vlanMacBaseVlanMacMask 1.3.6.1.4.1.9.6.1.101.48.45.1.2

The Mask of the range. The mask determains the leading '1' bits of the mask (MSB). 48 means single HOST and 9 means the widest range. The MASK is limited to 9 to avoid entring ranges including multicast addresses.