RSVP-TE supports preempting secondary LSPs that are signaled but not active

You can configure the hold priority of the secondary standby label-switched path (LSP) for RSVP-Traffic Engineering (RSVP-TE). The hold priority will be used to determine if the standby non-active LSP can be preempted. This will help to bring up nonstandby secondary path LSPs with higher setup priority which are not able to come-up because of bandwidth crunch. To configure the non-active hold priority value for a secondary standby path, use the non-active-hold-priority statement at the [edit protocols mpls label-switched-path <lsp-name>] hierarchy level. You can set the priority from 0 through 7, where 0 is the highest priority and 7 is the lowest.