Operation Manual – QinQH3C S7500 Series Ethernet Switches Chapter 1 QinQ Configuration1-2z You can have your private network VLAN IDs independent of public network VLANIDs.z Provides simpler Layer 2 VPN solutions for small-sized MANs or intranets.1.1.2 Implementation of QinQQinQ can be implemented by enabling the QinQ function on ports.With the QinQ function enabled, a received packet is tagged with the default VLAN tagof the receiving port no matter whether or not the packet already carries a VLAN tag. Ifthe packet already carries a VLAN tag, the packet becomes a double-tagged packet.Otherwise, the packet becomes a packet carrying the default VLAN tag of the port.1.2 QINQ Configuration1.2.1 Configuration PrerequisitesThe QinQ feature cannot be configured while the Voice VLAN feature is in effect.Before enabling QinQ on a port, make sure that Voice VLAN is disabled on the port.1.2.2 Configuring QinQFollow these steps to configure QinQ:To do… Use the command… RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Enable QinQ for the port vlan-vpn enableRequiredBy default, QinQ isdisabled on a port.Caution:The LS82GT20 and LS82GP20 LPUs do not support the QinQ feature.
