ā09-27-2011 01:19 AM - edited ā03-04-2019 01:44 PM
Hi,
Im having a cisco 7206 VXR router which is having high CPU utilization due to interrupt. The attached is the logs of the device.
Can Anyone let me know the cause of this issue.
ā09-27-2011 02:16 AM
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Normally, interrupt CPU represents the router forwarding packets through its fast path.
What's the aggregate bandwidth that's being processed when the interrupt CPU is high?
If the interrupt CPU just occasional spikes or sustained? (I.e. what's the CPU history stats?)
ā09-27-2011 03:05 AM
Hi,
Current aggregate b.w is 500 mpbs.. and the attached is the logs of cpu histroy
CS-7206VXR# show cpu hist
888888888888888888888888877777888888888888888888888888888888
111110000033333000001111199999222221111155555000001111100000
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 second (last 60 seconds)
888888888888778877888888888888877888888888788888888888787778
530431350433870088122221243230389840143311913010254236919663
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%
888887533232243333579899888887523223343222222222322222222222222222222233
829689720638641398740602919976270624412887946774176788954346124841648635
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%
ā09-27-2011 06:22 AM
Hi Jithin,
Looking at the o/ps, I see the CPU spike started a day ago. The o/ps attached shows the total traffic through the router was 50Mbps when the o/p was taken and the CPU was 77%.
Can you confirm what is the current throughput on the router? Were there any changes made recently in last few days that could have caused the issue?
Is it possible to post a running config (with IPs removed if needed). Was there any new configurations made recently?
Thanks.
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