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Community Member

High CPU load -Cat 4510 / Cat4k Mgmt LoPri

Hi,

We have really high CPU load on one of our Catalyst 4500.

It is usually between 40 % - 60 % but goes up to 90 - 95 % AT TIMES.

We run multi-area OSPF with 5 4500 in the core. The one that is concerning us is ASBR and a Backbone router.

We use several thousands of global IP addresses in our network that all exit our network through the problem

switch.

Does anyone have any ideas about the following outputs?

Can it be OSPF updates or something that

I snagged these outputs whilst the switch was working extremely hard...

(some data omitted)

_____________________________________________

#show processes cpu

CPU utilization for five seconds: 91%/19%; one minute: 92%; five minutes: 91%

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

29 174355212 540332576 322 2.55% 2.90% 2.90% 0 Cat4k Mgmt HiPri

30 32944829001977031423 1666 61.19% 62.71% 61.81% 0 Cat4k Mgmt LoPri

__________________________________________________

show platform health

%CPU %CPU RunTimeMax Priority Average %CPU Total

Target Actual Target Actual Fg Bg 5Sec Min Hour CPU

Lj-poll 1.00 0.02 2 735 100 500 0 0 0 35:01

GalChassisVp-review 3.00 0.21 10 14 100 500 0 0 0 239:34

TagMan-RecreateMtegR 1.00 0.00 10 0 100 500 0 0 0 0:00

K2CpuMan Review 30.00 69.44 30 47 100 500 119 114 51 61240:34

K2AccelPacketMan: Tx 10.00 37.70 20 1 100 500 55 53 26 31795:16

---------------------------------------------------

Show proc cpu hist:

9898878888888987789888787777787877777779999999988778877888888776777677

5755272305394207264485830644819186869981044666673683499311320878412717

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%

_____________________________________________________________________________________

Any ideas or suggestions would be greatly appreciated.

1 REPLY
Community Member

Re: High CPU load -Cat 4510 / Cat4k Mgmt LoPri

Need more info - I suggest opening a TAC case.

http://www.cisco.com/en/US/customer/products/hw/switches/ps663/products_tech_note09186a008014741c.shtml

Use a syslog server to capture the output.

Use the recurring command feature in TeraTerm Emulator

I.E.

#term len 0

#term mon

Log the output to a text file

& every minute run the recurring command:

show proc cpu sorted \n (CatOS)

- or -

show proc cpu sorted | exclude 0.00% \n

N.B. the '\n' is a TeraTerm emulator program variable only!

http://www.ayera.com/teraterm/

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