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Cisco 4948 High CPU

halsteadj
Level 1
Level 1

Hi,

I have a 4948 device that is running at very high CPU:

CPU utilization for five seconds: 90%/16%; one minute: 89%; five minutes: 85%

5Sec   1Min   5Min TTY Process

66.39% 65.04% 59.44%   0 Cat4k Mgmt LoPri

I have followed the 'High CPU on 4500' chassis document and identified this CPU queue is getting hit the most 'L3 Fwd Low'

Queue                  Total                5 sec avg 1 min avg 5 min avg 1 hour avg

L3 Fwd Low           60268545567      9909     13750      7860      11201

This indicates an issue with ICMP redirects, however turning this off had No effect. 

I have therefore tun a monitor on the CPU using these commands:

monitor session 1 source cpu queue 3 - 5 rx

monitor session 1 destination interface Gi1/27

However, when I view the packet capture for a 2 minute period I am only seeing about 300 packets.  Has anyone got any ideas about why, or what type of packets would not be showing on a packet capture, yet still be shown in the IOS?

1 Reply 1

kapathak
Cisco Employee
Cisco Employee

Hi James,.

Can you attach the running-config ? Also, are we seeing any errors in the logs?

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