Describes the VLAN-based upstream/downstream rate statistics and bandwidth occupancy.
The indexes of this entry are hwVlanIndex and hwInnerVlanID.
hwInnerVlanID must be -1, that means the InnerVLAN-based upstream/downstream rate statistics
and bandwidth occupancy are not supported.
If hwVlanFlowAccountTable is being used to query the network-side packet statistics of a VLAN,
querying hwVlanTrafficOccupiedTable fails.