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New Member

Help > High CPU Utilization on switch 2960

Hi guys I am a new network engineer on a retail company and I am having a problem on the High utilization of my 3-stack switch 2960 only during Peak Hours of the Store Sales.

Help me guys how to start the troubleshooting or just finding the root cause of the issue.

Note: on Peak hours, it is peaking at 90-95 %

here is the utilization after Peak hours:

    4444333334444433333333333333333333333333333333333333333333

    0000777772222277777666664444499999777775555555555777777777

100

90

80

70

60

50

40 ************************     *****************************

30 **********************************************************

20 **********************************************************

10 **********************************************************

   0....5....1....1....2....2....3....3....4....4....5....5....

             0    5    0    5    0    5    0    5    0    5

               CPU% per second (last 60 seconds)

    5444477444444444444444444444444444444444449944474494448884

    2613722302521251534141155214351414281521729996297532323006

100                                           **

90                                           **      *

80                                           **   *  *   ***

70      **                                   **   *  *   ***

60      #*                                   **   *  *   ***

50 **  *#*   *   * *      **    *     * *  * ##** ***#   #***

40 ##########################################################

30 ##########################################################

20 ##########################################################

10 ##########################################################

   0....5....1....1....2....2....3....3....4....4....5....5....

             0    5    0    5    0    5    0    5    0    5

               CPU% per minute (last 60 minutes)

              * = maximum CPU%   # = average CPU%

    9888888877778778887887787878888888887878778878878787887877778889778777

    9018162299883990028209808094001641268290884183080908289199984044980898

100 *

90 *  * *                         *   *                 *         *

80 **********************************************************************

70 *###**#############################################*##################

60 *####*################################################################

50 ######################################################################

40 ######################################################################

30 ######################################################################

20 ######################################################################

10 ######################################################################

   0....5....1....1....2....2....3....3....4....4....5....5....6....6....7.

             0    5    0    5    0    5    0    5    0    5    0    5    0

                   CPU% per hour (last 72 hours)

                  * = maximum CPU%   # = average CPU%

4 REPLIES
Cisco Employee

Help > High CPU Utilization on switch 2960

Hi Axel,

please refer to this guide to troubleshoot high CPU condition on DSBU switches (2960 has similar architecture of 3750 so this guide applies to your switch too).

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/troubleshooting/cpu_util.html

Riccardo

Purple

Help > High CPU Utilization on switch 2960

  Also look for bugs in the version you are using the bug toolkit .  There have code issues in the past with similar units and it's been a code issue .  Do a show proc cpu sort and see what the biggest user is .

New Member

Help > High CPU Utilization on switch 2960

Hi Guys,

Here is the cpu level during Peak Hours.

@Riccardo thanks for the reference but I could not see the root cause of the issue on that docu..

    3333377777777777777777777777777777766667777766666666666666

    3333300000222220000000000111112222299991111188888555559999

100

90

80

70      *****************************************************

60      *****************************************************

50      *****************************************************

40      *****************************************************

30 **********************************************************

20 **********************************************************

10 **********************************************************

   0....5....1....1....2....2....3....3....4....4....5....5....

             0    5    0    5    0    5    0    5    0    5

               CPU% per second (last 60 seconds)

    7777777777777777777787777777777777777777777777777777777777

    2648345456554653365508665445554456534664383566543655556436

100

90

80  * *  * **** **  ********  ***  ***  **  * ****  ******  *

70 ##########################################################

60 ##########################################################

50 ##########################################################

40 ##########################################################

30 ##########################################################

20 ##########################################################

10 ##########################################################

   0....5....1....1....2....2....3....3....4....4....5....5....

             0    5    0    5    0    5    0    5    0    5

               CPU% per minute (last 60 minutes)

              * = maximum CPU%   # = average CPU%

    8887877777887787887887778888888887777887777787887789877888778887797787

    0328389899019737207368980220175426887278887828838700787722772137948639

100

90                     *        **       *       *    **  *         *

80 **********************************************************************

70 ######################################################################

60 ######################################################################

50 ######################################################################

40 ######################################################################

30 ######################################################################

20 ######################################################################

10 ######################################################################

   0....5....1....1....2....2....3....3....4....4....5....5....6....6....7.

             0    5    0    5    0    5    0    5    0    5    0    5    0

                   CPU% per hour (last 72 hours)

                  * = maximum CPU%   # = average CPU%

-----------------------------------------------------------------------------------------------------------------------------------------------

