Dell PowerEdge M420 Reference Manual page 258

Fields
MAC ACL Name
Rules
Interfaces
258
ACL Commands
Description
The name of the MAC access list.
The number of user-configured rules defined for the MAC
ACL.
The implicit 'deny all' rule defined at the end of every MAC
ACL is not included.
Displays the list of interfaces (unit/slot/port) to which the
MAC ACL is attached in a given direction.