Cisco CISCO851-K9 - 851 Integrated Services Router User Manual

4-3
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
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.

Cisco CISCO851-K9 - 851 Integrated Services Router Specifications

General

Brand	Cisco
Model	CISCO851-K9 - 851 Integrated Services Router
Category	Network Router
Language	English