Re: Catalyst 6500 High Switch Proc

From: Kevin Loch (no email)
Date: Sat Nov 15 2008 - 21:53:43 EST

  • Next message: Paul Ferguson: "McColo: Are the 'Lights On" at Telia?"

    Jon Lewis wrote:
    > On Sat, 15 Nov 2008, Philip L. wrote:
    >
    >> This is on a Sup720-3BXL by the way:
    >>
    >> 'sh mls netflow table-con detailed:'
    >> Earl in Module 5
    >> Detailed Netflow CAM (TCAM and ICAM) Utilization
    >> ================================================
    >> TCAM Utilization : 100%
    >> ICAM Utilization : 6%
    >> Netflow TCAM count : 262024
    >> Netflow ICAM count : 8
    >> Netflow Creation Failures : 2085847
    >> Netflow CAM aliases : 0
    >
    > This looks like the same issue I ran into not long ago. Switch your
    > netflow over from full to sampled...you lose lots of data, but your
    > hardware can't handle full netflow for your traffic level.
    >
    > AFAIK, your only other options are to mess with the mls aging timers
    > (shorten them) or buy cards with DFC and hope that gets you enough
    > additional netflow capacity for the interfaces your collecting.
    >
    > http://www.gossamer-threads.com/lists/cisco/nsp/94953

    Hopefully he is not trying to use netflow for accounting/billing.
    I use:

    mls sampling packet-based 1024 8192

    As it is a convenient factor of ~1000 from the real numbers.
    1Gbit/s of traffic shows up as 1Mbit/s. This has been accurate enough
    for anything I have wanted to look at like per-AS traffic.

    - Kevin


  • Next message: Paul Ferguson: "McColo: Are the 'Lights On" at Telia?"





    Hosted Email Solutions

    Invaluement Anti-Spam DNSBLs



    Powered By FreeBSD   Powered By FreeBSD