3560x -48port SWITCH cpu utilization high

[arumugasamy]

Hi,

The switch cpu shows always utilization 35% to 50%. The show processes cpu sorted 5sec shows HULC LED process took more CPU.

This is the process related to SFP phisical link issues. But even after change the SFP, IOS image still this issue remain constant.

Any solution to this issue.

Thx

[InayathUlla Sharieff]

Symptom:

Hulc LED Process uses 15-30% CPU on Catalyst 3560X/3750X platforms.

Conditions:

The is seen in 12.2(53)SE releases or later.

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

IOS:

3750/3600 series:-I recommend a "stable" IOS, then 12.2(55)SE7 .  This is followed by 15.0(2)SE2(If you required 802.1x support) else 12.2(55)SE7 is the best.

HTH

Regards

Inayath

***Plz rate if this info is helpfull.

[gwes]

This issue was first seen on 3750/3560 switches and fixed, but on the newer type switches 3750-x or 2960's this has not been fixed yet.

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsi78581