High CPU Utilization - Cisco 2960X switch

[Ganesh Prasad Gupta]

Hi Friends,

I am facing high CPU utilization issue in cisco 2960X switch.

Please go through the below log

switch#show processes cpu monitor | exc 0.0
CPU utilization for five seconds: 80%/1%; one minute: 80%; five minutes: 80%
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
 160   967585239   320640728       3017 58.28% 58.50% 58.58%   0 Hulc LED Process
 218   127173668   460391237        276  1.08%  0.96%  0.95%   0 Spanning Tree
 125         834         802       1039  1.01%  0.42%  0.18%   1 SSH Process
 130    63925216    12915197       4949  0.78%  0.73%  0.72%   0 hpm counter proc
 231    23800851    12818335       1856  0.41%  0.46%  0.46%   0 PI MATM Aging Pr
   6    22790122     2397018       9507  0.35%  0.16%  0.12%   0 Check heaps
  89    20313684   495743197         40  0.23%  0.24%  0.24%   0 RedEarth Rx Mana
  88    19201526   493309651         38  0.23%  0.30%  0.30%   0 RedEarth Tx Mana
 191     9736765    12096529        804  0.17%  0.15%  0.17%   0 CDP Protocol
 172    24084773    15379662       1566  0.17%  0.15%  0.17%   0 HRPC qos request
  98     6488182    64554392        100  0.11%  0.13%  0.12%   0 apm86xxx_enet_pr
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process

Please suggest the cause and solution for this.

As this switch is running in stack with IOS image: c2960x-universalk9-mz.152-2.E5.bin.

Thanks

Ganesh Prasad Gupta

[Mark Malone · Accepted solution]

Hi

that's a known issue on these platforms  , if you search the forum its been opened quite a few times , seems very high though on your output I would move off that ios version to start with

c2960x-universalk9-mz.152-2.E6.bin

Symptom:
Hulc LED Process uses 6-23% CPU on Catalyst 2960/2960S/2960X 24 or 48-port switch.

Conditions:
The CPU utilization for Hulc LED Process will be in the 6-23% range for the
Catalyst 2960 series like 2960, 2960S, 2960X switch models.

For WS-C2960X-48LPS-L which is 48ports PoE 2960X switch Hulc LED Process
Could reach about 22%-23%.

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

[VKPrasad]

Hey Mark,

That response was helpful.

I was just wondering is this known issue fixed in any of the latest version.