Cisco 7200 VXR with NPE-400 (was RE: The market must be coming back)

Wed May 22 14:18:14 UTC 2002

did you do netflow switching or cef + netflow accounting that time?

--

Tomas Daniska
systems engineer
Tronet Computer Networks
Plynarenska 5, 829 75 Bratislava, Slovakia
tel: +421 2 58224111, fax: +421 2 58224199

A transistor protected by a fast-acting fuse will protect the fuse by blowing first.

> -----Original Message-----
> From: Ralph Doncaster [mailto:ralph at istop.com] 
> Sent: 22. mája 2002 16:15
> To: Heath_Dieckert at Dell.com
> Cc: nanog at merit.edu
> Subject: RE: Cisco 7200 VXR with NPE-400 (was RE: The market 
> must be coming back)
> 
> 
> 
> > Based on our testing it looks like it all has to do with 
> packet size.  With
> > small packets the throughput is very low.  With what Cisco calls an
> > "internet mix" of packet sizes throughput is much better.  
> When doing max
> > MTU packets, the throughput is of course the best.  
> 
> The other thing I've found about traffic type is how sensitive
> netflow is.  I was running it for a while, then I got a co-lo customer
> that had a lot of UDP traffic with small packet sizes and 
> rarely more than
> a few packets between the same src/dest ip/port (much like DNS
> queries).  It was enough to flatline the box and cause it to crash.
> 
> -Ralph
> 
> 