I developed these scenarios during my own preparation for the CCIE laboratory exam. The first scenario is designed to demonstrate how to configure a LAT service and use both one and two step LAT translation. The second scenario is a complex IRB scenario requiring the reader to troubleshoot numerous routers and illustrates a number of key issues one might encounter when configuring both transparent bridging and IRB. | CertificationZone Page 1 of 14 Date of Issue 01-01-2000 Bridging Lab Scenarios by David Wolsefer Introduction Scenario 1 - A LAT Challenge Equipment The Setup Objectives Solution R4 s Configuration R6 s Final Configuration Scenario 2 - Troubleshooting IRB Equipment Objectives The Setup R1 R2 R3 R4 Hints Bugs Revealed Solution R2 Final Configuration R3 Final Configuration R4 Final Configuration R1 Final Configuration Introduction I developed these scenarios during my own preparation for the CCIE laboratory exam. The first scenario is designed to demonstrate how to configure a LAT service and use both one and two step LAT translation. The second scenario is a complex IRB scenario requiring the reader to troubleshoot numerous routers and illustrates a number of key issues one might encounter when configuring both transparent bridging and IRB. Scenario 1 - A LAT Challenge Equipment This scenario requires 3 routers and the proper version of IOS. I suggest you use Enterprise or Enterprise Plus IOS. The actual routers I used were a 2511 for R1 a 2513 for R4 and a 2524 for R6. The Setup R6 E0 LAT Challenge Setup E0 Enable LAT http studyguides s. Issue 5 IssueDate 01-01-2000 CP 11 06 01 CertificationZone Page 2 of 14 Objectives Disable IP routing on R6 and remove all IP addresses from R6. Enable LAT on the E0 interface of R6 and configure a LAT service named CCIE. Verify using appropriate debug and show commands. Configure R4 to translate the address to the LAT CciE service. Verify one-step translation by Telnetting to from R1. If the translation is configured correctly you will find yourself at R6 as seen below r1 Trying . Open Trying Notice that you in effect Telnetted to R4 where one-step translation LATed you to R6. Now try two-step translation. Telnet into R4 and then LAT to CCIE as shown below r4 lat CCIE Trying r6 Solution R4 s Configuration Current configuration version .
