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New Member

C4500 - High CPU - Supervisor II-PLUS-10GE - IOS 12.2(31r)SG3

We have two c4500 with above characteristics.

The cpu usage is even more higher when I apply a voice ACL on the on of the switches, more than other.

The peak is at Lopri processes.

I attached the show procc cpu and sh platform health.

When I apply a ACL the cpu utilization is 90%.

In my show log I have detected only one error duplex mismatch. The network is operating normally now, but I disabled the ACL on the other switch because than the CPU spikes. The same ACL is working fine on the other switch.

Thanks in advance.                  

Everyone's tags (7)
New Member

Re: C4500 - High CPU - Supervisor II-PLUS-10GE - IOS 12.2(31r)SG

I have attached another show cpu and platform output with the 70% usage. The ACL is not active, but still big usage.

The process is K2CpuMan Review and K2AccelPacketMan: Tx are using more then used to.

New Member

Re: C4500 - High CPU - Supervisor II-PLUS-10GE - IOS 12.2(31r)SG

The proccess K2CpuMan has greatly devolved to a normal stage when I typed in the comand:

no ip unreachables on voice vlan interface

I am reading now on what are the side effects of this command.

This command stopped sending back to the cpu ICMP packets for the denied packets in the ACL.

That used a lot of cpu utilization.

Any suggestion is much appreaciated.