... Routers and Routing Basics v 3. 0 - Lab 9. 2 .6 Copyright 20 03, Cisco Systems, Inc. Lab 9. 2 .6 Troubleshooting Using Ping and Telnet Objective • Use knowledge of OSI Layers 1, 2 and 3 to diagnose ... at the end of this lab. Perform those steps on all routers in this lab assignment before continuing. 2 - 4 CCNA 2: Routers and Routing Basics v 3. 0 - Lab 9. 2 .6 Copyright 20 03, Cisco Systems, ... Press Enter. The router is ready for the assigned lab to be performed. 4 - 4 CCNA 2: Routers and Routing Basics v 3. 0 - Lab 9. 2 .6 Copyright 20 03, Cisco Systems, Inc. Router Interface Summary...