The value of sdpBndIgmpSnpgCfgMcacPrRsvMndBW specifies the bandwidth
pre-reserved for all the mandatory channels on a given interface
in kilo-bits per second(kbps).
If the value of sdpBndIgmpSnpgCfgMcacUnconstBW is '0', no mandatory
channels are allowed. If the value of sdpBndIgmpSnpgCfgMcacUnconstBW
is '-1', then all mandatory and optional channels are allowed.
If the value of sdpBndIgmpSnpgCfgMcacPrRsvMndBW is equal to the
value of sdpBndIgmpSnpgCfgMcacUnconstBW, then all the unconstrained
bandwidth on a given interface is allocated to mandatory channels
configured through multicast CAC policy on that interface and no
optional groups (channels) are allowed.
The value of sdpBndIgmpSnpgCfgMcacPrRsvMndBW should always be less
than or equal to that of sdpBndIgmpSnpgCfgMcacUnconstBW. An attempt
to set the value of sdpBndIgmpSnpgCfgMcacPrRsvMndBW greater than
that of sdpBndIgmpSnpgCfgMcacUnconstBW will result in inconsistent
value error.