High CPU utilization on Cisco 1760

Hello, sometimes our Cisco 1760 has high CPU utilization and it lasts for 5-20 seconds

Here's how it looks

rtr-off-02>sh proc cpu hi

rtr-off-02 09:56:12 AM Monday Sep 19 2005 msk

55555 3333333333 77777 111 11111111112222244444111113333311111222227777700000 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) 959773747 956395999887669999999896939997999999788 99999989 7975543884919979999267449959896496992993909999077499999999 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% 1 1 1 1 9999 9999999199999999 0999974 999999909999999999998534189999090999

9998656559999999099999989909979618999999909999999999953532629999090999

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%

rtr-off-02>sh proc cpu so CPU utilization for five seconds: 95%/30%; one minute: 31%; five minutes: 21% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 34 101467021 50369011 2014 64.14% 20.42% 12.98% 0 IP Input

63 470816 7203932 65 0.39% 0.08% 0.01% 0 Inspect Timer 21 360820 1784502 202 0.31% 0.05% 0.01% 0 Logger 101 1253374 1155392 1084 0.15% 0.03% 0.04% 0 SNMP ENGINE 93 492036 558149200 0 0.15% 0.05% 0.01% 0 SAA Event Proces 59 3625 38096 95 0.07% 0.00% 0.00% 0 Adj Manager 4 629 129 4875 0.07% 0.05% 0.07% 6 Virtual Exec 83 565231 6072498 93 0.07% 0.04% 0.04% 0 Crypto ACL 8 0 2 0 0.00% 0.00% 0.00% 0 Timers 7 0 1 0 0.00% 0.00% 0.00% 0 AAA_SERVER_DEADT

What's wrong with my Cisco?

Here's some more info about Cisco router rtr-off-02>sh ver Cisco Internetwork Operating System Software IOS (tm) C1700 Software (C1700-K9O3SY7-M), Version 12.3(9), RELEASE SOFTWARE (fc2) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Fri 14-May-04 15:39 by dchih Image text-base: 0x80008120, data-base: 0x81021588

ROM: System Bootstrap, Version 12.2(4r)XL, RELEASE SOFTWARE (fc1)

rtr-off-02 uptime is 3 weeks, 5 days, 10 hours, 59 minutes System returned to ROM by power-on System restarted at 22:55:47 msk Tue Aug 23 2005 System image file is "flash:c1700-k9o3sy7-mz.123-9.bin"

This product contains cryptographic features and is subject to United States and local country laws governing import, export, transfer and use. Delivery of Cisco cryptographic products does not imply third-party authority to import, export, distribute or use encryption. Importers, exporters, distributors and users are responsible for compliance with U.S. and local country laws. By using this product you agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to snipped-for-privacy@cisco.com.

cisco 1760 (MPC860P) processor (revision 0x200) with 83313K/14991K bytes of memory. Processor board ID FOC06370PTT (655533886), with hardware revision BB67 MPC860P processor: part number 5, mask 2 Bridging software. X.25 software, Version 3.0.0.

1 Ethernet/IEEE 802.3 interface(s) 1 FastEthernet/IEEE 802.3 interface(s) 1 Serial(sync/async) network interface(s) 1 Virtual Private Network (VPN) Module(s) 32K bytes of non-volatile configuration memory. 16384K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102