2950 is experiencing high CPU utilization

Unanswered Question
Dec 10th, 2011

Hi Experts,

I am experiencing high cpu utilization in my 29501 switch. please see the copied sh process cpu output.

CPU utilization for five seconds: 99%/95%; one minute: 89%; five minutes: 37%

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

   1           0         2          0  0.00%  0.00%  0.00%   0 Chunk Manager

   2        2484    242827         10  0.00%  0.00%  0.00%   0 Load Meter

   3        2584      2100       1230  0.00%  0.00%  0.00%   0 SpanTree Helper

   4       16888  22547063          0  0.00%  0.00%  0.00%   0 Next Page

   5      346608    123642       2803  0.00%  0.01%  0.00%   0 Check heaps

   6        1088       588       1850  0.00%  0.00%  0.00%   0 Pool Manager

   7           0         2          0  0.00%  0.00%  0.00%   0 Timers

   8          88         4      22000  0.00%  0.00%  0.00%   0 Entity MIB API

   9       21520    242809         88  0.00%  0.00%  0.00%   0 HC Counter Timer

  10     1034464   2816159        367  0.15%  0.07%  0.07%   0 ARP Input

  11        4860     44848        108  0.00%  0.00%  0.00%   0 Net Input

  12           0         1          0  0.00%  0.00%  0.00%   0 Critical Bkgnd

  13      747948    500812       1493  0.07%  0.04%  0.02%   0 Net Background

  14       85980    305900        281  0.00%  0.04%  0.01%   0 Logger

  15       94108   1196713         78  0.00%  0.04%  0.05%   0 TTY Background

  16       54336   1196722         45  0.00%  0.00%  0.00%   0 Per-Second Jobs

  17       60984    242833        251  0.07%  0.03%  0.01%   0 Compute load avg

  18      174232     20285       8589  0.00%  0.01%  0.00%   0 Per-minute Jobs

  19           0       105          0  0.00%  0.00%  0.00%   0 AggMgr Process

  20           0         2          0  0.00%  0.00%  0.00%   0 Calhoun Storm Co

  21     9035560  29107827        310  0.60%  0.54%  0.63%   0 Calhoun LED Proc

  22     9546192   2375105       4019  0.52%  0.50%  0.65%   0 Calhoun Statisti

23        8900   5904889          1  0.00%  0.00%  0.00%   0 HMATM Learn proc

24     2736720  27441737         99  0.00%  0.03%  0.05%   0 CalhounPM

25       90692   5905374         15  0.15%  0.13%  0.06%   0 Link Status Proc

26           0         1          0  0.00%  0.00%  0.00%   0 CalhounInsIpopti

27           0         1          0  0.00%  0.00%  0.00%   0 Calhoun DHCP Sno

28      427848    325596       1314  0.00%  0.02%  0.00%   0 CDP Protocol

29         140     10145         13  0.00%  0.00%  0.00%   0 DHCP Snooping

30     9775828    767336      12739  0.15%  0.31%  0.20%   0 IP Input

31      407984    443833        919  0.07%  0.03%  0.00%   0 DTP Protocol

32        6672    121439         54  0.00%  0.00%  0.00%   0 Ethchnl

33          24        57        421  0.00%  0.00%  0.00%   0 VLAN Manager

34           0         2          0  0.00%  0.00%  0.00%   0 PI MATM Aging Pr

35         572      1764        324  0.00%  0.00%  0.00%   0 VMATM Callback

36     7746824   2763240       2803  0.38%  0.24%  0.27%   0 Spanning Tree

37       12224   1217532         10  0.07%  0.01%  0.00%   0 UDLD

38         520     20293         25  0.00%  0.00%  0.00%   0 Port-Security

39       12252     15504        790  0.00%  0.00%  0.00%   0 DHCPD Receive

40           0         1          0  0.00%  0.00%  0.00%   0 HTTP Timer

41        1812      4322        419  0.00%  0.00%  0.00%   0 RARP Input

42        2240     10353        216  0.00%  0.00%  0.00%   0 TCP Timer

