Bng Architecture; Cisco Asr 9000 Series Aggregation Services Router Broadband Network Gateway Configuration Guide - Cisco ASR 9000 Series Configuration Manual

BNG Architecture

Some benefits of using BNG are:
• The BNG router not only performs the routing function but also communicates with authentication,
• Different subscribers can be provided different network services. This enables the service provider to
BNG Architecture
The goal of the BNG architecture is to enable the BNG router to interact with peripheral devices (like CPE)
and servers (like AAA and DHCP), in order to provide broadband connectivity to subscribers and manage
subscriber sessions. The basic BNG architecture is shown in the following figure.
Figure 1: BNG Architecture
The BNG architecture is designed to perform these tasks:
• Connecting with the Customer Premise Equipment (CPE) that needs to be served broadband services.
• Establishing subscriber sessions using IPoE or PPPoE protocols.
• Interacting with the AAA server that authenticates subscribers, and keeps an account of subscriber
• Interacting with the DHCP server to provide IP address to clients.
The four BNG tasks are briefly explained in the following sections.
Connecting with the CPE
BNG connects to the CPE through a multiplexer and Home Gateway (HG). The CPE represents the triple
play service in telecommunications, namely, voice (phone), video (set top box), and data (PC). The individual

Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Configuration Guide,

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authorization, and accounting (AAA) server to perform session management and billing functions. This
makes the BNG solution more comprehensive.
customize the broadband package for each customer based on their needs.
sessions.
Broadband Network Gateway Overview
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