The value of tmnxMDAHiBwMcastGroup specifies the group of high
bandwidth multicast traffic taps to which this tap belongs.
A value of '0' specifies that this tap is not a member of any High
Bandwidth Multicast group.
On an IOM of type 'iom-10g', the value of tmnxMDAHiBwMcastGroup
should be the same as the value of tmnxMDAHiBwMcastGroup set on the
other MDA residing on the IOM if the tmnxMDAHiBwMcastSource is set
to 'true'. Attempt to set to different values will result in an
'inconsistentValue' error.
tmnxMDAHiBwMcastGroup must be set in the same SNMP request PDU with
tmnxMDAHiBwMcastSource or an 'inconsistentValue' error will be
returned.