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Configuring Scoping with the scope-policy Statement

To configure multicast scoping with the scope-policy statement, specify a policy name for the scope. The referenced policy must be correctly configured and contain the set of router interfaces on which you are configuring scoping, and the scope's address range configured as a series of router filters.

Only the interface, route-filter, and prefix-list match conditions are supported for multicast scoping policies. All other configured match conditions are ignored. The only actions supported are accept, reject, and the policy flow actions next-term and next-policy. The reject action means that joins and multicast forwarding are suppressed in both directions on the configured interfaces. The accept action allows joins and multicast forwarding in both directions on the interface. By default, scoping policies apply to all interfaces. The default action is accept.

For more information about configuring route filters and policies, see the JUNOS Policy Framework Configuration Guide.

In contrast to scoping with the scope statement, scoping with scope-policy does not automatically add the local scope at scope boundaries. You must explicitly configure the local scope boundaries when you use the scope-policy statement. The local scope limits the use of the multicast group 239.255.0.0/16 to an attached LAN.

For information about supported standards for multicast scoping, see IP Multicast Standards.

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