Cisco Hidden command for fabric utilizations.

show plat hard cap fabric

The output of the above command gives bus utlization etc. It is a very nice command

Identifying the backplane utilization on Catalyst 6500.

You always wanted to know the peak backplane utilization of Catalyst 6500 series switch and when it occurred.  You can find those details by typing this command. 

cs1 #show catalyst6000 traffic-meter 

  traffic meter =   0%  Never cleared

           peak =  51%        reached at 17:07:23 Pacific Thu Dec 20 2007

You can also setup SNMP monitoring and Syslog to alert you if the utilization crosses pre-defined values.  You can find more details on this at,

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094a96.shtml

Hope this command is useful to you.  If yes, please leave feedback.

Thank you.

Murthy