User Manual UMN:CLIV58082678.1.8 Displaying VLAN InformationUser can display the VLAN information about Port based VLAN, Protocol based VLAN,MAC based VLAN, Subnet based VLAN and QinQ.Command Mode Descriptionshow vlan [VLANS]EnableGlobalBridgeShows all VLAN configurations.show vlan description Shows a description for specific VLAN.show vlan dot1q-tunnel Shows QinQ configuration.show vlan protocol Shows VLAN based on protocol.show vlan macbase Shows VLAN based on MAC address.show vlan subnet Shows VLAN based on subnet.show vlan port PORTS Shows VLAN based on the port.show port protected Shows port isolation configuration.8.1.9 QinQ VLAN MappingQinQ or Double Tagging is one way for tunneling between several networks.Fig. 8.3 Example of QinQ ConfigurationIf QinQ is configured on the V5808, it transmits packets adding another Tag to originalTag. Customer A group and customer B group can guarantee security becausetelecommunication is done between each VLANs at Double Tagging part.Double tagging is implemented with another VLAN tag in Ethernet frame header.
