The value is used indicated whether vlan state change should be notified to layer 3 or not, provided the vlan is configured as routable interface. Also used for single routable ports, in that case the criteria for state is PortOperStatus. Vlan is considered as UP if atleast one member of the port based vlan has link up, or atleast one port member of the policy based has an entry in the MGID or atleast one static member of the policy based vlan has link up. Otherwise, vlan is considered as DOWN. If the value is 'true' then the interface state change will not be notified to layer 3. (i.e., it always stays up). If the value is 'false' then the vlan state change will be notified to layer 3 so that IP related status reflects routable interface state.