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High CPU for cisco 2811

Hi Team,

We are facing issue of high CPU utilisation for Cisco 2811 Router installed in Customer premises and using for Internet connectivity.

Find attached here show tech-support for this Router and suggest us for next step,




High CPU for cisco 2811

Hi Ashutosh,

on you F0/0 you have got following configuration :

ip flow ingress

ip flow egress

ip route-cache same-interface

ip route-cache policy

ip route-cache flow

ip policy route-map Asianet_out

I believe it forces the cisco2811 to process you traffic not in CEF but in CPU, the output of you "sh int f0/0" shows too  mane drops  and errors as well:

FastEthernet0/0 is up, line protocol is up

Input queue: 12/75/46201/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  30 second input rate 8085000 bits/sec, 5676 packets/sec

  30 second output rate 10007000 bits/sec, 1982 packets/sec

     1664261706 packets input, 3721208020 bytes

     Received 4976887 broadcasts, 1 runts, 0 giants, 1397 throttles

     475451 input errors, 6 CRC, 0 frame, 0 overrun, 475444 ignored

are the counters increasing?

High CPU for cisco 2811

and could you please show the output from the command:

"show proc cpu sorted"

just enter it a couple of times in order to see which process takes so much CPU.