An administratively assigned global VLAN identifier. For
VLAN interfaces, on different network devices, which are
part of the same globally identified VLAN, the value of this
object will be the same.
The binding between a global identifier and a VLAN
interface can be created or removed. To create a binding
an NMS must write a non-zero value to this object. To
delete a binding, the NMS must write a zero to this
object. The value 1 is reserved for the default VLAN and
this cannot be deleted or re-assigned.