Specifications

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Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Chapter 1 Preparing for Configuration
Routing Technologies
Figure 1-4 shows the switch operating in a Digital Subscriber Link (DSL) edge aggregation topology.
Figure 1-4 DSL Edge Aggregation Topology
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.
Routing Technologies
This release of the Cisco MGX 8850 and the Cisco MGX 8950 switches supports both Private
Network-to-Network Interface (PNNI) and Multiprotocol Label Switching (MPLS) routing. These
protocols can be used simultaneously on the same switch and on the same link.
Configuration Tasks
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:
• Configure general switch features
• Configure the physical connections to other devices
• Provision ATM connections to other devices
• Enable MPLS or PNNI call routing
This chapter describes how to collect or create the information you need to complete these tasks. These
tasks are described in the following chapters:
Chapter 2, “Configuring General Switch Features,” describes how to set up general switch features such
as the date, the PNNI controller, and network management. You need to follow the procedures in this
chapter to prepare your switch for general operation.
Chapter 3, “Preparing AXSM Cards and Lines for Communication,” describes how to configure card and
line redundancy, and how to bring up lines for physical layer communications.
Chapter 5, “Preparing RPM-PR Cards for Operation,” describes how to initialize RPM cards and
configure card redundancy to support of MPLS routing and communications.
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Core ATM
network
DSLAMs
DSL lines