QinQ mixed VLAN mode
The QinQ mixed VLAN mode configuration supports both C-VLAN and S-VLAN operations on the same device. This allows the use of S-VLAN member ports for QinQ tunneling, while regular ports can still do switching or routing within the C-VLAN space. To tunnel customer frames through the provider network, you can externally connect a regular port to a customer-network port, eliminating the need for a separate S-VLAN bridge device to perform such operations. When configuring VLANs on a mixed VLAN mode device, a separate
svlan
vid
command is used to distinguish the S-VLAN type from regular VLANs.
The main advantage for QinQ mixed VLAN mode is that users do not have to dedicate the entire switch as a QinQ access switch. For a high density chassis switch, customers can use regular ports for normal LAN switching, while S-VLAN member ports can be configured to access the QinQ provider network (see
Figure 50: QinQ configuration example). There are some additional restrictions in mixed-VLAN mode.