Operating rules for named source—port filters

A port or port trunk may only have one source-port filter, named or not named.

A named source-port filter can be applied to multiple ports or port trunks.

Once a named source-port filter is defined, subsequent changes only modify its action, they don’t replace it.

To change the named source-port filter used on a port or port trunk, the current filter must first be removed, using the no filter source-port named-filter <filter-name> command.

A named source-port filter can only be deleted when it is not applied to any ports.