Cisco Systems OL-6426-02 manual Specifies that the IP address for the dialer

Chapter 4 Configuring PPP over ATM with NAT

Configure the Dialer Interface

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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	Creates a dialer interface (numbered 0–255), and
		enters into interface configuration mode.
	Example:
	Router(config)# interface dialer 0
	Router(config-if)#
Step 2
	ip address negotiated	Specifies that the IP address for the dialer
		interface is obtained through PPP/IPCP (IP
	Example:	Control Protocol) 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 ATM is 4470 bytes.
	Router(config-if)# ip mtu 4470
	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.
	Example:	The example applies the Challenge Handshake
		Authentication Protocol (CHAP).
	Router(config-if)#ppp authentication chap	For details about this command and additional
	Router(config-if)#
		parameters that can be set, see the Cisco IOS
		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 4-3