Indicates the VLAN attribute. The following enumerated values are supported:
Options:
1. common(1) -indicates common VLAN.
2. qinq(2) -indicates QinQ VLAN.
3. stacking(3) -indicates stacking VLAN.
4. subVlan(4) -indicates sub VLAN.
During the creation of a VLAN, if this leaf is not specified, common(1)
is adopted by default. You can perform the set operation on this
leaf to modify the VLAN attribute.
The value of hwVlanAttrib must not be subvlan(4).
The value can be subvlan(4) only in the read operation. Adding a VLAN to
or deleting a VLAN from a super VLAN must be performed through hwVlanAggregationTable.