The value of vRtrMplsP2mpInstOperBandwidth indicates the amount of
bandwidth in mega-bits per seconds (Mbps) that has been reserved
for the operational P2MP LSP path.
When make-before-break functionality for the P2MP LSP is enabled and
if the path bandwidth is changed, the resources allocated to the
existing P2MP LSP paths will not be released until a new path with
the new bandwidth settings has been established. While a new path
is being signaled, the administrative value and the operational
values of the path bandwidth may differ. The value of
vRtrMplsP2mpInstBandwidth specifies the bandwidth requirements for
the new P2MP LSP path trying to be established whereas the value of
vRtrMplsP2mpInstOperBandwidth specifies the bandwidth reserved
for the existing P2MP LSP path.