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Cisco 2801 Router having high CPU 99%

Hi,

We have one Router Cisco 2801 at the customer site and facing issue of having very High CPU coming to 99%.

CPU utilization for five seconds: 99%/28%; one minute: 99%; five minutes: 98%

                             usecs  5secs 1Min  5Min  TTY

18 1432704 473001 3028 0.97% 0.91% 0.74% 0 ARP Input

95 32380564 2407649 13449 29.35% 47.13% 48.43% 0 IP Input

122 31504 9103       3460 38.58% 3.33% 1.81% 195 Virtual Exec

Also find below CPU process history,

999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999

100 ############################################################

90 ############################################################

80 ############################################################

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

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

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

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

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

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

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

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

0 5 0 5 0 5 0 5 0 5 0

CPU% per minute (last 60 minutes)

* = maximum CPU% # = average CPU%

999999333323433934799899999985433334143233363335665322342323333333236

999999110391298940835799999918203528636689505061333174220080043128963

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%

Also attaching here show tech for this Router to check out brief this issue and suggest me further.

Regards,

Ashutosh

2 REPLIES
Hall of Fame Super Silver

Re: Cisco 2801 Router having high CPU 99%

Hello Ashutosh,

if you like you can post the following command:

show proc cpu sorted 1min

it provides the processes that most use cpu first ( sorted)

we see that cpu usage by interrupts is far lower then total cpu usage

CPU utilization for five seconds: 99%/28%<<< interrupts ; one minute: 99%; five minutes: 98%

the process most using the cpu is likely IP input


95 32380564 2407649 13449 29.35% 47.13% 48.43% 0 IP Input


and the following process:

122       31504      9103       3460 38.58%  3.33%  1.81% 195 Virtual Exec   

see the following document for high cpu caused by IP input

http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af3.shtml

for virtual exec

http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2ae4.shtml

and more general document

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00800a70f2.shtml

Hope to help

Giuseppe

Hall of Fame Super Gold

Cisco 2801 Router having high CPU 99%

ip route 0.0.0.0 0.0.0.0 Serial0/1/1

Avoid assigning an interface.  It's better if you assign an IP address.  In your case, it should be "ip route 0.0.0.0 0.0.0.0 190.190.2.1".

Have you tried upgrading your IOS before?

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