I have four 2960 switches that have the same "problem" that is : their
CPU couter is always at 20%.

Result of a "sh proc cpu | excl 0.00%  0.00%  0.00%" :

-------------------------------
CPU utilization for five seconds: 20%/1%; one minute: 18%; five
minutes: 18%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
   4       25706      7904       3252  0.00%  0.02%  0.00%   0 Check
heaps
   9       69647    393005        177  0.15%  0.13%  0.11%   0 ARP
Input
  15       11134     23296        477  0.15%  0.04%  0.01%   0 HC
Counter Timer
  23        4266      1774       2404  0.15%  0.03%  0.00%   0 Logger
  28       12382    291453         42  0.00%  0.01%  0.00%   0 Net
Input
  29       26351     15572       1692  0.00%  0.02%  0.04%   0 Compute
load avg
  37       68213   4014589         16  0.00%  0.07%  0.11%   0 Fifo
Error Detec
  51        6369   2333729          2  0.00%  0.01%  0.00%   0 HLFM
address ret
  61        3079     34723         88  0.31%  0.07%  0.04%   0 hpm
main process
  64       15682     77252        202  0.00%  0.02%  0.02%   0 hpm
counter proc
  86     3299591   1775954       1857 13.09% 12.41% 12.20%   0 Hulc
LED Process
  90       29268     15554       1881  0.00%  0.04%  0.02%   0 HQM
Stack Proces
 129       12432    115997        107  0.00%  0.01%  0.04%   0
Spanning Tree
 174       10288     32491        316  0.00%  0.02%  0.00%   0 IP SNMP
 176       13856     16245        852  0.00%  0.01%  0.00%   0 SNMP
ENGINE
-------------------------------

we notice that the process "Hulc LED Process" is getting most of the
cpu time... strange....

I tried to change the display mode on the frontend of the switch
(DUPLEX display instead of activity display) and this process stop
getting cpu time... But, I can't let the display on "duplex mode" or
"speed mode", after 30 seconds, the switch changes the display mode
automaticaly to "activity mode".

I've done a lot of debug trace and network trace, and notice nothing
special. But there must be something wrong....

I have several others switch (same 2960 with the same IOS), and no
problem !?!

Is there someone with the same problem ?
Is there a way to force the switch to stay in Duplex or speed display
mode to avoid this ?
Is this a known bug ?

Thanks in advance for your help.

H.

PS : Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version
12.2(37)SE1, RELEASE SOFTWARE (fc1)