Specifications

1-2
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 1 Network Design and Case Study Overview
Scenario Description
Both companies

Enable remote modem users to access IP backbone resources through the public switched telephone
network (PSTN).

Build an access network foundation that scales to support larger dial implementations for the
future.

Have almost identical technology requirements and business applications. Therefore, one business
scenario diagram is shown for both companies. Figure 1-1 shows the business scenario.
Figure 1-1 Business Scenario
This case study describes how to set up one network access server (NAS). Setting up the following
components is outside the scope of this document:

NAS stacking

AAA server setup

IP address scaling

Remote-node ISDN configuration (synchronous PPP)
Remote modem
users
Headquarters
providing dial-up
services
25672
Internet
firewall
IP intranet
PSTN
Internet