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CLI-based Configuration Guide - Ethernet Switching

AR650, AR1600, and AR6100 V300R003

This document describes how to configure the components for LAN services, including link aggregation groups, VLANs, voice VLANs, MAC address tables, transparent bridging, as well as GVRP, STP/RSTP, and MSTP protocols.
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Basic QinQ

Basic QinQ

Basic QinQ is implemented based on interfaces. Basic QinQ allows the device to add the outer tag to a packet received on an interface. If the received packet carries a VLAN tag, the device adds the outer VLAN tag to the packet. If the received packet does not carry any VLAN tag, the device adds the inner VLAN tag and then the outer VLAN tag.

As shown in Figure 7-2, enterprise A has two branches that connect to the carrier network through PE1 and PE2 respectively.

Figure 7-2  Networking diagram of basic QinQ

Enterprise A has different services, so different VLANs are assigned. Basic QinQ is configured on the CE interface connected to the carrier network. The outer VLAN 20 is added to the packet passing through the CE interface and removed after the packet reaches another branch. Traffic between two branches is transparently transmitted on the public network so that users using the same service in different branches of enterprise A can communicate and users using different services are isolated.

Updated: 2019-04-12

Document ID: EDOC1100041791

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