Hi,
on the catalyst 6500 you have two different acl merge algrithm. ODM (Order Dependent Merge) or OIM (Order Independent Merge). On Supervisor IOS systems, or on the MSFC in a hybrid system, issue the show fm summary command to see which
interfaces are enforcing ACLs in hardware (ACTIVE) and which are enforcing ACLs in software (INACTIVE).
A good url for this topic is:
http://www.cisco.com/en/US/products/hw/switches/ps708/products_white_paper09186a00800c9470.shtml
Regards
Peter