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The ? Key

Use the ? key at any time to see all the choices you can enter next. For example:



host1(config)#router ?

bgpConfigure the Border-Gateway Protocol (BGP)
isisConfigure ISO IS-IS
ospfConfigure the Open Shortest Path First protocol (OSPF)
ripConfigure the Routing Information Protocol
host1(config)#router

When you enter the ? character, all available choices are displayed. The router again displays the command you typed. You then have to type in only the choice you want and press Enter.

A <cr> in the list of choices means that you can press Enter to execute the command. For example:



host1(config-if)#isis metric 40 level-2 ? 

  <cr>

host1(config-if)#isis metric 40 level-2

Note: If the list of options extends beyond one screen, the last line on your screen displays the --More-- prompt. If you want to use the ? character as part of a string, such as a hostname or a regular expression, you must enter the following key sequence: Ctrl+v+?. Otherwise, the CLI considers the ? to be a request for assistance in completing the command.

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