Guest

Cisco SOHO 70 Series Routers

Configuring a Cisco SOHO77 Router With IP Unnumbered E0, DHCP, PPPoA, and PPP-PAP

Document ID: 12921



Contents

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

Introduction

This sample configuration shows a Cisco SOHO77 Digital Subscriber Line (DSL) Router connecting to a Cisco 6130 Digital Subscriber Line Access Multiplexer (DSLAM) and terminating on a Cisco 6400 Universal Access Concentrator (UAC). The Cisco SOHO77 is configured as a Dynamic Host Configuration Protocol (DHCP) server with point-to-point protocol (PPP) over ATM (PPPoA).

The Internet Service Provider (ISP) has given 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 SOHO77. The remaining IP addresses are assigned to a DHCP pool and leased to local LAN devices attached to the Ethernet network of the Cisco SOHO77.

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 SOHO77 Customer Premises Equipment (CPE) IOS® Software Release 12.1(3)XP2

  • Cisco 6400 UAC-Node Route Processor (NRP) IOS Software Release 12.1(3)DC1

  • Cisco 6400 UAC-Node Switch Processor (NSP) IOS Software Release 12.1(3)DB

  • Cisco 6130 DSLAM-NI2 IOS Software Release 12.1(5)DA

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 to configure the features described in this document.

Note: 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.

soho77unnum.gif

Configurations

This document uses the configuration shown here.

Cisco SOHO77

! 
version 12.1
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; its used by interface E0.

!
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
 
!--- Default gateway is assigned to local devices.

! 
interface Ethernet0 
 ip address 10.0.0.1 255.0.0.0 
 no ip directed-broadcast 
 no ip mroute-cache
! 
interface ATM0 
 no ip address 
 no ip directed-broadcast 
 no ip mroute-cache 
 no atm ilmi-keepalive
 pvc 1/150 
  encapsulation aal5mux ppp dialer 
  dialer pool-member 1 
 !
 hold-queue 224 in 
! 
interface Dialer0 
 ip unnumbered Ethernet0 
 no ip directed-broadcast 
 encapsulation ppp 
 dialer pool 1 
 dialer-group 1 
 ppp pap sent-username 
<username>
 password 
<password>

! 
ip classless 
ip route 0.0.0.0 0.0.0.0 Dialer0 
no ip http server 
! 
dialer-list 1 protocol ip permit
! 
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



Updated: Feb 26, 2008 Document ID: 12921