Lab 36:
RIPv2 Automatic Summarization
Lab Objective:
The objective of this lab exercise is for you to learn and understand automatic network summarization using Routing Information Protocol version 2 on a Cisco IOS router. By default, when RIP routing is enabled on for networks, it performs summarization at default network boundaries.
Lab Purpose:
RIPv2 configuration is a fundamental skill. By default, when RIP is enabled on a Cisco router, both version 1 and version 2 updates are sent and received. Since RIPv1 is considered obsolete because of today’s subnetted networks, it is imperative that you know how to enable RIPv2. Also, because of the VLSM employed in the networks of today, automatic summarization is a default feature that should not be used. As a Cisco engineer, as well as in the Cisco CCNA exam, you will be expected to know how to prevent automatic RIPv2 summarization.
Certification Level:
This lab is suitable for CCNA certification exam preparation
Lab Difficulty:
This lab has a difficulty rating of 10/10
Readiness Assessment:
When you are ready for your certification exam, you should complete this lab in no more than 30 minutes
Lab Topology:
Please use the following topology to complete this lab exercise:
Task 1:
Configure the hostnames on routers R1, R2, R3 and Sw1 as illustrated in the topology.
Task 2:
Configure VLAN 2 named RIPv2-VLAN on Sw2 and assign ports FastEthernet0/1 and FastEthernet0/2 to this VLAN as access ports. Configure FastEthernet0/0 in R2 with the IP address 192.168.2.2/27 and FastEthernet0/0 on R3 with the IP address 192.168.2.3/27. Verify your VLAN and interface configuration by using ping.
Task 3:
Configure a back-to-back Serial connection between R1 and R2. Configure the DCE interface Serial0/0 in R2 to provide clocking to R1 at a clock speed of 128Kbps. Configure a back-to-back Serial connection between R2 and R3. Configure the DCE interface Serial0/1 in R2 to provide clocking to R3 at a clock speed of 128Kbps. Configure the IP addresses between R1 and R2 Serial interfaces and R2 and R3 Serial interfaces as illustrated in the topology. Ping from R1 to R2 and vice versa as well as from R2 to R3 and vice versa to validate your configuration.
Task 4:
Configure both R1 and R3 with the Loopback interface specified in the lab topology
Task 5:
Enable RIPv2 on R1, R2 and R3 for all subnets configured on the routers. Verify that RIPv2 has been enabled using the appropriate commands.
Task 6:
Look at the routing tables of R1, R2 and R3 and see if the 10.10.100.0/27 and 10.10.101.0/26 routes from R1 are present (check on R2 and R3) as well as if the 10.30.100.0/29 and 10.30.101.0/25 routes from R3 are present (check on R1 and R2). If you have configured the network as required, you will notice that you do not see these subnets, but instead only see a 10.0.0.0/8 subnet in the routing table.
Task 7:
Based on your studies, you know that RIPv2 performs automatic summarization at Classful boundaries. Armed with this knowledge, disable this behavior on R1, R2, and R3. To reset the routing tables, issue the clear ip route * command on routers R1, R2, and R3.
Task 8:
Look at the routing tables of R2 and R3 and verify that the 10.10.100.0/27 and 10.10.101.0/26 routes from R1 are now present. Next, look at the routing table of R1 and R2 and verify that the 10.30.100.0/29 and 10.30.101.0/25 routes from R3 are now present.