Lab 10 : PPP Configuration
Objective
This tutorial includes :
Basic Configuration tasks on a router,
Configuring OSPF routing protocol,
Configuring PPP PAP and CHAP authentication.
Network diagram
Task 1
configure the interfaces on R1
Task 2
configure the interfaces on R2
Task 3
configure the interfaces on R3
Task 4
Now that all devices are connected we can start by configuring OSPF (so that each router knows about each other network). (On the R1 we are going to use the process ID of 1)
Task 5
Next we will move to R2 and configure OSPF the output is:
Task 6
The last router (R3) is ready to be configured with OSPF (Again remember to use the process ID of 1)
Task 7
With OSPF setup you want to verify that you have full network connectivity (Every device should be able to ping each other) This is R1’s output of the command show ip route.
Task 8
This output of R2 when issuing the command show ip route also R2.
Task 9
This output of R3 when issuing the command show ip route also R3.
Task 10
Type the command show interface serial1/1 in R1 notice in the output the encapsulation type, which is HDLC.
This is the default encapsulation on serial interfaces with Cisco Routers.
To change the encapsulation from HDLC to PPP on R1, go to the interface of the serial connection and type encapsulation ppp.
Notice how OSPF is going down because of the different encapsulation. R2 is still running HDLC, therefore, the link is down.
Change R2 to the proper encapsulation type so communication between the routers are again connected and to get OSPF working again.
This example on R2 notice that once the encapsulation was changed to PPP the link went back up and OSPF found an adjacent neighbor.
Task 11
Now we can also give the encapsulation protocol (PPP) some authentication.
To set up PAP the username and password must match the other router. So for this example, R1’s username is R1 and the password is knowing.
And for R2, we have :
Task 12
Check the connectivity of 2 PCs.
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