High CPU for Catalyst 4500 K2L2 Address Table R

[d-mercado]

My Catalayst 4507 is reaching up to 82% CPU utilization and I noticed that K2L2 Address Table R is causing the high CPU, kindly help me to resolve this issue.

C4507#sh processes cpu | in HiPri|LoPri|CPU utilization
CPU utilization for five seconds: 82%/1%; one minute: 86%; five minutes: 87%
  54   350533923 329104616       1065 13.27% 13.84% 13.86%   0 Cat4k Mgmt HiPri
  55  1771768520 274992685       6442 59.91% 64.55% 66.04%   0 Cat4k Mgmt LoPri

C4507#sh platform health | in K2L2|%CPu
K2L2 Address Table R   2.00  66.35     12      5  100  500   91  82   58  27272:55
K2L2 New Static Addr   2.00   0.00     10      0  100  500    0   0    0  0:00
K2L2 New Multicast A   2.00   0.00     10      5  100  500    0   0    0  0:18
K2L2 Dynamic Address   2.00   0.00     10      5  100  500    0   0    0  0:16
K2L2 Vlan Table Revi   2.00   0.00     12      8  100  500    0   0    0  1:22

[Mohamed Sobair]

Hi,

Please check the below link describes troublshooting steps for C4500 Highe CPU,

http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00804cef15.shtml

Regards,

Mohamed

[Heather Basquill]

In most cases this is an indication that you have mac moves or a lot of learning going on.  Check STP and enable "mac address-table notification mac-move" if you find that K2L2 Address Table R is running very hot in the "show platform health | ex 0.0" output.

(just putting this in so I can find it when I forget about this in a year.)
 

[anderson.roberto.it]

I had a VM server with 3 interfaces ( 6/15, 6/21, 6/23 ) in the Interface port-channel 60.

When a wrong configuration was put the interface 6/21 out of port-channel, the 4507 started to move mac and CPU went to 98% ( process K2L2 68% ).

When I put the interface 6/21 in the port-channel ( channel-group 60 mode on ) everything go back.

Now the CPU is 33%.

[KAROLY KOHEGYI]

Hi,

We have same problem.

Did you solved this issue?

Regards,