6509 High Cpu Utilization

Discussion in 'Cisco' started by 330individual@gmail.com, Nov 30, 2007.

  1. Guest

    Hi. We are having a problem with a 6509 and high cpu utilization.

    The 6509 is running CAT OS, and running cat6000-sup2k8.8-2-2. The
    issue is that the Switch will stop all telnet traffic to it as well as
    kill to console connection. This lasts roughly 10 mins, once we gain
    access to the switch again we see the following using show proc cpu

    89.10% 28.84% 11.68% 0 L3Aging

    It seems L3Aging is what is causing the high CPU utilization, the
    switch however is still passing traffic. It seems to be the MLS Cache
    that is getting dumped then refreshed.

    Does anyone have a clue on what to look for ?

    Thanks
    , Nov 30, 2007
    #1
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  2. On Fri, 30 Nov 2007 04:03:23 -0800 (PST), wrote:
    > Hi. We are having a problem with a 6509 and high cpu utilization.
    >
    > The 6509 is running CAT OS, and running cat6000-sup2k8.8-2-2. The
    > issue is that the Switch will stop all telnet traffic to it as well as
    > kill to console connection. This lasts roughly 10 mins, once we gain
    > access to the switch again we see the following using show proc cpu
    >
    > 89.10% 28.84% 11.68% 0 L3Aging
    >
    > It seems L3Aging is what is causing the high CPU utilization, the
    > switch however is still passing traffic. It seems to be the MLS Cache
    > that is getting dumped then refreshed.
    >
    > Does anyone have a clue on what to look for ?


    route flaps, which will cause you to purge all the flow entries
    already programmed.

    But you really really want to upgrade to IOS and run CEF on it
    instead, so you get a away from cache/flow based routing.

    --
    Jesper Skriver, CCIE #5456
    Jesper Skriver, Nov 30, 2007
    #2
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