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CPU utilization on a C1720 Router

I have a C1720 router with 1 FE interface and 1 serial T1 interface. The CPU runs between 20 - 25% utilization but gets pegged at 100% at least once every minute. It usually last between 5 - 10 seconds and I am trying to pin down what is causing it.

It is running 12.3 IP BASE code and has QOS enabled on both the LAN and WAN interface.

When I use the sho proc cpu sorted command IP INPUT is at the top and by far the most active pocess. Is this the QOS or is it something else?

Any thoughts would be appreciated.

2 REPLIES
Hall of Fame Super Bronze

Re: CPU utilization on a C1720 Router

Are the output drops incrementing under the serial interface?

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Edison.

Super Bronze

Re: CPU utilization on a C1720 Router

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