Datasheet
Lab – Troubleshooting Basic PPP with Authentication
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Ethernet and serial cables as shown in the topology
Part 1: Build the Network and Load Device Configurations
In Part 1, you will set up the network topology, configure basic settings on the PC hosts, and load
configurations on the routers.
Step 1: Cable the network as shown in the topology.
Step 2: Configure the PC hosts.
Step 3: Load router configurations.
Load the following configurations into the appropriate router. All routers have the same passwords. The
privileged EXEC mode password is class. The password for console and vty access is cisco. All serial
interfaces should be configured with PPP encapsulation and authenticated with CHAP using the password of
chap123.
Router R1 Configuration:
hostname R1
enable secret class
no ip domain lookup
banner motd #Unauthorized Access is Prohibited!#
username R2 password chap123
username R3 password chap123
interface g0/1
ip address 192.168.1.1 255.255.255.0
no shutdown
interface s0/0/0
ip address 192.168.12.1 255.255.255.252
clock rate 128000
encapsulation ppp
ppp authentication chap
! no shutdown
interface s0/0/1
ip address 192.168.31.1 255.255.255.252
! ip address 192.168.13.1 255.255.255.252
encapsulation ppp
ppp authentication pap
! ppp authentication chap
! no shutdown
exit
router ospf 1
router-id 1.1.1.1
network 192.168.1.0 0.0.0.255 area 0
network 192.168.12.0 0.0.0.3 area 0
network 192.168.13.0 0.0.0.3 area 0
passive-interface g0/1