| 摘要 |
In one embodiment, a primary tail-end node (PTE) of a point-to-multipoint (P2MP) tunnel selects a backup tail-end node (BTE) from one or more BTEs that are configured to forward traffic to a same multicast network as the PTE. The PTE then determines a branching node of the P2MP tunnel to reach the PTE and the selected BTE, and notifies the branching node of the selected BTE. In response, the branching node establishes a backup tunnel to the selected BTE, and redirects P2MP traffic onto the backup tunnel to the selected BTE in response to a detected failure of the PTE.
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