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How to configure PPP on a Cisco router using the Cisco SDM

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This article will show you how to configure PPP (Point-to-Point Protocol) using Cisco SDM in order to enable communication between two routers connected through a serial link. This tutorial includes how to enable PPP encapsulation, and configure CHAP authentication. This article is designed for CCNA students, network engineers, and anyone looking to configure PPP using Cisco SDM (Cisco SDM is part of the CCNA syllabus).

The Point-to-Point Protocol (PPP) provides a standard method for transporting multi-protocol datagrams between two peers. PPP is comprised of three main components:

A method for encapsulating multi-protocol datagrams.
A Link Control Protocol (LCP) for establishing, configuring, and testing the data-link connection.
A family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols.

Follow these steps in order to configure PPP on a serial interface using Cisco SDM:

Step 1: Open Cisco SDM.
Step 2: Click Configure in order to start Configuration.
Step 3: In the tasks bar, click Interfaces and Connections.
Step 4: Select the Serial (PPP, HDLC, or Frame Relay) option, and then click Create New Connection.
Step 5: Click Next.
Step 6: In the Available Interfaces drop-down list, select the interface to configure, and then click Next.
Step 7: Choose PPP as the encapsulation type, and click Next.
Step 8: Enter the IP address and the subnet mask for your serial interface, and then click Next.
Step 9: Choose Default Static Route if you want to make the Router on the other end of the PPP link your  default gateway. If not, simply click Next.
Step 10: Click Finish, and then click OK.

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