Cisco C2960X CPU Utilization is >90%

[preetpeethambaran]

In Cisco C2960X, CPU utilization is going to >90% 

Current Switch IOS version is 15.2(2)E.

[Mark Malone]

Your hitting a know bug HULC its ion most platforms , you will need to move to an IOS its not in

160 1782793392 158371875 11257 31.25% 35.53% 36.57% 0

Hulc LED Process Cisco Bug: CSCtg86211 - Hulc LED Process uses 6-23% CPU on Catalyst 2960/2960S/2960X switch Last Modified Apr 06, 2016 Product Cisco Catalyst 2960 Series Switches Known Affected Releases 12.2(50)SE3 Description (partial) 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. View Bug Details in Bug Search Tool Login Required Why Is Login Required?

[Mark Malone]

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

Last Modified: Apr 19,2016 Status: Terminated Severity: 3 Moderate Product: Cisco Catalyst 2960 Series Switches Support Cases: 235 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

[preetpeethambaran]

This cpu utilization is not always in peak, but this is going down and up frequently.

[Mark Malone]

One third of your cpu is hit by that bug HULC 36% , if it wasn't there your cpu would less than 60% from the output you gave which would be normal enough , are you saying when its high other times that's not the process causing it ? if so need the show proc from that time to see what was the cause as its real time cpu traffic