Specifies the amount of bandwidth in megabytes per second
that is actually reserved by the backup tunnel for
facility backup. This value is repeated here from the MPLS-
TE MIB because the tunnel entry will reveal the bandwidth
reserved by the signaling protocol, which is typically 0
for backup tunnels so as to not over-book bandwidth.
However, internal reservations are typically made on the
PLR, thus this value should be revealed here.