scanner is a housekeeping maintenance activity by the main system
processor. As such, its 'impact' on the 'system' should continue to diminish
as more platforms become modular (distributed architecture) and/or switch
packets in hardware. *

-Eninja