8.4.1 Lab – Investigating the Routing Table Lookup Process Answers
Topology
Addressing Scheme:
| Device | Interface | IP Address | Subnet Mask | Default Gateway |
|---|---|---|---|---|
| R1 | Fa0/0 | 172.16.1.1 | 255.255.255.0 | N/A |
| S0/0/0 | 172.16.2.1 | 255.255.255.0 | N/A | |
| R2 | Fa0/0 | 172.16.3.1 | 255.255.255.0 | N/A |
| S0/0/0 | 172.16.2.2 | 255.255.255.0 | N/A | |
| S0/0/1 | 192.168.1.1 | 255.255.255.0 | N/A | |
| R3 | Fa0/0 | 172.16.4.1 | 255.255.255.0 | N/A |
| S0/0/1 | 192.168.1.2 | 255.255.255.0 | N/A | |
| PC1 | NIC | 172.16.1.10 | 255.255.255.0 | 172.16.1.1 |
| PC2 | NIC | 172.16.3.10 | 255.255.255.0 | 172.16.3.1 |
| PC3 | NIC | 172.16.4.10 | 255.255.255.0 | 172.16.4.1 |
Learning Objectives:
- Perform basic configuration tasks on a router.
- Determine level 1 and level 2 routes.
- Modify the configuration to reflect static and default routing.
- Enable classful routing and investigate classful routing behavior.
- Enable classless routing and investigate classless routing behavior.
Task 1: Basic router configurations.
Perform basic configuration of the R1, R2, and R3 routers according to the following guidelines:
- Configure the router hostname.
- Disable DNS lookup.
- Configure an EXEC mode password .
- Configure a message-of-the-day banner.
- Configure a password for console connections.
- Configure a password for VTY connections.
Task 2: Configure and activate serial and ethernet addresses.
Step 1 Configure the interfaces on the R1, R2, and R3 routers with the IP addresses from the table under the Topology Diagram. Use the show ip interface brief command to verify that the IP addressing is correct. When you have finished, be sure to save the running configuration to the NVRAM of the router.
Step 2 Configure the Ethernet interfaces of PC1, PC2, and PC3 with the IP addresses and default gateways from the table under the Topology Diagram.
Task 3: Configure RIP.
Step 1 Configure RIP version 1 routing on each of the routers. Include network statements for each of the directly connected networks.
Task 4: Observe routes being deleted and added to the routing table.
Step 1 View the routing table on the router R1.
Step 2 Use the debug ip routing command to observe changes in the routing table as they occur on router R1.
Step 3 Shut down the Serial0/0/0 interface and observe the debug output.
Step 4 View the routing table on the R1 router and observe the changes that occurred when the Serial0/0/0 interface was disabled.
Step 5 Enable the Serial0/0/0 interface and observe the debug output.
Task 5: Determine level 1 and level 2 routes.
Step 1 Compare and contrast level 1 and level 2 routes.
Step 2 Examine the routing table of all three routers and answer the following questions on a separate piece of paper:
- Which of these routes are level 1 routes?
- Why are these routes level 1 routes?
- Are any of the level 1 routes ultimate routes?
- Why is this route an ultimate route?
- Are any of the level 1 routes parent routes?
- Why is this route a level 1 parent route?
- Which of the routes are level 2 routes?
- Why are these routes level 2 routes?
