Cisco 1700 series Manuale utente

Configuring a Cisco 1700/2600/3600 ADSL WIC to

Support PPPoE Clients, Terminating on a Cisco

6400 UAC

Document ID: 12963

Contents

Introduction

Prerequisits

Requirements

Components Used

Conventions

Configure

Network Diagram

Configurations

Verify

Troubleshoot

Related Information

Introduction

The Cisco 1700, 2600, and 3600 series routers support the Asymmetric Digital Subscriber Line (ADSL)

WAN Interface Card (WIC). All three platforms are configured essentially the same, but there are differences

in hardware and in the Cisco IOS® Software release required for each one. Throughout this document, the

Cisco 1700/2600/3600 is referred to as the Cisco ADSL WIC.

This sample configuration shows you how to support a Point−to−Point Protocol over Ethernet (PPPoE) client

when it is connected to the Ethernet interface of a Cisco ADSL WIC.

The Cisco ADSL WIC is configured with RFC 1483 bridging and terminates on a Cisco 6400 Universal

Access Concentrator (UAC) that has been configured to support PPPoE using a multipoint ATM subinterface.

The PPPoE feature allows you to initiate a PPP session on a simple bridging Ethernet connected client. The

session is transported over the ATM link via encapsulated Ethernet−bridged frames. The session can be

terminated at either a local exchange carrier central office or an Internet service provider (ISP) point of

presence.

PPPoE is a client−initiated connection. On the Customer Premises Equipment (CPE) side, a PC with an

Ethernet Network Interface Card (NIC) and the PPPoE client code are established. This PC and other PCs are

connected to the ADSL WIC Ethernet segment.

The ADSL WIC ATM interface is connected to a Cisco 6130 DSL Access Multiplexer (DSLAM) and

terminates on a Cisco 6400 UAC.

Prerequisits

Requirements

Before you attempt this configuration, please ensure that you use one of these prerequisite software releases:

Cisco 6400 UAC−NRP IOS Software Release 12.1(3)DC1• Cisco 6400 UAC−NSP IOS Software Release 12.1(3)DB• Cisco 6130 DSLAM−NI2 IOS Software Release 12.1(5)DA•

Components Used

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

To support the ADSL WIC on the Cisco 2600 or 3600, these hardware components are required:

2600: Chassis WIC slots, NM−2W• 3600: NM−1FE1R2W, NM−1FE2W, NM−2FE2W, NM−2W•

Note: For the Cisco 3600, ADSL is not supported on WIC NM−1E1R2W, NM−1E2W, or NM−2E2W.

These are the minimum Cisco IOS Software Releases required to support the ADSL WIC:

Cisco IOS Software Release 12.1(5)YB (Plus versions only) on the Cisco 2600 or 3600• Cisco IOS Software Release IOS 12.1(3)XJ or later (Plus versions or ADSL feature set only) on the

Cisco 1700. The ADSL feature set is identified by "y7" in the image name; for example,

c1700−sy7−mz.121−3.XJ.bin.

•

Note: When you download the image for the Cisco 1700, make sure you select the image name of 1700. Do

not download a 1720 or a 1750 image; the features do not support the ADSL WIC.

The information presented in this document was created from devices in a specific lab environment. All of the

devices used in this document started with a cleared (default) configuration. If you are in a live network,

ensure that you understand the potential impact of any command before you use use it.

Conventions

For more information on document conventions, see 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 the diagram below.

Configurations

This document uses the configurations shown below.

Note: In the Cisco 6400 NRP configuration, you set the Maximum Transmission Unit (MTU). For more

information about changing the MTU size, refer to Troubleshooting MTU Size in PPPoE Dialin Connectivity.

Cisco ADSL WIC

Current configuration:

version 12.1

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

no service password−encryption

hostname R1

ip subnet−zero

no ip routing

interface FastEthernet0

no ip address

no ip directed−broadcast

bridge−group 1

interface ATM0

no ip address

no ip directed−broadcast

no ip mroute−cache

no atm ilmi−keepalive

pvc 3/100

encapsulation aal5snap

bundle−enable

bridge−group 1

hold−queue 224 in

ip classless

no ip http server

bridge 1 protocol ieee

line con 0

end

Cisco 6400 NRP

Current configuration:

version 12.0

service timestamps debug uptime

service timestamps log uptime

no service password−encryption

hostname NRP1

username username password password

!−−− The username and password must match client username and password.

redundancy

main−cpu

auto−sync standard

no secondary console enable

ip subnet−zero

ip cef

vpdn enable

vpdn−group 1

accept−dialin

protocol pppoe

virtual−template 1

pppoe limit per−mac 101

pppoe limit per−vc 102

interface ATM0/0/0

no ip address

no ip directed−broadcast

no ip mroute−cache

no atm ilmi−keepalive

interface ATM0/0/0.1 multipoint

no ip directed−broadcast

pvc 3/100

encapsulation aal5snap

protocol pppoe

interface Ethernet0/0/1

ip address 10.0.0.1 255.0.0.0

no ip directed−broadcast

interface Ethernet0/0/0

no ip address

no ip directed−broadcast

shutdown

interface FastEthernet0/0/0

no ip address

no ip directed−broadcast

half−duplex

interface Virtual−Template1

!−−− Do not use a static IP assignment within

!−−− a virtual template; routing problems can occur.

ip mtu 1492

ip unnumbered Ethernet0/0/1

!−−− Always use the ip unnumbered command

!−−− when configuring a virtual template.

no ip directed−broadcast

ip mroute−cache

peer default ip address pool pool name

ppp authentication chap

ip local pool pool name 10.0.0.2 10.0.0.12

ip classless

no ip http server

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.

Related Information

Cisco DSL Technology Support Information• Cisco DSL Product Support Information• Technical Support − Cisco Systems•

Contacts & Feedback | Help | Site Map

Cisco Systems, Inc.

Updated: Feb 26, 2008 Document ID: 12963

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