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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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Multi-service Transparent Transmission over PWs on a MAN

Multi-service Transparent Transmission over PWs on a MAN

In many carrier-class services, carriers use digital subscriber line access multiplexers (DSLAMs) or Ethernet switches to provide access lines such as asymmetric digital subscriber line (ADSL), very-high-data-rate digital subscriber line (VDSL), or Ethernet links and need to control various services. Service control includes Point-to-Point Protocol over Ethernet (PPPoE) access request termination, IP address assignment, user authentication, authorization, and accounting. Terminal access gateways are responsible for service control. As large-capacity and high-performance terminal access gateway (Huawei ME60 for example) are developed, terminal access gateway are moving gradually upward to the metropolitan area network (MAN) egress. This means that DSLAMs are connected to the MAN, and integrated terminal access gateway are deployed at the MAN egress to control services.

Terminal access gateway usually exchange information with users through Layer 2 links. For example, a terminal access gateway obtains user names and passwords through PPPoE sessions. However, a MAN is a Layer 3 IP/MPLS network. If Layer 2 user information is terminated on the UPE devices connected to DSLAMs, terminal access gateway cannot obtain required information through Layer 2 connections, and therefore they cannot control services. To solve this problem, VLLs can be set up on the MAN to transmit Layer 2 packets exchanged between BRASs and users over PWs.

Figure 10-16  Multi-service transparent transmission over PWs on a MAN

Updated: 2019-08-07

Document ID: EDOC1100033725

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