Cisco 1400 Series Routers

Document ID: 12832

Contents

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

Introduction

This document provides a sample configuration that shows a Cisco 1417 Digital Subscriber Line (DSL) Router connected to a Cisco 6130 Digital Subscriber Line Access Multiplexer (DSLAM) and terminating on a Cisco 6400 Universal Access Concentrator (UAC).

The Cisco 1417 is configured with RFC1483 Bridging (using aal5snap) and the Cisco 6400 is configured with routed bridge encapsulation (RBE). The ATM RBE feature on the Cisco 6400 node route processor (NRP) is used to route IP over bridged RFC1483 Ethernet traffic from a stub-bridged LAN.

Bridged IP packets received on an ATM interface configured in route-bridged mode are routed via the IP header. This interface takes advantage of the characteristics of a stub LAN topology commonly used for DSL access, and offers increased performance and flexibility over integrated routing and bridging (IRB).

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 1417 DSL Router IOS® Software Release 12.1(1.3)T

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

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

• Cisco 6130 DSLAM-NI2 IOS Software Release 12.1(1)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

Refer to Cisco Technical Tips Conventions for more information on document conventions.

Configure

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

Note: Use the Command Lookup Tool ( registered customers only) to obtain more information on the commands used in this section.

Network Diagram

This document uses this network setup:

Configurations

This document uses these configurations:

• Cisco 1417-1

• Cisco 6400-NRP1

In order to Telnet to (or ping) the Cisco 1417 from the Internet, you must configure an IP address and a MAC address on the ATM interface. For the IP address, configure the same IP address on the ATM interface that you configured on the Ethernet interface. For the MAC address, issue the show interface eth0 command. Note the MAC address and configure this same MAC address on the ATM interface.

When the Cisco 1417 is bridging IP on the Ethernet and ATM interfaces, both interfaces can have the same IP address.

Note the no ip routing command in the configuration.

Current configuration:
!
version 12.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
ip subnet-zero
no ip routing
!
!
!
!
interface Ethernet0
ip address 10.0.0.1 255.0.0.0
no ip route-cache
bridge-group 1
!
interface ATM0
mac-address 0010.7bf0.8c40
ip address 10.0.0.1 255.0.0.0
atm vc-per-vp 4096
atm ilmi-keepalive
pvc 1/44
encapsulation aal5snap
!
bridge-group 1
!
ip classless
no ip http server
!
bridge 1 protocol ieee
!
line con 0
end

Current configuration:
!
version 12.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname NRP1
! 
!
redundancy
 main-cpu
auto-sync standard
no secondary console enable
ip subnet-zero
!
interface Loopback1
ip address 10.0.0.2 255.0.0.0
no ip directed-broadcast
!
interface ATM0/0/0
no ip address
no ip directed-broadcast
       
no ip mroute-cache
no atm ilmi-keepalive
!
!
interface ATM0/0/0.4 point-to-point
description for 1417-1
ip unnumbered Loopback1
no ip directed-broadcast
no ip mroute-cache
atm route-bridged ip
pvc 1/44 
encapsulation aal5snap
!
!
interface Ethernet0/0/1
no ip address
no ip directed-broadcast
!
interface Ethernet0/0/0
no ip address
no ip directed-broadcast
!
interface FastEthernet0/0/0
no ip address
no ip directed-broadcast
half-duplex
!
ip classless
ip route 10.0.0.1 255.255.255.255 ATM0/0/0.4
!
line con 0
!
end

Verify

There is currently no verification procedure available for this configuration.

Troubleshoot

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

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Related Information

• Cisco 1400 Series Router Installation and Configuration Guide
• Technical Support & Documentation - Cisco Systems