... 1 - 4 CCNA 2: Routers and Routing Basics v 3.0 - Lab 3 .1. 4 Copyright 2003, Cisco Systems, Inc. Lab 3 .1. 4 Using Router show Commands Objective ... configuration output used in this lab is produced from 17 21 series routers. Any other router used may produce 2 - 4 CCNA 2: Routers and Routing Basics v 3.0 - Lab 3 .1. 4 Copyright 2003, Cisco Systems, ... 800, 16 00, 17 00, 2500 and 2600 routers, or a combination. Refer to the chart at the end of the lab to correctly identify the interface identifiers to be used based on the equipment in the lab. ...