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2948G-L3 high cpu

The CPU utilization of our catalyst 2948g-l3 is high recently.The max utilization had been more than 70%.But I cann't find any abnormal data.I tried command "show process cpu",and here is result

2948g#show processes cpu

CPU utilization for five seconds: 46%/29%; one minute: 52%; five minutes: 51%

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

1 84 7020 11 0.00% 0.00% 0.00% 0 Load Meter

2 24 67 358 0.08% 0.01% 0.00% 2 Virtual Exec

3 36248 4327 8377 0.00% 0.05% 0.05% 0 Check heaps

4 4 2 2000 0.00% 0.00% 0.00% 0 Pool Manager

5 0 2 0 0.00% 0.00% 0.00% 0 Timers

6 18520 25992 712 0.08% 0.04% 0.03% 0 ARP Input

7 0 2 0 0.00% 0.00% 0.00% 0 Serial Backgroun

8 0 2 0 0.00% 0.00% 0.00% 0 DDR Timers

9 0 1 0 0.00% 0.00% 0.00% 0 Entity MIB API

10 0 1 0 0.00% 0.00% 0.00% 0 OIR Handler

11 0 2 0 0.00% 0.00% 0.00% 0 EPIF reset proce

12 0 1 0 0.00% 0.00% 0.00% 0 IPC Zone Manager

13 192 35076 5 0.00% 0.00% 0.00% 0 IPC Periodic Tim

14 0 1 0 0.00% 0.00% 0.00% 0 IPC Seat Manager

15 1028 8139 126 0.00% 0.00% 0.00% 0 HC Counter Timer

16 0 1 0 0.00% 0.00% 0.00% 0 SERIAL A'detect

17 2120 32 66250 0.00% 0.00% 0.00% 0 EPAM Card Manage

18 64 197 324 0.00% 0.00% 0.00% 0 EPIF Enable If p

19 0 1 0 0.00% 0.00% 0.00% 0 Critical Bkgnd

20 11968 6995 1710 0.00% 0.00% 0.00% 0 Net Background

21 376 2146 175 0.00% 0.00% 0.00% 0 Logger

22 108 35155 3 0.00% 0.00% 0.00% 0 TTY Background

23 100 35075 2 0.00% 0.00% 0.00% 0 Per-Second Jobs

24 688 35482 19 0.00% 0.00% 0.00% 0 LINE Monitor Dea

25 0 1 0 0.00% 0.00% 0.00% 0 marker

26 41784 1172 35651 0.49% 0.10% 0.06% 0 THERMOSTAT monit

27 308 35138 8 0.00% 0.00% 0.00% 0 LSIPC Periodic T

28 12444 51860 239 0.00% 0.02% 0.01% 0 LSIPC RECV PROCE

29 3204 13502 237 0.00% 0.00% 0.00% 0 LSIPC BCAST PROC

30 4 20 200 0.00% 0.00% 0.00% 0 LSS ACL/QOS Proc

31 60 11694 5 0.00% 0.00% 0.00% 0 Envirnment Monit

32 168 3506 47 0.00% 0.00% 0.00% 0 Net Input

33 1272 7021 181 0.00% 0.00% 0.00% 0 Compute load avg

34 18776 585 32095 0.00% 0.02% 0.00% 0 Per-minute Jobs

35 0 1 0 0.00% 0.00% 0.00% 0 PPP IP Add Route

36 5484 15390 356 0.00% 0.00% 0.00% 0 CDP Protocol

37 9756240 29100352 335 14.15% 17.83% 17.93% 0 IP Input

38 0 3 0 0.00% 0.00% 0.00% 0 DOMINO PORT QOS

39 0 53 0 0.00% 0.00% 0.00% 0 LSS VLAN Reload

40 304648 810438 375 0.81% 0.70% 0.70% 0 LSS L2STAT RECV

41 58968 17508 3368 0.08% 0.07% 0.08% 0 LSS stat L3 proc

42 320164 98620 3246 0.32% 0.51% 0.50% 0 LSS stat L2 proc

43 4 2 2000 0.00% 0.00% 0.00% 0 LSS port-recover

44 1100 35066 31 0.00% 0.00% 0.00% 0 LSS ask stat ex_

45 1920 906 2119 0.00% 0.00% 0.00% 0 IP Background

46 4 122 32 0.00% 0.00% 0.00% 0 TCP Timer

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

47 8 20 400 0.00% 0.00% 0.00% 0 TCP Protocols

48 0 1 0 0.00% 0.00% 0.00% 0 Probe Input

49 0 1 0 0.00% 0.00% 0.00% 0 RARP Input

50 92 409 224 0.00% 0.00% 0.00% 0 BOOTP Server

51 20 585 34 0.00% 0.00% 0.00% 0 IP Cache Ager

52 720 615 1170 0.00% 0.00% 0.00% 0 Adj Manager

53 0 3 0 0.00% 0.00% 0.00% 0 LSS IPX Reload P

54 0 1 0 0.00% 0.00% 0.00% 0 LSS IPX BVI Proc

55 0 2 0 0.00% 0.00% 0.00% 0 LSS AT Reload Pr

56 0 1 0 0.00% 0.00% 0.00% 0 Time Range Proce

57 0 2 0 0.00% 0.00% 0.00% 0 LSS TB RECV PROC

58 3536 9227 383 0.00% 0.00% 0.00% 0 LSS MAC Process

59 0 2 0 0.00% 0.00% 0.00% 0 L2 Tcam

60 0 1 0 0.00% 0.00% 0.00% 0 SNMP ConfCopyPro

61 4112 108522 37 0.00% 0.00% 0.00% 0 LSS IPmcast Proc

62 16 4 4000 0.00% 0.00% 0.00% 0 LSS IPmcast Relo

63 396 35157 11 0.00% 0.00% 0.00% 0 TTY Background

64 172 35077 4 0.00% 0.00% 0.00% 0 Per-Second Jobs

65 250704 311304 805 0.24% 0.95% 0.60% 0 HyBridge Input P

66 924 39527 23 0.00% 0.00% 0.00% 0 Tbridge Monitor

67 14676 42842 342 0.00% 0.00% 0.00% 0 Spanning Tree

68 0 2 0 0.00% 0.00% 0.00% 0 DSS Process

69 0 1 0 0.00% 0.00% 0.00% 0 SNMP Timers

70 8448 4153 2034 0.00% 0.02% 0.00% 0 IP SNMP

71 0 1 0 0.00% 0.00% 0.00% 0 SNMP Traps

72 16968 46540 364 0.00% 0.01% 0.00% 0 CEF process

73 12 585 20 0.00% 0.00% 0.00% 0 CEF Scanner

from the result I cann't find any high cpu utilization process,but why the total utilization is high.How can i troubleshooting this?

1 REPLY

Re: 2948G-L3 high cpu

The starting point for this should be the following link: http://www.cisco.com/warp/public/63/highcpu.html. Most of your cpu is from IP input, so see that section in the above link. But remember, 40-50% cpu by itself isn't in on of itself necessarily bad, could be normal depending on your environment. A peak of 70% could be just that a peak (ie brief or temporary), and not to worry about. If it is a sustained 70%, that is different and should be looked at.

If this doesn't help, let use know.

Steve

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