43         220       100       2200  0.00%  0.00%  0.00%   0 TCP Protocols

44           0         1          0  0.00%  0.00%  0.00%   0 Socket Timers

45         224      1249        179  0.00%  0.00%  0.00%   0 L2MM

46           0         1          0  0.00%  0.00%  0.00%   0 MRD

47        2496      7692        324  0.00%  0.00%  0.00%   0 IGMPSN

48           0         1          0  0.00%  0.00%  0.00%   0 IGMP Snooping Pr

49        2668      8851        301  0.00%  0.00%  0.00%   0 IGMP Snooping Re

50       20172     94525        213  0.00%  0.00%  0.00%   0 IP Multicast Dat

51           0         2          0  0.00%  0.00%  0.00%   0 L2TRACE SERVER

52         332     15219         21  0.00%  0.00%  0.00%   0 Cluster L2

53        7952    121440         65  0.00%  0.00%  0.00%   0 Cluster RARP

54       15008    152109         98  0.00%  0.00%  0.00%   0 Cluster Base

56         728     10145         71  0.00%  0.00%  0.00%   0 DHCPD Timer

57           0         2          0  0.00%  0.00%  0.00%   0 Router Autoconf

58        2044       553       3696  0.00%  0.00%  0.00%   0 Syslog Traps

59           0         2          0  0.00%  0.00%  0.00%   0 VTPMIB EDIT BUFF

60      243536   4047528         60  0.07%  0.04%  0.02%   0 PM Callback

61         152       112       1357  0.00%  0.00%  0.00%   0 VTP Trap Process

62       14164    344831         41  0.00%  0.00%  0.00%   0 DHCPD Database

63       34708   1196738         29  0.00%  0.00%  0.00%   0 Calhoun EnvMon P

64           4         2       2000  0.00%  0.00%  0.00%   0 STP STACK TOPOLO

65           0         2          0  0.00%  0.00%  0.00%   0 STP FAST TRANSIT

66           0         2          0  0.00%  0.00%  0.00%   0 STP STACK TOPOLO

67           0         2          0  0.00%  0.00%  0.00%   0 CSRT RAPID TRANS

68        1828       258       7085  0.00%  0.16%  0.17%   1 Virtual Exec

70           0         3          0  0.00%  0.00%  0.00%   0 SNMP Timers

71    35893256    483793      74191  0.84%  0.63%  0.34%   0 IP SNMP

72      143380    242289        591  0.15%  0.11%  0.07%   0 PDU DISPATCHER

73      947612    242317       3910  0.68%  0.64%  0.38%   0 SNMP ENGINE

74           0         1          0  0.00%  0.00%  0.00%   0 SNMP ConfCopyPro

75        3968      2071       1915  0.00%  0.00%  0.00%   0 SNMP Traps

Before 1 month it is usually 3%. But now suddenly it is showing 99%. in the process also no of the process is above 1%. all the process are showing 0.xx%. How can i solve the issue.

there is another switch in the infra, which is conencted to this switch. That is a small-medium switch with 24 PoE port. so all the IP phones and around 10 PC s are connected to the small-medium switch.

ASA is conencted to the 2950switch. So all the machines are getting internet through the 2950 switch only.

So what may the issue of this high CPU utilization.

Please advice.

Thanks

Vipin

I have this problem too.
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smogra Sat, 12/10/2011 - 07:53

the cpu is not high because of any processes. it is the interrupt percentage that is high (95%).

you need to analyse the traffic that is flowing in and why it is hitting cpu.

1. check the logs for any suspicious error messages.

2. check if the spanning-tree is stable.

-Sweta

vipinrajrc Mon, 12/12/2011 - 04:12

Hi Sweta,

please see the below output of "sh logg". I think it is due to NTP synchronization mismatch.

Is this is the cause of the high CPU utilization on some time.?

