CPU high utilization

[Shi-packet-life]

Hi,

New switch installed in our network shows 55-60 %(some time even 1 minute 60%) process utilization always dont know why .. nothing unusual in the logs and configuration

below information is switch info please help if any members had gone thru the same and know why.

thanks

Directory of flash:/

  583  -rwx        4120   Oct 7 2010 14:11:55 +04:00  multiple-fs
    2  -rwx         796   Mar 1 1993 04:01:23 +04:00  vlan.dat
    3  -rwx        3804   Mar 1 1993 04:01:48 +04:00  private-config.text
    5  -rwx       21172   Mar 1 1993 04:01:47 +04:00  config.text
    6  drwx         512   Mar 1 1993 04:27:04 +04:00  c2960s-universalk9-mz.122-53.SE2

CPU utilization for five seconds: 20%/0%; one minute: 39%; five minutes: 55%

NAME: "1", DESCR: "WS-C2960S-48FPS-L"
PID: WS-C2960S-48FPS-L , VID: V01  , SN: FOC1432Z4DU

[jonathanaxford]

Hi,

Have you run the Show Processes CPU command to see what that says? It may point towards the specific process that is causing the high CPU utilisation.

Hope this helps,

Jonathan

[Shi-packet-life]

thanks for your reply

except below process all other process seems normal

133    51062274   8261056       6181 12.19% 12.81% 12.78%   0 Hulc LED Process

[jonathanaxford]

Hi,

I have found the following post which relates to the LED Process:

https://supportforums.cisco.com/message/608643

Seems that the percentage you are seeing is considered normal behaviour with regards to the Hulc LED Process on a 2960, are you noticing any performance problems that you think may be related to the CPU utilisation?

Many thanks

Jonathan

[JunKun Kwon]

Hi.

We have same problem.

We installed six 2960S.

All switch is high CPU.

CPU utilization for five seconds: 63%/40%; one minute: 44%; five minutes: 59%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
   1           0         7          0  0.00%  0.00%  0.00%   0 Chunk Manager   
   2        7233    395600         18  0.00%  0.00%  0.00%   0 Load Meter      
   3        2460      1250       1968  0.00%  0.00%  0.00%   0 SpanTree Helper

I think maybe IOS bug.

We plan to upgrade IOS to 12.2(55)SE.

If we sloved this problem and I will tell you.

thanks.

[maker]

Hi JunKun Kwon,

the upgrade to IOS 12.2(55)SE. did this solve the issue on the 2960s?

Kind regards,

Matthias

JunKun Kwon

[JunKun Kwon]

Hi, Maker.

We plan to upgrade Nov.18.

Using six 2960-S is high CPU.

We buy two new 2960-S.

But this swich idle status is nomal CPU.

So, we testing more now before upgrade to 12.2(55)

[tverhell]

Hi JunKun,

You might be running into one of these 2 bugs:

CSCtg86211    Hulc LED Process uses 6-15% CPU on Catalyst 2960/2960S 24/48-port switch

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtg86211

-> expected behaviour

CSCth24278 Bug Details High CPU when no Console/VTY activity

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCth24278

-> will be in next 12.2SE release, 12.2(58)SE

Rgds,

Tom

[maker]

Hi JunKun,

how was the upgrade? Did it solve the issue?

Kind regards,

Matthías

[JunKun Kwon]

Hi maker.

I had case opened for this issue.

When I receive an answer from Tac.

I will tell you.

Thanks.

[JunKun Kwon]

Hi, maker.

I was received result of this case from TAC.

See the below.

--------------------------------------------------------------------------------------------------------------------------------------

Bug still keep Release-Pending.

It means our Development Engineer keep on touch this issue and investigate further.

Regarding to the bug, I was just informed that the fix for this issue

will be integrated in 12.2(58)SE, and the approximate time is March,2011.

What’s more, the issue is cosmetic and has no impact to the system's

functionality and performance, according to the confirmation from our Develop team.

--------------------------------------------------------------------------------------------------------------------------------------

Thanks.

[tverhell]

Correct JunKun,

this is purely cosmetic issue.

Have verified this as well in lab,

and this is also explained on the bug details on CCO:

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCth24278

Tom

[JunKun Kwon]

Thank you, Tom.

[dipesh.kansara]

I have tried 12.2 58 version on 2960S. High CPU Utilisation issue is fixed but there is another problem. Master reloads when we have SSH and Login Banners turned on. I disabled the banner which stopped rebooting the master but it started again.

Looks like 12.2 55 and 58 both are not stable versions.

Not sure which IOS to use now. Any suggestion?

[Jerry Ye]

You can try 12.2(58)SE1. 12.2(58)SE got deferred yesterday.

HTH,

jerry