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Hierarchy Level


Configure source-specific multicast (SSM) groups.

By default, the SSM group multicast address is limited to the IP address range from through However, you can extend SSM operations into another Class D range by including the ssm-groups statement in the configuration. The default SSM address range from through cannot be used in the ssm-groups statement. This statement is for adding other multicast addresses to the default SSM group addresses. This statement does not override the default SSM group address range.

IGMPv3 supports SSM groups. By utilizing inclusion lists, only sources that are specified send to the SSM group.


ip-addresses—List of one or more additional SSM group addresses separated by a space.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced before Junos OS Release 7.4.