Chapter 3 Configuring PPP over Ethernet 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. The dialer interface is also used for cloning virtual access. Multiple PPPoE client sessions can be configured on a Fast Ethernet interface, but each session must use a separate dialer interface and a separate dialer pool.

Complete the following steps to configure a dialer interface for one of the Fast Ethernet LAN interfaces on the router, starting in global configuration mode.

 

Command

Purpose

Step 1

 

 

interface dialer dialer-rotary-group-number

Creates a dialer interface (numbered 0–255), and

 

 

enters interface configuration mode.

 

Example:

 

 

Router(config)# interface dialer 0

 

 

Router(config-if)#

 

Step 2

 

 

ip address negotiated

Specifies that the IP address for the interface is

 

 

obtained through PPP/IPCP (IP Control Protocol)

 

Example:

address negotiation.

 

Router(config-if)#ip address negotiated

 

 

Router(config-if)#

 

Step 3

 

 

ip mtu bytes

Sets the size of the IP maximum transmission unit

 

 

(MTU). The default minimum is 128 bytes. The

 

Example:

maximum for Ethernet is 1492 bytes.

 

Router(config-if)# ip mtu 1492

 

 

Router(config-if)#

 

Step 4

 

 

encapsulation encapsulation-type

Sets the encapsulation type to PPP for the data

 

 

packets being transmitted and received.

 

Example:

 

 

Router(config-if)# encapsulation ppp

 

 

Router(config-if)#

 

Step 5

 

 

ppp authentication {protocol1 [protocol2...]}

Sets the PPP authentication method to Challenge

 

 

Handshake Authentication Protocol (CHAP).

 

Example:

For details about this command and additional

 

 

 

Router(config-if)#ppp authentication chap

parameters that can be set, see the Cisco IOS

 

Router(config-if)#

Security Command Reference.

 

 

Step 6

 

 

dialer pool number

Specifies the dialer pool to use to connect to a

 

 

specific destination subnetwork.

 

Example:

 

 

Router(config-if)# dialer pool 1

 

 

Router(config-if)#

 

 

 

 

Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide

 

OL-6426-02

3-5

 

 

 

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Cisco Systems OL-6426-02 manual Configure the Dialer Interface
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