The ability to filter
packets in a modular and scalable way is important for both network security
and network management. Access Control Lists (ACLs) provide the capability to
filter packets at a fine granularity. MAC ACLs are ACLs that filter traffic
using information in the layer 2 header of each packet.
Layer 2 MAC ACLs allow
the permission or denial of the packets based on the MAC source and destination
addresses. This module describes how to implement MAC ACLs.