This object indicates LSP Preemption type of this LSP:
- unknown: the type is not known
- hardPreemption: the preempted LSP resources are
freed immediately; the LSP is broken immediately
and the traffic is disrupted.
- softPreemption: the resources release pending on the
reoptimization of this LSP. The head of the LSP
reroutes the traffic before the LSP is broken.
- frrSoftPreemption: similar to softPreemption. In this
case the traffic of the soft preempted LSP is switched to
the backup.
See: Farrel, A., Interim Report on MPLS Pre-emption,
draft-farrel-mpls-preemption-interim-00.txt, work in progress