ccna training pdf

ccna training pdf.(config-controller)# controller sub-configuration mode(config-router)# IP routing protocol subconfiguration modePractical Experience Not all IOS devices support all sub-configuration modes. In subconfiguration mode, the commands entered affect only specific components of the router or switch. To exit subconfiguration mode and return to global configuration mode, use the command exit. use the command end or press CTRL-Z to always return to privileged EXEC mode, regardless of which configuration mode you are currently in. The following is an example of returning from subcommand mode to global configuration mode.IOS(config)# line con 0 IOS(config-line)# exit IOS(config)#In many cases, when you enter a global configuration mode command in sub-configuration mode, IOS will execute the command and return to global configuration mode, as shown below.IOS(config)# line con 0 IOS(config-line)# hostname 2960 2960(config)#Don't forget that many global configuration mode commands can usually be executed in any configuration mode: global configuration mode and sub-configuration mode. These commands affect the entire IOS device, such as the command hostname: enter this command only once and it will affect the entire device. Sub-configuration mode commands affect only specific components of the IOS device, such as interfaces, lines, routing protocols, etc. To return to the previous level of configuration mode, use the command exit; to exit configuration mode, use the command end or press CTRL-Z ONote that when the command hostname is executed in line subconfiguration mode, the switch modifies its name and mode. Sometimes, the router displays a message indicating that the command is invalid; in this case, you must exit subconfiguration mode and execute the global command again.Video 10.06 In the companion digital resource to this book, which includes using configuration mode and subconfiguration mode on IOS devices10.4.4 Line Configuration