Ccna routing and Switching Complete Study Guide

Configuring PPP on Cisco Routers

Configuring PPP encapsulation on an interface is really pretty straightforward. To 

configure it from the CLI, use these simple router commands:

Router#

config t

Router(config)#

int s0

Router(config-if)#

encapsulation ppp

Router(config-if)#

^Z

Of course, PPP encapsulation has to be enabled on both interfaces connected to a serial 

line in order to work, and there are several additional configuration options available to 

you via the 

ppp ?

 command.

Configuring PPP Authentication

After you configure your serial interface to support PPP encapsulation, you can then 

configure authentication using PPP between routers. But first, you must set the hostname 

of the router if it hasn’t been set already. After that, you set the username and password for 

the remote router that will be connecting to your router, like this:

Router#