The value of vRtrMplsLspOperFastReroute specifies whether the
operational LSP has fast reroute enabled or disabled.
When make-before-break functionality for the LSP is enabled and
if the fast reroute setting is changed, the resources for the
existing LSP will not be released until a new path with the new
attribute settings has been established. While a new path is
being signaled, the administrative value and the operational
values of fast reroute setting for the LSP may differ. The value
of vRtrMplsLspFastReroute specifies the setting used for the new
LSP path trying to be established whereas the value of
vRtrMplsLspOperFastReroute specifies the setting for the existing
LSP path.