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mofrr-asm-starg (Multicast-Only Fast Reroute in a PIM Domain)


Hierarchy Level


Enable mofrr-asm-starg to include any-source multicast (ASM) for (*,G) joins in the Multicast-only fast reroute (MoFRR).


mofrr-asm-starg applies to IP-PIM only. When enabled for group G, *,G will undergo MoFRR as long as there is no S#,G for Group G. In other words, *,G MoFRR will cease and any old states will be torn down when S#,G is created. Note too, that mofrr-asm-starg is not supported for mLDP (since mLDP itself does not support *,G).

In a PIM domain with MoFRR enabled, the default for stream-protection is S,G routes only.

Context: Multicast-only fast reroute (MoFRR) can be used to reduce traffic loss in a multicast distribution tree in the event of link down. To employ MoFRR, a downstream router is configured with an alternative path back towards the source, over which it receives a backup live stream of the same multicast traffic. That router propagates the same (S,G) join toward both upstream neighbors in order to create duplicate multicast trees. If a failure is detected on the primary tree, the router switches to the backup tree to prevent packet loss.

Required Privilege Level

routing—To view this statement in the configuration.

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

Release Information

Statement introduced in Junos OS Release 14.1.