Concept Of Qinq; Qinq Features Supported By The S9300; Configuring Qinq On An Interface; Establishing The Configuration Task - Huawei Quidway S9300 Configuration Manual

5 QinQ Configuration

5.1 Concept of QinQ

This section describes the concept of QinQ.
The 802.1Q-in-802.1Q (QinQ) protocol is a Layer 2 tunneling protocol based on the IEEE
802.1Q technology. The frame transmitted on the public network has double 802.1Q tags. One
is a public tag and the other is a private tag. It is thus called the QinQ protocol.
The principle of QinQ is to encapsulate a private VLAN tag in a public VLAN tag; thus, a packet
traverses the backbone network of the Internet service provider (ISP) carrying double VLAN
tags. By using the QinQ technology, the S9300 provides a simpler Layer 2 VPN tunnel for users.

5.2 QinQ Features Supported by the S9300

This section describes the QinQ features supported by the S9300.
Selective QinQ
The S9300 supports selective QinQ, which is extended on the basis of QinQ. Selective QinQ
enables an interface to add the outer VLAN tags with different public VLAN IDs to frames
according to the private VLAN IDs in the inner VLAN tags. This can thus differentiate various
types of users.
The S9300 not only supports selective QinQ based on the interface and VLAN, but also supports
flow-based selective QinQ.
For the commands related to flow-based selective QinQ, see the Quidway S9300 Terabit Routing
Switch Command Reference - QoS.
Protocols Used by Outer VLAN Tags
The protocols applied to outer VLAN tags vary according to the vendors. To interwork with
non-Huawei devices, the S9300 supports the selective setting of the protocols used by the outer
VLAN tags.

5.3 Configuring QinQ on an Interface

This section describes how to configure the interface type, the protocol used by the outer VLAN
tag, and the interface-based QinQ.

5.3.1 Establishing the Configuration Task

5.3.2 Setting the Link Type of an Interface
5.3.3 Specifying the Outer VLAN ID
5.3.4 Checking the Configuration
5.3.1 Establishing the Configuration Task
5-2 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Quidway S9300 Terabit Routing Switch
Configuration Guide - Ethernet
Issue 03 (2009-08-20)