Ciso 2960x High CPU Usage

[aheredia05]

Hello,

i have a cisco 2960x series switch, this has been generating high usage of cpu, this is the output of show proc cpu sort 5sec command:

CPU utilization for five seconds: 61%/27%; one minute: 61%; five minutes: 70%
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
 162    62838330     8258259       7609 16.37% 15.80% 14.94%   0 Hulc LED Proces                                                                                       s
 127     1722756     4676416        368  1.55%  1.55%  1.62%   0 hpm main proces                                                                                       s
  60      407992    11454431         35  0.77%  0.65%  0.85%   0 Net Input                                                                                             
 207        5197       81111         64  0.35%  0.05%  0.01%   0 IP Input                                                                                              
 168         603         895        673  0.23%  0.09%  0.05%   6 SSH Process                                                                                           
  92       98568    15203497          6  0.17%  0.12%  0.14%   0 RedEarth Rx Man                                                                                       a
  91      104838    15200378          6  0.17%  0.10%  0.11%   0 RedEarth Tx Man                                                                                       a

i do not know why hulc led proces it is using too much cpu, and the 61%/27% it is too much time in interrupt time.

sorry for my english.

regards

[rakeshvelagala · Accepted solution]

Hi 

You may be hitting the below bug

Hulc LED Process uses 10-15% CPU on Catalyst 2960/2960S 24 or 48-port switch.

Conditions:

The CPU utilization for Hulc LED Process will be in the 10-15% range for the
following switch models.

* WS-C2960-48PST-L
* WS-C2960-24LC-S 
* WS-C2960-24PC-S 
* WS-C2960-48PST-S
* WS-C2960S-48TS-S
* WS-C2960S-24TS-S
* WS-C2960S-24TS-L
* WS-C2960S-48TS-L

The is seen in 12.2(50)SE03 or later releases.

Workaround:

This is an expected behavior and there is no workaround.

Further Problem Description: 

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
 

Customer Visible

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Details

Last Modified:

May 6,2015

Status:

Terminated

Severity:

3 Moderate

Product:

Cisco Catalyst 2960 Series Switches

Support Cases:

204

Known Affected Releases:

(1)

12.2(50)SE3

Known Fixed Releases:

(0)

No release planned to fix this bug

Download software for  Cisco Catalyst 2960 Series Switches

Community Discussion on CSCtg86211 - Cisco Support Community

[aheredia05]

hi rakesh velagala,
thanks for your rapid response, i guess i have to wait untill cisco fixes the bug.

sorry for my bad english.
regards.