Which capability does the MPLS TE FRR facility backup protection method provide?

The MPLS TE FRR facility backup method enables local repair by establishing a bypass LSP at each point of local repair that can be used to reroute traffic for any of the multiple protected LSPs that traverse a failed link or node.

Assigning a backup TE LSP tunnel to the protected node at the headend is characteristic of an end-to-end backup solution, not the local repair mechanism of FRR.

While facility backup does leverage label stacking and typically uses a single backup TE LSP to protect multiple primary LSPs over a common failure point, option A describes the core capability of providing bypass paths at local repair points for the individual protected LSPs.

Defining the characteristics for a backup TE LSP is part of its configuration, not the inherent capability provided by the FRR facility backup protection method itself.