The value of tmnxFPHiBwMcastDefaultPathsOnly specifies whether only the
default paths are to be High Bandwidth Multicast (HBM) (typically paths
0 and 15) and the remaining paths are non-HBM 'true (1)', or all paths
are configured HBM on the forwarding path 'false (2)'.
This object is only meaningful if tmnxFPHiBwMcastSource is set to the
value 'true (1)'.