E-Lab 7.3.6 - Configuring Default Routing with RIP and IGRP
In this lab, configure a default route and use RIP to propagate default route information to other routers.
When this configuration is working, migrate the network from RIP to IGRP. 
Default routing will be configured to work with IGRP protocol as well.
Step 1.1
Enter privileged EXEC mode.
Step 1.2
Enter into global configuration mode.
Step 1.3
Enter hostname Maputo.
Step 2.1
Enter line configuration mode for the console.
Step 2.2
Enter password for console as cisco.
Step 2.3
Use the command login.
Step 2.4
Exit to global configuration mode.
Step 3.1
Enter line configuration mode for virtual terminals 0 through 4.
Step 3.2
Enter password for virtual terminal cisco.
Step 3.3
Use the command login.
Step 3.4
Exit to global configuration mode.
Step 4
Set enable secret password to cisco
Step 5.1
Enter router configuration mode for RIP.
Step 5.2
Add network address 192.168.2.0.
Step 5.3
Add network address 192.168.3.0.
Step 5.4
Use the command end to exit into privileged EXEC mode.
Step 6
Enter global configuration mode.
Step 7.1
Enter interface configuration mode for serial 0/0.
Step 7.2
Configure the IP address for Serial 0/0 as 192.168.1.2 255.255.255.0.
Step 7.3
Set the clockrate to 56000.
Step 7.4
Bring the interface up.
Step 7.5
Use the command end to exit into privileged EXEC mode.
Step 8
Save your configuration.
Step 9.1
Enter privileged EXEC mode for the router Antananarivo.
Step 9.2
Enter global configuration mode.
Step 9.3
Enter hostname Antananarivo.
Step 10.1
Configure the console.
Step 10.2
Enter password for console as cisco.
Step 10.3
Use the command login.
Step 10.4
Exit to global configuration mode.
Step 11.1
Configure virtual terminal.
Step 11.2
Enter password for virtual terminal cisco.
Step 11.3
Use the command login.
Step 11.4
Exit to global configuration mode.
Step 12
Set enable secret password to cisco.
Step 13
Next, configure Antananarivo with a 0.0.0.0/0 default route pointed at the simulated ISP.
Use the command ip route 0.0.0.0 0.0.0.0 loopback0.
Step 14.1
Enter router config mode for Antananarivo using RIP.
Step 14.2
Add network address 192.168.2.0.
Step 14.3
Exit into global configuration mode.
Step 15.1
Enter the interface configuration mode for loopback 0.
Step 15.2
Configure the IP address as 172.16.1.1 255.255.0.0.
Step 15.3
Type exit to return to global configuration mode.
Step 16.1
Enter interface configuration mode for serial 0/0.
Step 16.2
Configure the IP address for Serial 0 as 192.168.2.2 255.255.255.0.
Step 16.3
Bring the interface up.
Step 16.4
Use the command end to exit into privileged EXEC mode.
Step 17
Save your configuration.
Step 18.1
Enter privileged EXEC mode for the router Port-Louis.
Step 18.2
Enter global configuration mode.
Step 18.3
Enter hostname Port-Louis.
Step 19.1
Enter line configuration mode for the console.
Step 19.2
Enter password for console as cisco.
Step 19.3
Use the command login.
Step 19.4
Exit to global config mode.
Step 20.1
Configure virtual terminal.
Step 20.2
Enter password for virtual terminal cisco.
Step 20.3
Use the command login.
Step 20.4
Exit to global config mode.
Step 21
Set enable secret password to cisco.
Step 22.1
Enter router config mode for Port-Louis using RIP.
Step 22.2
Add network address 192.168.1.0.
Step 22.3
Add network address 192.168.2.0.
Step 22.4
Exit into global configuration mode.
Step 23.1
Enter interface configuration mode for serial 0/0.
Step 23.2
Configure the IP address for Serial 0 as 192.168.1.2 255.255.255.0.
Step 23.3
Set the clockrate to 56000.
Step 23.4
Bring the interface up.
Step 23.5
Use the command end to exit into privileged EXEC mode.
Step 24
Save your configuration.
Step 25.1
Check the routing table of Maputo.
Step 25.2
Check the routing table of Antananarivo.
Step 26.1
With default routing now working, you must migrate the network from RIP to IGRP for testing purposes.
Issue the 'no router rip' command.
Step 26.2
Issue the no router rip command for Antananarivo.
Step 26.3
Issue the no router rip command for Port-Louis.
Step 27.1
With RIP removed from each router's configuration, configure IGRP using AS 24.
Step 27.2
Enter the information for network 192.168.1.0.
Step 27.3
Enter the information for network 192.168.2.0.
Step 27.4
Exit from router configuration mode.
Step 28.1
With RIP removed from each router's configuration, configure IGRP using AS 24 for Antananarivo.
Step 28.2
Enter the information for network 192.168.2.0.
Step 28.3
Exit out of router configuration mode.
Step 29.1
With RIP removed from each router's configuration, configure IGRP using AS 24 for Maputo.
Step 29.2
Enter the information for network 192.168.1.0.
Step 29.3
If you were to check the routing table on Antananarivo, the static default route to 0.0.0.0/0 would still be there.
To propogate this route with RIP, the default-information originate command was used.
However, the default-information originate command is not available in an IGRP configuration.
Thus, you must use a different method to propogate default information in IGRP.
First, type exit from Maputo, then the console will switch to Antananarivo.
Step 30
Next you will issue the ip default-network 192.168.0.0 command.
This command configures IGRP to update its neighbor routers about the network 172.16.0.0, which includes the simulated ISP link (loopback 0).
Not only will IGRP advertise this network, but the ip default-network command also will flag this network as a candidate default route (denoted by an asterisk in the routing table). 
When a network is flagged as a default, that flag stays with the route as it passed from neighbor to neighbor by IGRP.
Step 31
Exit into privileged EXEC mode.
Step 32.1
Issue the ip router command to check the routing table.
Step 32.2
Issue the show ip router command to check the routing table.
Step 32.3
Issue the ip router command to check the routing table.
Step 33
Enter into global configuration mode.
Step 34.1
In order to test the default-route to the ISP, you must create a Loopback address on Port-Louis.
Enter into interface configuration mode for loopback 1.
Step 34.2
Use the ip address 10.0.0.1 255.0.0.0 for loopback1.
Step 34.3
Use the command end to exit into privileged EXEC mode.
Step 35
From Maputo, ping to the ISP.