A string of octets containing one bit per VLAN. The
first octet corresponds to VLANs with VlanIndex values
1 through 8; the second octet to VLANs 9 through
16 etc. The most significant bit of each octet
corresponds to the lowest VlanIndex value in that octet.
The set of vlans configured by management to map for this
Instance. If the VlanId to Instance Mapping has to be known
then any one of the VlanMapped object should be used.If a
vlan is already mapped to this Instance, it may not be mapped
again. This object is used only for SET operation.
GET Operation returns null values.