This lab helps the student become familiar with the router show commands. The show commands are the most important information-gathering commands available for the router. • show running-config (or show run) is probably the single most valuable command to help determine the current status of a router, because it displays the active configuration file running in RAM. • show startup-config (or show start) displays the backup configuration file that is stored in non-volatile RAM (NVRAM). This is the file that will be used to configure the router when it is first started or rebooted with the reload command. All the detailed router interface settings are contained in this. | Cisco SrsTEMS Lab Using Router show Commands Straight-through cable Serial cable __ Console Rollover . Crossover cable Objective Become familiar with the basic router show commands. Retrieve the current running configuration from RAM using show running-config. View the backup configuration file in NVRAM using show startup-config. View the IOS file information using show flash and show version. View the current status of the router interfaces using show interface. View the status of any configured Layer 3 protocol using show protocol. Background Preparation This lab helps the student become familiar with the router show commands. The show commands are the most important information-gathering commands available for the router. show running-config or show run is probably the single most valuable command to help determine the current status of a router because it displays the active configuration file running in RAM. show startup-config or show start displays the backup configuration file that is stored in non-volatile RAM NVRAM . This is the file that will be used to configure the router when it is first started or rebooted with the reload command. All the detailed router interface settings are contained in this file. show flash is used to view the available flash memory and the amount used. Flash is where the Cisco Internetwork Operating System IOS file or image is stored. 1 - 4 CCNA 2 Routers and Routing Basics v - Lab Copyright 2003 Cisco Systems Inc. show arp displays the router IP to MAC to interface address mapping. show interface displays statistics for all interfaces configured on the router. show protocol displays global and interface-specific status of configured Layer 3 protocols IP IPX etc. . Any router that meets the interface requirements may be used. Possible routers include 800 1600 1700 2500 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
