Datasheet

Lab – Configuring a Router as a PPPoE Client for DSL

Connectivity (Instructor Version)

Instructor Note: Red font color or Gray highlights indicate text that appears in the instructor copy only.

Topology

Addressing Table

Device

Interface

IP Address

Subnet Mask

Default Gateway

Cust1

G0/1

Learned via PPP

ISP

G0/1

N/A

Objectives

Part 1: Build the Network

Part 2: Configure the ISP Router

Part 3: Configure the Cust1 Router

Background / Scenario

ISPs often use Point-to-Point Protocol over Ethernet (PPPoE) on DSL links to their customers. PPP supports

the assignment of IP address information to a device at the remote end of a PPP link. More importantly, PPP

supports CHAP authentication. ISPs can check accounting records to see if a customer’s bill has been paid,

before letting them connect to the Internet.

In this lab, you will configure both the client and ISP side of the connection to set up PPPoE. Typically, you

would only configure the client end.

Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services Routers (ISRs) with

Cisco IOS Release 15.2(4)M3 (universalk9 image). The switches used are Cisco Catalyst 2960s with Cisco

IOS Release 15.0(2) (lanbasek9 image). Other routers, switches, and Cisco IOS versions can be used.

Depending on the model and Cisco IOS version, the commands available and output produced might vary

from what is shown in the labs. Refer to the Router Interface Summary Table at the end of this lab for the

correct interface identifiers.

Note: Ensure that the routers and switches have been erased and have no startup configurations. If you are

unsure, contact your instructor.