[c-nsp] 7200 vs. 7600

Dale W. Carder dwcarder at doit.wisc.edu
Tue Oct 5 18:58:31 EDT 2004

On Oct 5, 2004, at 5:00 PM, F. David Sinn wrote:
> Netflow can be an issue if you have too many flows, in that you can 
> blow out the Netflow TCAM cache.  I haven't tested the real to 
> advertised flow cache ability of a 3BXL, but have seen issues with the 
> PFC2 which has half as many entries.

What is the operational impact of overflowing the netflow table?  I 
thought that netflow (on the sup2 and 720, which both use CEF) was only 
used for netflow export, and IIRC, nat.

However, purging/expiring too many netflow entries does raise the cpu 
load of the switch processor (this was the L3Aging process on CatOS, 
don't recall what it is on IOS).


More information about the cisco-nsp mailing list