Cisco Router high cpu utilization

[fgasimzade]

We've got Cisco 2821 for our 90mb/s Internet Access. Its CPU usage is around 80%. Show process cpu does not show any cpu proccess with high utilization. But we have got plenty of policing configured for our clients using policy maps. Can this policing affect cpu usage?

Thank you!

[Giuseppe Larosa · Accepted solution]

Hello Fgasimzade,

C2821 is a software based router so the traffic volume processed involves main cpu utilization.

By the way C2821 is considered good for 87 Mbps half duplex (CEF switched with no features)

The use of features like ACLs, NAT and so on increases the cpu usage as you noted

Said this, your router is just behaving as expected for its performance see attached fle.

Hope to help

Giuseppe