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CATALYST 4000 HIGH CPU UTILIZATION

Helo!

Could anyone, please, help me to figure out why do I have such a big CPU utilization on my Catalyst 4000 (see attached file with commands output)? Also, while telnetting to switch it's so slow to put or get something from switch.

Thank you in advance,

Viktor

2 REPLIES
Cisco Employee

Re: CATALYST 4000 HIGH CPU UTILIZATION

High CPU is in "Packet forwardi" process. I am suspecting there is excessive broadcast/multicast/unknown unicast traffic in the network. You have most ports in VLAN 1 which is aggravating this as well.

New Member

Re: CATALYST 4000 HIGH CPU UTILIZATION

Thank you. Yes, we found one port causing this. After we disconnetcted it utilization now is 20%. Thanks a lot, Viktor

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