Cisco Profile Series Configuration Manual - Page 9

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Chapter 4

Configuring the Serial Interface

DETAILED STEPS

Command or Action

Step 1

physical-layer async

Example:

Router(config-if)# physical-layer async

You cannot use the physical-layer async command for frame-relay encapsulation.

Note

When you make a transition from asynchronous mode to synchronous mode in serial interfaces, the

interface state becomes down by default. You should then use the no shutdown option to bring the

interface up.

Configuration Examples

Example: PPP Configuration:

This example shows how to configure PPP encapsulation with CHAP authentication.

Router> enable

Router# configure terminal

Router(config)# hostname R1

R1(config)# username R2 password cisco

R1(config)# interface serial 0/0/0

R1(config-if)# encapsulation ppp

R1(config-if)# ppp authentication chap

R1(config-if)# exit

Router> enable

Router# configure terminal

Router(config)# hostname R2

R2(config)# username R1 password

R2(config)# interface serial 0/0/0

R2(config-if)# encapsulation ppp

R2(config-if)# ppp authentication chap

R2(config-if)# exit

This example shows how to configure PPP encapsulation with PAP authentication.

Router> enable

Router# configure terminal

Router(config)# hostname R1

R1(config)# username R2 password cisco

R1(config)# interface serial 0/0/0

R1(config-if)# encapsulation ppp

R1(config-if)# ppp authentication PAP

R1(config-if)# ppp pap sent-username R1 password cisco

R1(config-if)# end

Router> enable

Router#configure terminal

Purpose

Specifies the mode of a low-speed interface as either

synchronous or asynchronous.

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Cisco 800M Series Integrated Services Routers Software Configuration Guide

Configuration Examples