mac address for cat 6k

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801c9b4e.shtml#topic1

BIA (Burn-in-address) is used for all the interfaces of cat 6k.
User cannot have different mac address for each L3 interface.
Cat 6k allows user to change the mac address under an interface vlan x,
once it is changed, all the interfaces will pick up the new mac address.

Show module will also display the range of mac address assigned to the ports
of the module. The address is used for Layer 2 (BPDU bridge/spanning tree).
The interface must be configured as "switch port"