High Cpu Utilization

[prateek_jain12]

Dears,

I am seeing High Cpu Utilization on Layer 3 Switch

L3#sh proc cpu |  ex 0.0                                                                                           

CPU utilization for five seconds: 66%/29%; one minute: 68%; five minutes: 68%                                                    

PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process                                                         

  12    14628298    14665951        997  0.47%  0.55%  0.54%   0 ARP Input                                                       

  85    22621780    15197258       1488  0.47%  0.80%  0.85%   0 RedEarth Tx Mana                                                

  91   101243226     1513576      66890  2.23%  2.36%  2.34%   0 Adjust Regions                                                  

107     7724784   117247467         65  3.67%  3.45%  3.35%   0 HLFM address lea                                                

125   293573384   174160026       1685  7.67%  8.24%  8.05%   0 hpm main process                                                

129    39328856     4160564       9452  0.79%  0.90%  0.89%   0 hpm counter proc                                                

169   139560067   101457486       1375 10.39% 11.45% 11.72%   0 Hulc LED Process                                                

181     9792691      825335      11865  0.47%  0.27%  0.26%   0 HQM Stack Proces                                                

214    22859017    40738557        561  5.75%  3.81%  3.62%   0 IP Input   

Pls suggest.

[ALIAOF_]

Is it constantly like that?  You have to look at all the processes and see which process is causing high CPU usage.

[Leo Laohoo]

Would be helpful if you can provide the complete output to the command "sh version". 

[InayathUlla Sharieff]

Hi Prateek,

I believe you are having Cisco 3750 Switch?

The "Hulc LED" process does following tasks:

- Check Link status on every port

- If the switch supports POE, it checks to see if there is a Power Device (PD)

detected

- Check the status of the transceiver

- Update Fan status

- Set Main LED and ports LEDs

- Update both Power Supplies and RPS

- Check on system temperature status

My collegue has recorded complete information on this in  the following link :

https://supportforums.cisco.com/message/3862968#3862968

If In case it is Cisco 4500 device collect the following outputs:

show ver, show log

show platform health

     - show platform cpu stat

show platform cpu packet statistics

HTH

Regards

Inayath

*Plz rate all usefull posts.

[pratik gandhi]

Hi prateek,

From ur cpu processes i can see there is lots of intruppts causing ur cpu hike

Try to remove ur qos policies and then have a look at cpu processes

Sent from Cisco Technical Support iPhone App

[Partha Dasgupta]

Hi Prateek,

As per the output provided it looks like you have software forwarding  going on your CPU.

CPU utilization for five seconds: 66%/29%; one minute: 68%; five minutes: 68% 

125   293573384   174160026       1685  7.67%  8.24%  8.05%   0 hpm main process

214    22859017    40738557        561  5.75%  3.81%  3.62%   0 IP Input

Check your IOS version. you might be hitting with Bug CSCsm26985 3750 misses hardware forwarding information in certain condition

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsm26985&from=summary

[Joseph W. Doherty]

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Posting

If you're doing software forwarding, problem might also be incorrect SDM template (if the device offers SDM choices) for the traffic flowing through the L3 switch.  (It's also possible that nature of traffic can exceed the resources of any available SDM template resulting in software forwarding too.)