You use multicast scoping to limit multicast traffic by configuring it to an administratively defined topological region. Multicast scoping controls the propagation of multicast messages—both multicast group joins upstream toward a source and data forwarding downstream. Scoping can relieve stress on scarce resources, such as bandwidth, and improve privacy or scaling properties.
For multicast scoping configuration examples, see Example: Configuring Scoping with the scope Statement and Example: Configuring Scoping with the scope-policy Statement.
This section discusses the following topics that provide information about configuring multicast scoping: