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2 Selective QinQ Configuration
When configuring selective QinQ, go to these sections for information you are interested in:
z Selective QinQ Overview
z Selective QinQ Configuration
z Selective QinQ Configuration Example
Selective QinQ Overview
Selective QinQ Overview
Selective QinQ is an enhanced application of the VLAN-VPN feature. With the selective QinQ feature,
you can configure inner-to-outer VLAN tag mapping, according to which you can add different outer
VLAN tags to the packets with different inner VLAN tags.
The selective QinQ feature makes the service provider network structure more flexible. You can classify
the terminal users on the port connecting to the access layer device according to their VLAN tags, and
add different outer VLAN tags to these users. In the public network, you can configure QoS policies
based on outer VLAN tags to assign different priorities to different packets, thus providing differentiated
services. See
Figure 2-1 for details.
Figure 2-1 Diagram for a selective QinQ implementation
VIP
VLAN101~200
User
VLAN8 ~100
IP Phone
VLAN201~300
VLAN 8~300
VLAN 1001~1003
Server
VLAN8~100
VIP Server
VLAN101~200
VoIP Device
VLAN201~300
SwitchA
Public Network
VLAN1001/1002/1003
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