This object selects the CSMA/CD frame format (ie Ethernet or
IEEE 802.3 w/snap) to which the bridge translates all
Token Ring packets with a snap header whose Ethernet type
resides in the ctBridgeTransTrEnetSnapTable and is enabled.
This selection is overidden by the learned format when
ctBridgeTransTrEnetAutoMode is enable and the format has
been learned.