Specifications
Table Of Contents
- Contents
- Preface
- Getting Started
- Basic Router Configuration
- Interface Port Labels
- Viewing the Default Configuration
- Information Needed for Configuration
- Configuring Basic Parameters
- Configuring Static Routes
- Configuring Dynamic Routes
- Configuring Enhanced IGRP
- Basic Router Configuration
- Configuring Your Router for Ethernet and DSL Access
- Sample Network Deployments
- Configuring PPP over Ethernet with NAT
- Configuring PPP over ATM with NAT
- Configuring a LAN with DHCP and VLANs
- Configuring a VPN Using Easy VPN and an IPSec Tunnel
- Configure the IKE Policy
- Configure Group Policy Information
- Apply Mode Configuration to the Crypto Map
- Enable Policy Lookup
- Configure IPSec Transforms and Protocols
- Configure the IPSec Crypto Method and Parameters
- Apply the Crypto Map to the Physical Interface
- Create an Easy VPN Remote Configuration
- Verifying Your Easy VPN Configuration
- Configuration Example
- Configuring VPNs Using an IPSec Tunnel and Generic Routing Encapsulation
- Configuring a Simple Firewall
- Configuring a Wireless LAN Connection
- Sample Configuration
- Configuring Additional Features and Troubleshooting
- Additional Configuration Options
- Configuring Security Features
- Configuring Dial Backup and Remote Management
- Troubleshooting
- Reference Information
- Cisco IOS Software Basic Skills
- Concepts
- ROM Monitor
- Common Port Assignments
4-3
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter 4 Configuring PPP over ATM with NAT
Configure the Dialer Interface
Configure the Dialer Interface
The dialer interface indicates how to handle traffic from the clients, including, for example, default
routing information, the encapsulation protocol, and the dialer pool to use. It is also used for cloning
virtual access. Multiple PPPoA client sessions can be configured on an ATM interface, but each session
must use a separate dialer interface and a separate dialer pool.
Perform these steps to configure a dialer interface for the ATM interface on the router, starting in global
configuration mode.
Command Purpose
Step 1
interface dialer dialer-rotary-group-number
Example:
Router(config)# interface dialer 0
Router(config-if)#
Creates a dialer interface (numbered 0–255), and
enters into interface configuration mode.
Step 2
ip address negotiated
Example:
Router(config-if)# ip address negotiated
Router(config-if)#
Specifies that the IP address for the dialer
interface is obtained through PPP/IPCP (IP
Control Protocol) address negotiation.
Step 3
ip mtu bytes
Example:
Router(config-if)# ip mtu 4470
Router(config-if)#
Sets the size of the IP maximum transmission unit
(MTU). The default minimum is 128
bytes. The
maximum for ATM is 4470
bytes.
Step 4
encapsulation encapsulation-type
Example:
Router(config-if)# encapsulation ppp
Router(config-if)#
Sets the encapsulation type to PPP for the data
packets being transmitted and received.
Step 5
ppp authentication {protocol1 [protocol2...]}
Example:
Router(config-if)# ppp authentication chap
Router(config-if)#
Sets the PPP authentication method.
The example applies the Challenge Handshake
Authentication Protocol (CHAP).
For details about this command and additional
parameters that can be set, see the
Cisco IOS
Security Command Reference.
Step 6
dialer pool number
Example:
Router(config-if)# dialer pool 1
Router(config-if)#
Specifies the dialer pool to use to connect to a
specific destination subnetwork.