| Lab 12.5.2 Routing loops setup challenge Estimated time: 30 min. Objectives: Configure a WAN connection between Lab-A and Lab-E. Demonstrate your ability to configure Serial interfaces. Background In this lab you will setup a WAN connection between Lab-A and Lab-E to create alternate paths in the standard router lab setup. Using a set of WAN serial cables, connect Lab-A Serial 1 to Lab-E Serial 0. Remember to set the clock rate on the DCE side of the cable (Lab-E's Serial 0 interface). Tools / Preparation: Prior to starting this lab you will need to have the equipment for the standard 5-router lab available (routers, hubs, switches, cables, etc.). The routers should be pre-configured by the instructor or lab assistant with the correct IP interface settings etc. The workstations should also be pre-configured to have the correct IP address settings prior to starting the lab. The routers, hubs and workstations should be labeled. This lab assumes that the equipment (routers, hubs, workstations, etc.) are assembled and connected in the standard lab topology. Work in teams of 3 or more. You may want to review Chapter 11 in the Cisco Networking Academy First-Year Companion Guide and review Semester 2 On-line Chapter 12. Resources Required: 5 PC workstations (min.) with Windows operating system and HyperTerminal installed. 5 Cisco Routers (model 1600 series or 2500 series with IOS 11.2 or later). 4 Ethernet hubs (10BASE-T with 4 to 8 ports). One Ethernet switch (Cisco Catalyst 1900 or comparable). 5 serial console cables to connect workstation to router console port (with RJ45 to DB9 converters). 4 Sets of V.35 WAN serial cables (DTE male/ DCE female) to connect from router to router. CAT5 Ethernet Cables wired straight through to connect routers and workstations to hubs and switches. AUI (DB15) to RJ45 Ethernet transceivers (Quantity depends on the number of routers with AUI ports) to convert router AUI interfaces to 10BASE-T RJ45. Websites Sites Required: Routing basics General information on routers 2500 series routers 1600 series routers Terms and acronyms IP routing protocol IOS command summary Notes: Step 1 - Verify that all physical connections are correct. Review the standard semester 2 Lab diagram in the overview section of this lab. You will add a 4th set of V.35 WAN serial cables (DTE male/ DCE female) to connect from router Lab-A interface S1 to router Lab-E interface S0. Step 2 - Configure Lab-A serial 1 interface. Login to the router and enter the interface configuration mode. Configure interface serial 1 with the following information (this is a new class C IP address): IP address 220.68.33.2 Subnet Mask 255.255.255.0 Bandwidth of 56 Step 3 - Configure IP host and RIP networks. After you have finished the configuration for the interface, you will need to add the 220.68.33.0 network with the network command to all 5 routers. Also, add the new IP address to the host table entry for routers Lab-A and Lab-E for name resolution to all routers. Step 4 - Configure Lab-E serial 0 interface. Repeat steps 2 and 3 for Lab-E interface serial 0 with the following information: IP address 220.68.33.1 Subnet Mask 255.255.255.0 Clock rate 56000 Bandwidth of 56 Step 5 - Test your setup. When you have configured Lab-A's and Lab-E's interfaces, check off the items in the list: Ping from all routers to 220.68.33.1 Ping from all routers to 220.68.2 2.2 Ping from all Workstations to 220.68.33.1 Ping from all Workstations to 220.68.33.2 Telnet from Lab-C to 220.68.33.1 Telnet from Lab-C to 220.68.33.2 Telnet from Workstation to 220.68.33.1 Telnet from Workstation to 220.68.33.2 Step 6 - Troubleshooting. If you were not able to finish step 5 then use your troubleshooting skills learned in previous labs to correct the problem. After you have successfully finished step 5 save the running configuration to the startup configuration for all routers.