Asymmetric Digital Subscriber Line (ADSL)

Document ID: 12874

Contents

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
Configure
      Network Diagram
      Configurations
Verify
Troubleshoot
Related Information

Introduction

This sample configuration shows a Cisco 804 ISDN Digital Subscriber Line (IDSL) router that connects to a Digital Subscriber Line Access Multiplexer (DSLAM) and terminates on a Cisco 6400 Universal Access Concentrator (UAC). The Cisco 804 is configured as a Dynamic Host Configuration Protocol (DHCP) server with PPP encapsulation.

The Internet Service Provider (ISP) provides the subscriber a range of IP addresses, 10.0.0.1 to 10.0.0.X, with a mask of 255.0.0.0. IP address "10.0.0.1" is manually configured on the Ethernet interface of the Cisco 804. The IP addresses that remain are assigned to a DHCP pool and leased to local LAN devices attached to the Ethernet network of the Cisco 804.

Note: Refer to Installing and Configuring Cisco 802 IDSL and Cisco 804 IDSL Routers when you configure the Cisco 804 with Frame Relay encapsulation.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on these software and hardware versions:

• Cisco 804 IDSL Customer Premises Equipment (CPE) IOS® Software Release 12.0(5)T

• Cisco 6400 UAC-NRP IOS Software Release 12.0(7)DC

• Cisco 6400 UAC-NSP IOS Software Release 12.0(4)DB

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

For more information on document conventions, refer to the Cisco Technical Tips Conventions.

Configure

In this section, you are presented with the information you can use in order to configure the features described in this document.

Note: In order to find additional information on the commands used in this document, use the Command Lookup Tool (registered customers only) .

Network Diagram

This document uses the network setup shown in this diagram.

Configurations

This document uses this configuration.

! 
version 12.0
service timestamps debug datetime msec 
service timestamps datetime msec 
! 
hostname R1 
! 
ip subnet-zero 
! 
ip dhcp excluded-address 10.0.0.1

!--- The DHCP pool does not lease this address.
!--- It is used by interface E.
0
!
ip dhcp pool <pool name>
 network 10.0.0.0 255.0.0.0

!--- Adjust this for your range of addresses.

 default-router 10.0.0.1

!--- The default gateway is assigned to local devices.

!
isdn switch-type <switch-type>
isdn leased-line BRI0 128
! 
interface Ethernet0 
 ip address 10.0.0.1 255.0.0.0 
 no ip directed-broadcast 
 no ip mroute-cache
! 
 interface BRI0
  ip unnumbered Ethernet0 
  no ip directed-broadcast 
   encapsulation ppp 
  compress stac
  ppp pap sent-username <username> password <password>
! 
ip classless 
ip route 0.0.0.0 0.0.0.0 BRI0
! 
end 

Verify

There is currently no verification procedure available for this configuration.

Troubleshoot

There is currently no specific troubleshooting information available for this configuration.

Related Information

• DSL Technical Support
• Technical Support - Cisco Systems