This object indicates, per its own description, whether a fast re-route (FRR) protection tunnel needs to be created for this dynamic encap tunnel. Turning this on triggers an automatically established backup LSP so that a link or node failure along the primary path can be locally repaired within milliseconds by rerouting traffic on the spot, rather than waiting for the head-end router to resignal an entirely new end-to-end LSP. For example, turning this on ensures a sub-50-millisecond local repair path exists, so a single fiber cut causes only a brief blip rather than seconds of packet loss while the head-end recomputes a new path.