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New Member

Router CPU Interrupt Utilization High

I have a router interrupt utilization quite high. How to determine what the cause of this high interrupt utilization. The cef and the netflow switching has been enabled already.

show proc cpu

CPU utilization for five seconds: 78%/76%; one minute: 60%; five

minutes: 59%

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

1 0 1 0 0.00% 0.00% 0.00% 0 Chunk

Manager

2 2040 13862 147 0.00% 0.00% 0.00% 0 Load

Meter

3 92 47 1957 0.24% 0.03% 0.00% 66 Virtual

Exec

4 56772 8618 6587 0.00% 0.06% 0.05% 0 Check

heaps

5 188 36 5222 0.00% 0.00% 0.00% 0 Pool

Manager

6 0 1 0 0.00% 0.00% 0.00% 0

AAA_SERVER_DEADT

7 4 2 2000 0.00% 0.00% 0.00% 0 Timers

8 0 2 0 0.00% 0.00% 0.00% 0 Serial

Backgroun

9 0 2 0 0.00% 0.00% 0.00% 0 AAA

high-capacit

10 144 2312 62 0.00% 0.00% 0.00% 0

Environmental mo

11 22624 3874 5839 0.00% 0.05% 0.01% 0 ARP Input

12 2508 16924 148 0.00% 0.00% 0.00% 0 HC

Counter Timer

13 0 3 0 0.00% 0.00% 0.00% 0 DDR

Timers

14 4 2 2000 0.00% 0.00% 0.00% 0 Entity

MIB API

15 0 1 0 0.00% 0.00% 0.00% 0 SERIAL

A'detect

16 7048 69138 101 0.00% 0.00% 0.00% 0 GraphIt

17 0 2 0 0.00% 0.00% 0.00% 0 Dialer

event

18 0 1 0 0.00% 0.00% 0.00% 0 Critical

Bkgnd

19 5396 15352 351 0.00% 0.00% 0.00% 0 Net

Background

20 12 25 480 0.00% 0.00% 0.00% 0 Logger

21 11508 69134 166 0.00% 0.00% 0.00% 0 TTY

Background

22 141660 69162 2048 0.49% 0.33% 0.31% 0

Per-Second Jobs

23 0 2 0 0.00% 0.00% 0.00% 0 SM

Monitor

24 3432 12118 283 0.00% 0.00% 0.00% 0 Net Input

25 3520 13862 253 0.00% 0.00% 0.00% 0 Compute

load avg

26 42492 1170 36317 0.00% 0.03% 0.00% 0

Per-minute Jobs

27 0 2 0 0.00% 0.00% 0.00% 0 AAA

Server

28 0 1 0 0.00% 0.00% 0.00% 0 AAA ACCT

Proc

29 0 1 0 0.00% 0.00% 0.00% 0 ACCT

Periodic Pr

30 0 2 0 0.00% 0.00% 0.00% 0 AAA

Dictionary R

31 565464 361496 1564 1.06% 0.81% 0.66% 0 IP Input

32 0 1 0 0.00% 0.00% 0.00% 0 ICMP

event handl

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

33 4 1 4000 0.00% 0.00% 0.00% 0 IP Flow

Backgrou

34 0 3 0 0.00% 0.00% 0.00% 0 PPP Hooks

35 0 1 0 0.00% 0.00% 0.00% 0 X.25

Encaps Mana

36 204 845 241 0.00% 0.00% 0.00% 0 TCP Timer

37 12 7 1714 0.00% 0.00% 0.00% 0 TCP

Protocols

38 0 1 0 0.00% 0.00% 0.00% 0 Socket

Timers

39 16 233 68 0.00% 0.00% 0.00% 0 HTTP CORE

40 0 2 0 0.00% 0.00% 0.00% 0 PPP IP

Route

41 0 2 0 0.00% 0.00% 0.00% 0 PPP IPCP

42 7760 1229 6314 0.00% 0.01% 0.00% 0 IP

Background

43 172 1161 148 0.00% 0.00% 0.00% 0 IP RIB

Update

44 1660 1157 1434 0.00% 0.00% 0.00% 0 Adj

Manager

45 0 1 0 0.00% 0.00% 0.00% 0 Asy FS

Helper

46 0 1 0 0.00% 0.00% 0.00% 0 RARP

Input

47 0 2 0 0.00% 0.00% 0.00% 0 DHCPD

Receive

48 76 1155 65 0.00% 0.00% 0.00% 0 IP Cache

Ager

49 0 1 0 0.00% 0.00% 0.00% 0 COPS

50 0 2 0 0.00% 0.00% 0.00% 0 PPP Bind

51 0 1 0 0.00% 0.00% 0.00% 0 PAD

InCall

52 0 2 0 0.00% 0.00% 0.00% 0 X.25

Background

53 0 2 0 0.00% 0.00% 0.00% 0 LOCAL AAA

54 0 2 0 0.00% 0.00% 0.00% 0 ENABLE

AAA

55 0 2 0 0.00% 0.00% 0.00% 0 LINE AAA

56 0 2 0 0.00% 0.00% 0.00% 0 TPLUS

58 136 2775 49 0.00% 0.00% 0.00% 0

CRM_CALL_UPDATE_

59 0 2 0 0.00% 0.00% 0.00% 0 AAA SEND

STOP EV

60 0 1 0 0.00% 0.00% 0.00% 0 Syslog

Traps

61 68 1156 58 0.00% 0.00% 0.00% 0 SAA Event

Proces

62 102936 104671 983 0.00% 0.09% 0.11% 0 CEF

process

63 248 2406 103 0.00% 0.00% 0.00% 0 CEF

Scanner

64 0 1 0 0.00% 0.00% 0.00% 0 SNMP

Timers

65 0 2 0 0.00% 0.00% 0.00% 0 IP SNMP

66 0 1 0 0.00% 0.00% 0.00% 0 PDU

DISPATCHER

67 64 2 32000 0.00% 0.00% 0.00% 0 SNMP

ENGINE

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

68 0 1 0 0.00% 0.00% 0.00% 0 SNMP

ConfCopyPro

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

Traps

70 5720 69710 82 0.00% 0.00% 0.00% 0 NTP

71 120 578 207 0.00% 0.00% 0.00% 0 DHCPD

Timer

72 736 19620 37 0.00% 0.00% 0.00% 0 DHCPD

Database

Please advised.

3 REPLIES
VIP Purple

Re: Router CPU Interrupt Utilization High

Hello,

this could be caused by a variety of things, e.g. a software bug - which IOS version are you running ?

For the various causes of this problem, check the following document:

http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af0.shtml

Regards,

Georg

New Member

Re: Router CPU Interrupt Utilization High

The IOS version is as below:

c2600-i-mz.123-1a.bin. The website i have go through already but can't get anything from it.

Gold

Re: Router CPU Interrupt Utilization High

Could you check show alignment?

Russ.W

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