[c-nsp] NetFlow NDE Configurations for PFC/MSFC

[Simon Leinen]

Mohacsi Janos writes:
>> Looking for any gotchas in deploying Netflow Analysis on the Cisco 7606,
>> SUP720-3BXL... CPU/Memory??

> For netflow collection you have to think about the TCAM size
> only. You can have up to 256 000 entries with BXL. For each
> exporting session count ~ 16-20% CPU usage on a busy box, especially
> if you export more than one destination... I hope this helps...

This is good advice.  I'd add that much/most of the CPU load will be
on the Switch Processor (Sup) rather than on the RP (MSFC), meaning
you see it using "remote command switch show processes cpu" rather
than using "show processes cpu".

On the other hand, a 100% busy SP doesn't seem to cause as many
problems as a 100% busy RP - SNMP may have trouble retrieving some
interface counters, but you won't lose routing protocol adjacencies.
-- 
Simon.