7206 cpu process history

Unanswered Question
Mar 22nd, 2007

Can someone tell me why I am seeing the 72 hour cpu history allways at 100% and the 60min and 1min are normal. the number of packets per secound are around 15KPPS.

This is a 7206 router with a NPE-300.

The NPE-300 specification say that it can handle up to 400KPPs.

Can I put more port adapters or is the router stress out?

Is there any documentation on how to calculate how many packetes per Sec the NPE is forwarding?

JAX-7206b#sho proc cpu hist

3333333333333333333333333333333333333333333333333333333333

9999922222111112222233333111113333322222000002222277777444

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)

3222122139332961233333121212222233332233333633222333333332

7240800922431499112352919491002157449156884535111252234530

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

9999989999989999999999999999998998999989999999999998979998899999999909

8799939296279819939899995945340365897030798999989894950199693697898909

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%

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sundar.palaniappan Thu, 03/22/2007 - 10:56

Richard,

That's an actual reflection of how busy the CPU was over the last 72 hours. All it tells you is the utilization is much lower over the last 60 mins than the 72 hours preceding that. Honestly, the utilization levels look alarmingly high. You may want to investigate whether this has been triggered by any malicious traffic or bad hardware. Instead, if it's the normal baseline for this device then you may want to look at upgrading this device.

NPE-300 can handle 300kpps when fast switching and can handle only 18-20kpps when it's process switching. That's consistent with your findings of 15kpps being handled by the NPE and it looks like most of the packets are being process switched.

In an normal environment, you shouldn't be seeing too many packets being process switched as fast/CEF, depending on what's enabled, should handle most of the traffic. Focus on the traffic to see if there's any malicious traffic, like virus/worms, that's causing this behavior.

HTH

Sundar

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