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DES-7200 Configuration Guide Chapter 12 QinQ Configuration
12-24
Figure 8 Topology for using basic QinQ to realize layer-2 VPN service
12.3.1.2 Application requirements
The service provider provides VPN service for Company A and Company B, and
the specific requirements are shown below:
1. The data of both companies can preserve the original VLAN information
when being sent to the peer side.
2. Data with same VLAN ID won't cause conflict during transmission over ISP
network.
12.3.1.3 Configuration tips
1. You don't need to distinguish the traffic of downlink users. Enabling basic
QinQ on the provider edge devices (Provider A and Provider B) will meet the
needs.
2. The TPID of DES-7200 switches is different from the TPID used by other
manufacturers. You need to configure on the Uplink interface of provider edge
devices (Provider A and Provider B) and set TPID to the same value with
third-party devices.