[afnog] High CPU Utilization Problem on 2-Stacked Cisco Switches.

[Michael Komla Nfodzo]

Hi Folks,

 

The process(HLFM address ret)  is causing High CPU utilization problem
on my 2-stacked switches and is highlighted in yellow below.  As you can
see, the interrupt (traffic load) is 1%

 

SWITCH#sh processes cpu sorted

CPU utilization for five seconds: 73%/1%; one minute: 75%; five minutes:
75%

 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

  79   108148177  18204966       5940 40.50% 39.73% 40.06%   0 HLFM
address ret

  77    49170833  18188441       2703 11.96% 12.04% 11.80%   0 HLFM
address lea

 210    91092894  92627097        983 11.32% 12.28% 12.16%   0 Spanning
Tree

 158     6366403    717000       8879  0.79%  0.85%  0.83%   0 PI MATM
Aging Pr

  95     3398489   8667452        392  0.63%  0.47%  0.54%   0 hpm main
process

  65       23502    717433         32  0.15%  0.02%  0.00%   0 hrpc ->
response

 204      176891    657388        269  0.15%  0.03%  0.00%   0 IP Input

 254         332      1844        180  0.15%  0.01%  0.00%   0 LOCAL AAA

 145      116015    145565        796  0.15%  0.05%  0.04%   0 HQM Stack
Proces

 251      221202   6989965         31  0.15%  0.03%  0.01%   0 MDFS RP
process

 247      398642   1433988        277  0.15%  0.04%  0.04%   0 DHCPD
Receive

  63      909432  35245712         25  0.15%  0.34%  0.32%   0 Fifo
Error Detec

 106        5590    507690         11  0.15%  0.01%  0.00%   0 hl3mm

 189       41378   7067786          5  0.15%  0.01%  0.00%   0 MDFS MFIB
Proces

 300      249905   3757408         66  0.15%  0.07%  0.06%   0 LACP
Protocol

  45      472240    373473       1264  0.15%  0.10%  0.12%   0 SFF8472

 112         310        72       4305  0.15%  0.35%  0.07%   1 SSH
Process

 197      117443    316120        371  0.15%  0.04%  0.01%   0 CDP
Protocol

  18           0         1          0  0.00%  0.00%  0.00%   0 IPC Zone
Manager

  19        4328    717518          6  0.00%  0.00%  0.00%   0 IPC
Periodic Tim

 

When the CPU utilization is 99/100% and we re-start the switch it drops
to about 20-30% and remains like that until something happens again. We
can't really point out what exactly is the cause.

 

Can someone please assist me with a permanent resolution to this
problem.

 

Regards

Michael

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