High Interrupt load with Catalyst 3550

Discussion in 'Cisco' started by Sebastian Faerber, Nov 25, 2003.

  1. Hello,

    we recently deployed a Cisco Catalyst 3550-12T as our uplink switch.
    We are speaking BGP with our uplink for redundancy reasons.

    The problem we are expiriencing is that the switch has a very high interrupt
    CPU utilization for five seconds: 99%/95%; one minute: 99%; five minutes:

    But the uplink carries only about 70Mbit/s at the moment.

    I think something has to be totally wrong with our config since the switch
    be able to route / switch much more traffic.

    We already tried disabling our access-lists on the WAN-Interface but
    interrupt load
    still remained at about 70%.
    CEF is per default enabled on all interfaces.

    I've attached our configuration, any suggestions how to tune it ?

    Best Regards,

    Sebastian Faerber


    no ip subnet-zero
    ip routing
    spanning-tree mode pvst
    spanning-tree extend system-id
    interface GigabitEthernet0/1
    description WAN
    no switchport
    ip address
    ip access-group incoming in
    ip access-group outgoing out
    duplex full
    speed 100
    interface GigabitEthernet0/10
    description LAN
    no switchport
    mac-address 0080.c8b9.f556
    ip address secondary
    ip address secondary
    ip address
    router bgp 9999
    bgp log-neighbor-changes
    network mask
    network mask
    network mask
    neighbor remote-as 1234
    neighbor update-source GigabitEthernet0/1
    neighbor weight 32768
    neighbor maximum-prefix 2
    ip classless
    no ip http server
    ip access-list extended incoming
    ... about 20 entries
    ip access-list extended outgoing
    ... about 5 entries
    Sebastian Faerber, Nov 25, 2003
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