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Cisco Bug: CSCsz52301 - SUP720 HIGH CPU SP slcp process and (LC) fw_lcp process

Last Modified

Feb 13, 2018

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases

12.2SXI

Description (partial)

None
Symptom:

After upgrading to 12.33(SXI1), you may see elevated CPU due to the following:
1/ Syslog:
Apr  2 09:10:20: %SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU Utilization(Total/Intr): 100%/0%,
Top 3 processes(Pid/Util):  135/99%, 367/0%, 3/0%

(temporary rising threshold)
2/ Elevated CPU in the SP in the slcp process  

6500#remote command switch sh proc cpu sort | exc 0.00

CPU utilization for five seconds: 34%/4%; one minute: 35%; five minutes: 35%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process 
 104     1090772   1019396       1070 12.63% 14.55% 14.62%   0 slcp process     
 501      199648     87076       2292  6.23%  2.92%  2.74%   0 DiagCard1/-1     
 502      319816    106612       2999  2.87%  4.08%  4.29%   0 DiagCard3/-1     
 505      249532    162539       1535  2.63%  3.58%  3.44%   0 DiagCard8/-1     
 504      233052    148269       1571  2.23%  3.15%  3.16%   0 DiagCard7/-1 
3/ Elevated CPU in the DFC module

6500#remote command module 1 sh proc cpu sort | exc 0.00

CPU utilization for five seconds: 29%/0%; one minute: 28%; five minutes: 28%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process 
 187     2077400    722635       2874 28.15% 27.86% 27.87%   0 fw_lcp process     
Conditions:
At this point in time, it has only been reported in a 6500 IOS with SUP720 with DFC sub-modules
installed.  

You may verify this with

#sh module

<snippet>

Mod  Sub-Module                  Model              Serial       Hw     Status 
---- --------------------------- ------------------ ----------- ------- -------
  1  Distributed Forwarding Card WS-F6700-DFC3BXL   SALxxxxxxxx  5.3    Ok
  3  Distributed Forwarding Card WS-F6700-DFC3CXL   SALxxxxxxxx  1.1    Ok

<end snippet>
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