General guidelines and restrictions
When you configure MAC authentication, follow these guidelines and restrictions:
MAC authentication is exclusive with link aggregation group or service loopback group.
You cannot enable MAC authentication on a port already in a link aggregation group or a service loopback group.
You cannot add a MAC authentication-enabled port to a link aggregation group or a service loopback group.
Do not configure MAC authentication and EVB on the same port. For information about EVB, see EVB Configuration Guide.