Only facility bypass and link protection are supported for a P2MP policy. Node protection is not supported. The facility bypass can be created using shared replication segments. Shared replication segments do not have a tree ID. They are identified using a replication segment identifier within the tree ID.
At the Point of Local Repair (PLR), the primary replication segment has a protection next hop. This protection next-hop has a second OIF with its own outgoing label, which is used for the facility protection tunnel.
The facility protection tunnel can consist of multiple transit nodes until the tunnel reaches the Merge Point (MP). Replication segments are configured on these transit nodes to complete the facility protection tunnel. Multiple P2MP trees can share the facility protection tunnel at the PLR. The facility protection tunnel uses the implicit null label (see Implicit null case) or an actual label at the Penultimate Hop Popping (PHP) node (see Non-implicit null case).