2w1d:  xmt D2901053.E25BBA81 (00:32:03.884 IST Mon Dec 12 2011)

2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)

2w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed s

tate to down

2w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed s

tate to up

2w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed s

tate to down

2w1d: %LINK-3-UPDOWN: Interface FastEthernet0/7, changed state to down

2w1d: %LINK-3-UPDOWN: Interface FastEthernet0/7, changed state to up

2w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed s

tate to up

2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)

2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)

2w1d: NTP: xmit packet to 203.200.188.4:

2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64

2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)

2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  xmt D2903209.E22BEA2F (02:55:53.883 IST Mon Dec 12 2011)

2w1d: NTP: xmit packet to 210.212.45.242:

2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64

2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)

2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  xmt D2903213.E22AE1A0 (02:56:03.883 IST Mon Dec 12 2011)

2w1d: NTP: xmit packet to 203.200.188.4:

2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64

2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)

2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  xmt D2903249.E22C37D9 (02:56:57.883 IST Mon Dec 12 2011)

2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)

2w1d: NTP: xmit packet to 203.200.188.4:

2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64

2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)

2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  xmt D2903289.E229E00F (02:58:01.883 IST Mon Dec 12 2011)

2w1d: NTP: xmit packet to 203.200.188.4:

2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64

2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)

2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  xmt D29032C9.E22A5B5B (02:59:05.883 IST Mon Dec 12 2011)

2w1d: NTP: xmit packet to 203.200.188.4:

2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64

2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)

2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  xmt D2903309.E228BECB (03:00:09.883 IST Mon Dec 12 2011)

2w1d: NTP: xmit packet to 203.200.188.4:

2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64

2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)

2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)

2w1d:  xmt D2903349.E228D9CB (03:01:13.883 IST Mon Dec 12 2011)

2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)

2w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed

state to down

2w2d: %LINK-3-UPDOWN: Interface FastEthernet0/10, changed state to down

2w1d:  xmt D2901053.E25BBA81 (00:32:03.884 IST Mon Dec 12 2011)
2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)
2w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed s
tate to down
2w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed s
tate to up
2w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed s
tate to down
2w1d: %LINK-3-UPDOWN: Interface FastEthernet0/7, changed state to down
2w1d: %LINK-3-UPDOWN: Interface FastEthernet0/7, changed state to up
2w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed s
tate to up
2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)
2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)
2w1d: NTP: xmit packet to 203.200.188.4:
2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64
2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)
2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  xmt D2903209.E22BEA2F (02:55:53.883 IST Mon Dec 12 2011)
2w1d: NTP: xmit packet to 210.212.45.242:
2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64
2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)
2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  xmt D2903213.E22AE1A0 (02:56:03.883 IST Mon Dec 12 2011)
2w1d: NTP: xmit packet to 203.200.188.4:
2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64
2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)
2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  xmt D2903249.E22C37D9 (02:56:57.883 IST Mon Dec 12 2011)
2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)
2w1d: NTP: xmit packet to 203.200.188.4:
2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64
2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)
2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  xmt D2903289.E229E00F (02:58:01.883 IST Mon Dec 12 2011)
2w1d: NTP: xmit packet to 203.200.188.4:
2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64
2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)
2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  xmt D29032C9.E22A5B5B (02:59:05.883 IST Mon Dec 12 2011)
2w1d: NTP: xmit packet to 203.200.188.4:
2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64
2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)
2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  xmt D2903309.E228BECB (03:00:09.883 IST Mon Dec 12 2011)
2w1d: NTP: xmit packet to 203.200.188.4:
2w1d:  leap 3, mode 3, version 3, stratum 0, ppoll 64
2w1d:  rtdel 0000 (0.000), rtdsp 10001 (1000.015), refid 00000000 (0.0.0.0)
2w1d:  ref 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  org 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  rec 00000000.00000000 (19:00:00.000 IST Thu Dec 31 1899)
2w1d:  xmt D2903349.E228D9CB (03:01:13.883 IST Mon Dec 12 2011)
2w1d: %SYS-5-CONFIG_I: Configured from console by vty0 (10.254.254.25)
2w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed
state to down
2w2d: %LINK-3-UPDOWN: Interface FastEthernet0/10, changed state to down

here we have only two switches. so do i need to check spaning-tree???

Thanks

Vipin

zabeelmusa Tue, 12/13/2011 - 13:28

your switch seems to be processing a lot of traffic you would need to check which interfaces are highly utilized

Sh int | inc (up|txload) or replace the transmit with the receive.

Sent from Cisco Technical Support iPhone App

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