nanog mailing list archives
Re: Netflow on SUP720-3BXL
From: Nick Hilliard <nick () foobar org>
Date: Sun, 15 Mar 2009 09:23:29 +0000
On 15/03/2009 01:55, Andy Bierlair wrote:
I’m trying to run netflow on one of our Cisco core routers (SUP720-3BXL), but I think I am hitting some limitations because of this:
Sounds about right for the amount of traffic you're pushing through the box. The SUP720 is a very poor netflow platform.
There has been extensive discussion about this problem in cisco-nsp over the past several years, and this posting is probably more appropriate to that mailing list. But basically, there is too little netflow tcam on this card to deal with anything more than a couple of gigs of traffic. You can help things by setting the aging timer to be very aggressive, and by getting DFCs (although these are a rather expensive option). Sampling won't generally help, as the sampling is done in software, after the data has been collected.
More info on:
http://www.google.com/search?q=sup720+netflow+%2Bsite:puck.nether.net/pipermail/cisco-nsp
Nick
Current thread:
- Netflow on SUP720-3BXL Andy Bierlair (Mar 14)
- Message not available
- Re: Netflow on SUP720-3BXL Andy Bierlair (Mar 14)
- Re: Netflow on SUP720-3BXL Olof Kasselstrand (Mar 15)
- Re: Netflow on SUP720-3BXL Andy Bierlair (Mar 14)
- Message not available
- Re: Netflow on SUP720-3BXL Nick Hilliard (Mar 15)
- Re: Netflow on SUP720-3BXL Jon Lewis (Mar 15)
- Re: Netflow on SUP720-3BXL Neil J. McRae (Mar 16)