The value of vRtrMplsLspPathOperSetupPriority specifies the
setup priority used by the operational LSP path.
When make-before-break functionality for the LSP is enabled and
if the path setup priority is changed, the resources allocated
to the existing LSP paths will not be released until a new path
with the new setup priority settings has been established. While
a new path is being signaled, the administrative value and the
operational values of the path setup priority may differ. The
value of vRtrMplsLspPathSetupPriority specifies the setup
priority for the new LSP path trying to be established whereas
the value of vRtrMplsLspPathOperSetupPriority specifies the
setup priority for the existing LSP path.