Creating a Named Scope for Multicast Scoping

To configure multicast scoping by defining a named scope, include the scope statement and specify a name for the scope, the set of routing device interfaces on which you are configuring scoping, and the scope's address range:

For a list of the hierarchy levels at which you can include this statement, see the statement summary section for this statement.

Note: The prefix specified with the prefix statement must be unique for each scope statement. If multiple scopes contain the same prefix, only the last scope applies to the interfaces. If you need to scope the same prefix on multiple interfaces, list all of them in the interface statement for a single scope statement.

When you configure multicast scoping with a named scope, all scope boundaries must include the local scope. If this scope is not configured, it is added automatically at all scoped interfaces. The local scope limits the use of the multicast group 239.255.0.0/16 to an attached LAN.

When you configure scoping with a named scope, the show multicast scope operational mode command displays the names of the defined scopes, prefixes, and interfaces. When you configure scoping with a scope policy, the command displays only the name of the scope policy. For information about scope policies and the scope-policy statement, see Using a Scope Policy for Multicast Scoping.