CPU utilization for five seconds: 35%/10%; one minute: 51%; five minutes: 65%

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

136  3145029520 278301852      11300 17.09% 17.61% 17.48%   0 Hulc LED Process

105   168018946  30730056       5467  1.19%  0.97%  0.95%   0 hpm counter proc

190   287984354  84721905       3399  0.99%  1.35%  1.43%   0 Spanning Tree

146    29735054  17852521       1665  0.29%  0.18%  0.17%   0 HRPC qos request

145    39258409   2978472      13180  0.19%  0.22%  0.21%   0 HQM Stack Proces

106    11764285  63445692        185  0.19%  0.10%  0.09%   0 HRPC pm-counters

  37    25174121  14854487       1694  0.09%  0.12%  0.11%   0 Per-Second Jobs

140         346       168       2059  0.09%  0.17%  0.07%   1 SSH Process

  74    17867785  73877403        241  0.09%  0.08%  0.09%   0 hrpc <- response

  43     5373851   2979714       1803  0.09%  0.03%  0.03%   0 Compute load avg

204     5070516  14854389        341  0.09%  0.02%  0.00%   0 PI MATM Aging Pr

101    19749930 138153106        142  0.09%  0.09%  0.09%   0 hpm main process

  13           0         1          0  0.00%  0.00%  0.00%   0 Policy Manager

  12           0         2          0  0.00%  0.00%  0.00%   0 AAA high-capacit

  15           0         1          0  0.00%  0.00%  0.00%   0 IFS Agent Manage

  11           0         1          0  0.00%  0.00%  0.00%   0 AAA_SERVER_DEADT

  14         132         6      22000  0.00%  0.00%  0.00%   0 Entity MIB API

  18      238166  14854590         16  0.00%  0.00%  0.00%   0 IPC Periodic Tim

  16        4778    248525         19  0.00%  0.00%  0.00%   0 IPC Dynamic Cach

  20      213487  14854593         14  0.00%  0.00%  0.00%   0 IPC Deferred Por

  21          27        48        562  0.00%  0.00%  0.00%   0 IPC Seat Manager

New Member

Help > High CPU Utilization on switch 2960

Also,

Here are the Highest talkers on the lan:

  Interface                    IHQ   IQD  OHQ   OQD  RXBS RXPS  TXBS TXPS TRTL

-------------------------------------------------------------------------

* Vlan1                           0     0    0     0  2000    2  2000    2    0

* GigabitEthernet1/0/1     0     0    0     3 30000   26 61000   46    0

* GigabitEthernet1/0/2     0     0    0     1 19000   17  6000    6    0

* GigabitEthernet1/0/3     0     0    0     0  3000    3  5000    6    0

* GigabitEthernet1/0/5     0     0    0   337  4000    3  5000    5    0

* GigabitEthernet1/0/6     0     0    0     0  3000    2  4000    5    0

* GigabitEthernet1/0/7     0     0    0   390  4000    3  5000    6    0

* GigabitEthernet1/0/9     0     0    0   353  4000    3  5000    6    0

* GigabitEthernet1/0/10    0     0    0   328  3000    2  5000    6    0

* GigabitEthernet1/0/11    0     0    0     0  4000    3  5000    5    0

* GigabitEthernet1/0/22    0     0    0   177     0    0 92000   53    0

* GigabitEthernet1/0/29    0     0    0     0     0    0 93000   54    0

* GigabitEthernet1/0/30    0     0    0     0 13000    9 257000   21    0

* GigabitEthernet1/0/38    0     0    0     0     0    0 20000   16    0

* GigabitEthernet1/0/39    0     0    0     0  4000    3 25000   27    0

* GigabitEthernet1/0/40    0     0    0     0 15000   16 127000   37    0

* GigabitEthernet1/0/41    0     0    0     0  2000    0 28000   27    0

* GigabitEthernet1/0/42    0     0    0     0  1000    0 28000   28    0

* GigabitEthernet1/0/43    0     0    0 2157413 13000   13 69000   39    0

* GigabitEthernet1/0/44    0     0    0     0  2000    1 28000   26    0

* GigabitEthernet1/0/45    0     0    0     0     0    0 28000   27    0

* GigabitEthernet1/0/46    0     0    0     0  2000    3 27000   28    0

* GigabitEthernet1/0/47    0     0    0     0 89000   51     0    0    0

* GigabitEthernet1/0/48    0     0    0   888 3213000  313 2686000  314    0

* GigabitEthernet2/0/7      0     0    0     8     0    0 64000   47    0

* GigabitEthernet2/0/14    0     0    0   408  5000    3 16000    5    0

* GigabitEthernet2/0/38    0     0    0     0 2492000  201     0    0    0

* GigabitEthernet2/0/39    0     0    0     0  1000    0 35000   26    0

* GigabitEthernet2/0/41    0     0    0     0  6000    3 34000   38    0

* GigabitEthernet2/0/42    0     0    0     0     0    0 34000   37    0

* GigabitEthernet2/0/43    0     0    0     0 18000    0 57000   32    0

* GigabitEthernet2/0/44    0     0    0     0     0    0 37000   30    0

* GigabitEthernet2/0/45    0     0    0     0     0    0 36000   21    0

* GigabitEthernet3/0/4      0     0    0     0     0    0 18000    1    0

* GigabitEthernet3/0/5      0     0    0     0     0    0 79000   24    0

* GigabitEthernet3/0/13    0     0    0     0     0    0 18000    1    0

* GigabitEthernet3/0/14    0     0    0   782     0    0 18000    1    0

* GigabitEthernet3/0/16    0     0    0     0  1000    1 18000    1    0

* GigabitEthernet3/0/21    0     0    0     0 1574000  181 35000   63    0

* GigabitEthernet3/0/26    0     0    0     0     0    0 107000   48    0

* GigabitEthernet3/0/28    0     0    0     0 60824000  5017 403000  741    0

* GigabitEthernet3/0/29    0     0    0     0     0    0 2533000  207    0

* GigabitEthernet3/0/33    0     0    0     0     0    0 1604000  181    0

* GigabitEthernet3/0/34    0     0    0     0 58000  100 2535000  220    0

* GigabitEthernet3/0/36    0     0    0     3 401000  740 63358000  5238    0

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