I have WS-C4507R with WS-X4515 Supervisor, and WS-C4507R with WS-X45-SUP6-E Supervisor. Same network topology, same traffic rates, same IOS version: Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-ENTSERVICESK9-M), Version 12.2(53)SG3, RELEASE SOFTWARE (fc1).

show proccess cpu history

WS-X4515 Supervisor

100                                          *
 90 * * * * * * * * * * * * * * * * * * *** **
 80 * * * * * * * * * * * * * * * * * * *** **
 70 * * * * * * * * * * * * * * * * * * *** **
 60 * * * * * * * * * * * * * * *** * * *****#
 50 * * * * * ***** * ***** * ***** * ******##
 40 #*#*#*#*#*#*#*#*#*#*#*#*#*#*###*#*#*######
 30 ##########################################
 20 ##########################################
 10 ##########################################

               CPU% per minute (last 60 minutes)
              * = maximum CPU%   # = average CPU%

WS-X45-SUP6-E Supervisor

100
 90
 80
 70
 60                                *
 50 * * *******  ****  ***       *** *     * * * *** * *   * *
 40 **********************************************************
 30 **********************************************************
 20 ##########################################################
 10 ##########################################################

               CPU% per minute (last 60 minutes)
              * = maximum CPU%   # = average CPU%

show platform cpu packet statistics all | i Esmp

WS-X4515 Supervisor

Queue                  Total           5 sec avg 1 min avg 5 min avg 1 hour avg
---------------------- --------------- --------- --------- --------- ----------

EsmpNoTxInfo         0                0            0          0             0
Esmp                  462652         204       182       156         65
Esmp                        0                0            0          0             0

WS-X45-SUP6-E Supervisor

EsmpNoTxInfo         0                0            0          0             0
Esmp                        0                0            0          0             0
Esmp                        0                0            0          0             0

In peak CPU rates i see:

WS-X4515 Supervisor

show platform health | i K2L2
K2L2 Address Table R   2.00  68.38     12      5  100  500    7   6    2  3:17

WS-X45-SUP6-E Supervisor

show platform health | i K5 L2
K5 L2 Hardware Addre   2.00  36.34     20     14  100  500    1   2    2  6036:44

What is the reason of high rate process K2/K5 ?

Why WS-X4515 Supervisior have high rate in ESMP Queue ? (Maybe this is a root cause of CPU utilization?)

This situation presents on other WS-X4515 Supervisor in network with same topology.