1-6z Basic QinQ should be configured on the ports connecting customer networks.z It is recommended that you do not configure QinQ on an RRPP-enabled port, because RRPPpackets may be transmitted to the wrong VLANs, causing RRPP to become invalid. If you reallyneed to configure QinQ on an RRPP-enabled port, you can configure VLAN mapping on the portand configure the RRPP control VLANs as the CVLANs and SVLANs at the same time. In this way,the RRPP packets can skip QinQ operations and continue to be transmitted in the control VLANs.For detailed information about RRPP control VLANs, refer to the RRPP Configuration in the HighAvailability Volume.z Do not configure QinQ on a reflector port. For information about reflector ports, refer to MirroringConfiguration in the Access Volume.Configuring VLAN Transparent TransmissionWhen basic QinQ is enabled on a port, all packets passing through the port will be tagged with the port’sdefault VLAN tag. However, by configuring the VLAN transparent transmission function on a port, youcan specify the port not to add its default VLAN tag to packets carrying specific inner VLAN tag(s) whenthey pass through it, so that these packets are transmitted in the service provider network with singletags.Follow these steps to configure VLAN transparent transmission:To do... Use the command... RemarksEnter system view system-view —EnterEthernet orLayer-2aggregateinterfaceviewinterface interface-type interface-numberEnterinterfaceview or portgroup viewEnter portgroup view port-group manual port-group-nameRequiredUse either command.Enable QinQ on the port(s) qinq enable RequiredDisabled by defaultConfigure VLAN transparenttransmission on the port(s) qinq transparent-vlan vlan-listRequiredBy default, VLANtransparenttransmission is notconfigured.
