H3C Technologies H3C S12500 Series Switches - Manual (Page 206)

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Traditional solution
As shown in Figure 70 , configure the QinQ feature on the distribution layer devices and configure QinQ
termination on core layer devices. In a configuration example, the traditional networking solution is used
unless the lite solution is marked for the configuration example.
Figure 70 Traditional QinQ termination networking solution
Lite solution
As shown in Figure 71 , configure both the QinQ feature and QinQ termination on core layer devices,
and you do not need to configure the distribution layer devices. When you use the lite solution and create
a VLAN interface on the core layer devices for QinQ termination, make sure the inner VLAN IDs (CVLAN
IDs) to be terminated do not include the VLAN interface number.
Figure 71 Lite QinQ termination networking solution
VLAN 11 VLAN 12 VLAN 13
Server group
L2 Switch B
Assign CVLANs
Access layer
L2 Switch A
Create a VLAN
interface for QinQ
termination
Core layer
Device
Distribution layer
L2 Switch C
Enable QinQ and assign
SVLANs
Core layer
Device
Access layer
L2 Switch A
VLAN 11 VLAN 12 VLAN 13
Server group
L2 Switch B
Create a VLAN interface
for QinQ termination
Access port
Enable QinQ and assign SVLANs
Assign CVLANs