QinQ (Provider bridging) Introduction to QinQ Configuring QinQ QinQ Configuration example Enabling QinQ Setting up S-VLANs Configuring per-port S-VLAN membership Configuring port-types Disabling QinQ Changing VLAN port memberships (mixed VLAN mode) Moving ports between C-VLANs and S-VLANs (mixed VLAN mode) Viewing QinQ configuration and status Viewing a switch VLAN configuration Viewing the configuration for a particular VLAN Viewing the VLAN membership of one or more ports Viewing spanning tree status About QinQ