We have 2960X's running 15.2(3)E with high CPU usage (75%/27%)
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 52 WS-C2960X-48FPS-L 15.2(3)E C2960X-UNIVERSALK9-M
2 52 WS-C2960X-48FPS-L 15.2(3)E C2960X-UNIVERSALK9-M
VoIP calls for anyone on this switch have clicks, delay, and often no dial tone.
I see high CPU utilization seems to have been an issue for a couple years. We have several 2960x stacks but have only seen this issue on this stack. All 2960x switches are running 15.2(3)E.
hi yes seen that before on 3750s thats a bug , it effects 2960 as well , no workaround in Cisco bug but there is one in the link provided , whats your IOS version ?
https://tools.cisco.com/bugsearch/bug/CSCsi78581 3750 says its basically fictitious that it does not effect your hardware
2960 bug release
Hulc LED Process uses 6-15% CPU on Catalyst 2960/2960S 24/48-port switch
it does not look like that bug exists in the suggested IOS version release for your model below but there is a couple of other hulc bugs but you might not trigger them depending on your setup