The value of vRtrMplsLspPathOperFRHopLimit indicates the total number
of hops to be used by detour LSP before merging to currently
operational LSP path.
When make-before-break functionality for the LSP is enabled and if the
LSP FR Hop Limit setting is changed, the resources allocated
to the existing LSP paths will not be released until a new path with
the new settings has been established. While a new path is being
signaled, the administrative value and the operational values of the
path may differ. The value of vRtrMplsLspFRHopLimit specifies the
FR Hop Limit setting for the new LSP path trying to be
established whereas the value of vRtrMplsLspPathOperFRHopLimit
specifies the FR Hop Limit setting for the existing LSP
path.