Operation Manual – VLAN-VPN
H3C S3100 Series Ethernet Switches
Chapter 2 Selective QinQ Configuration
2-2
Figure 2-1
Diagram for a selective QinQ implementation
In this implementation, Switch A is an access device of the service provider. The users
connecting to it include common customers (in VLAN 8 to VLAN 100), VIPs (in VLAN
101 to VLAN 200), and IP telephone users (in VLAN 201 to VLAN 300). Packets of all
these users are forwarded by Switch A to the public network.
After the selective QinQ feature and the inner-to-outer tag mapping feature are enabled
on the port connecting Switch A to these users, the port will add different outer VLAN
tags to the packets according to their inner VLAN tags. For example, you can configure
to add the tag of VLAN 1002 to the packets of IP telephone users in VLAN 201 to VLAN
300 and forward the packets to the VoIP device, which is responsible for processing IP
telephone services.
To guarantee the quality of voice packet transmission, you can configure QoS policies
in the public network to reserve bandwidth for packets of VLAN 1002 and forward them
preferentially.
In this way, you can configure different forwarding policies for data of different type of
users, thus improving the flexibility of network management. On the other hand,
network resources are well utilized, and users of the same type are also isolated by
their inner VLAN tags. This helps to improve network security.
2.2 Selective QinQ Configuration
2.2.1 Selective QinQ Configuration Task List
Complete the following tasks to configure selective QinQ:
