VLAN allOpen or allClosed Mode 171Mode Requirements Table 16 shows the requirements for defining static VLANs in allOpen andallClosed mode.Table 16 Mode Requirements for Static VLANsType of StaticVLAN RequirementsPort-based For nonoverlapped port-based VLANs:n Protocol type: unspecifiedn Separate member ports. That is, each port-based VLANowns a different set of ports.For overlapped port-based VLANs:n Protocol type: unspecifiedn IEEE 802.1Q tagging for shared ports. That is, the sharedports can employ a tagging mode of none in only oneVLAN; shared ports in all other VLANs must use IEEE802.1Q tagging.Protocol-based For nonoverlapped protocol-based VLANs:n Either the protocol type or the member ports are uniqueper VLANFor overlapped protocol-based VLANs (multiple VLANs of thesame protocol type that share ports):n IEEE 802.1Q tagging for shared ports. That is, the sharedports can employ a tagging mode of none in only one ofthe same protocol type VLANs; shared ports in all otherVLANs of the same protocol type must use IEEE 802.1Qtagging.Network-based(IP VLAN only)n A Layer 3 address that is unique per network-based VLANn For allOpen mode, no tagging restrictions on the sharedportsn For allClosed mode, IEEE 802.1Q tagging for sharedports. That is, the shared ports can employ a taggingmode of none in only one of the network-based VLANs;shared ports in all other network-based VLANs must useIEEE 802.1Q tagging.
