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CLI-based Configuration Guide - VPN

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document describes VPN features on the device and provides configuration procedures and configuration examples.
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Overview of L2TPv3

Overview of L2TPv3


Layer 2 Tunneling Protocol - Version 3 (L2TPv3) sets up Layer 2 access links to transparently transmit Layer 2 packets, such as Point-to-Point Protocol (PPP), Ethernet, High-Level Data Link Control (HDLC), and asynchronous transfer mode (ATM) packets, over a packet switched network (PSN).


Currently, L2TPv3 feature of the router can transparently transmit only Ethernet packets, and user-side interfaces must be VLANIF interfaces, wide area network (WAN) interfaces, or sub-interfaces.


Virtual leased lines (VLL) can be deployed to set up Layer 2 connections between the headquarters and branch or between branches. However, the VLL deployment cost is high. L2TPv3 can set up Layer 2 connections between enterprise branches and the headquarters or between branches, without a need to reconstruct the existing IP networks. Compared with the VLL solution, L2TPv3 helps carriers lower network construction costs, so that enterprises can obtain network services at lower expenses.

Updated: 2019-08-07

Document ID: EDOC1100033725

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