The VLAN mode type for this interface. This object can be set to: usedefault(1) open(2) closed(3) UseDefault Vlans: uses the bridge Vlan Mode value. The bridge Vlan Mode Value can be set to : Open, Closed or Mixed. Open VLANs: have no requirements about relationship between the bridge port that a frame was received upon and the bridge port(s) that it is transmitted on. All open VLANs within the bridge will share the same address table. Closed VLANs: require that the bridge port that a frame is received on is the same VLAN interface as the bridge port(s) that a frame is transmitted on. Each closed VLAN within the bridge will have its own address table.