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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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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Overview of PWE3

Overview of PWE3

This section describes the PWE3 definition, purpose, and functions.


Pseudo-Wire Emulation Edge to Edge (PWE3) is a point-to-point (P2P) technology that transmits Layer 2 services on a multiprotocol label switching Layer 2 virtual private network (MPLS L2VPN). PWE3 simulates essential attributes of a service such as Asynchronous Transfer Mode (ATM), Frame Relay (FR), Ethernet, low-speed Time Division Multiplexing (TDM) circuit, Synchronous Optical Network (SONET), or Synchronous Digital Hierarchy (SDH) on a Packet Switched Network (PSN).


The IP network has rapidly developed in recent years because of its flexible upgrade, scalability, and interoperability. Limited by the transmission mode and services, the traditional communications network has low flexibility. To make full use of existing or public network resources during upgrade and expansion of the traditional communications network, PWE3 is used to integrate the traditional communications network and PSN.

PWE3 often applies to the broadband metro access network (MAN) or mobile bearer network to transmit various services including Ethernet, ATM, TDM, FR, and PPP. As shown in Figure 11-1, the headquarters of company A and its branch are located on the traditional communications network such as ATM or FR. PWE3 is used to establish a PW between PE1 and PE2 so that the headquarters of company A and its branch can communicate over the MPLS network. PWE3 integrates original access modes with existing IP backbone network to reduce repetitious network construction, saving operation costs.

Figure 11-1  PWE3 networking

PWE3 allows various services to be transmitted and supports migration from the mobile network to Long Term Evolution (LTE). PWE3 protects carrier investments when ATM and TDM services are migrated to the IP network.

Updated: 2019-08-07

Document ID: EDOC1100033725

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