The value of tmnxMobGwSysGroupRed specifies the redundancy type. If the
value of the object is set to 'none', then the cards in this group are
unprotected. If the value of the object is set to 'oneToOne', each
card has one redundant backup card.
The value of this object must be set when the row is created and
cannot be changed while the row status is 'active'.