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Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Chapter 1 Preparing for Configuration
Configuration Overview
DSL Aggregation
shows an MGX switch operating in a Digital Subscriber Line (DSL) edge aggregation
topology.
Figure 1-4
DSL Edge Aggregation Topology
In the DSL edge aggregation topology, the switch is colocated with Digital Subscriber Line Access
Multiplexers (DSLAMs) and communicates with one or more core switches at remote locations. The
switch aggregates the DSL traffic from multiple DSLAMs and packages it for high-speed
communications over the core.
Typically, DSL edge nodes communicate with colocated DSLAMs over relatively slower broadband
trunks such as DS3 and E3 trunks. The DSL edge node communicates with core nodes using relatively
faster links such as OC-3, OC-12, and OC-48 trunks.
Configuration Overview
Switch configuration is easier if you are familiar with the overall configuration process. To configure
and start up the switch, you need to do some or all of the following tasks:
•
Collect information you will need during the configuration process
•
Configure general switch features
•
Configure the physical connections to other devices
•
Provision ATM connections
•
Enable PNNI call routing
The sections that follow describe how to collect or create the information you need to complete these
tasks.
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Core ATM
network
DSLAMs
DSL lines
