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ICND1 break down -- Router Configuration Modes



The Cisco IOS offers 16 different privilege levels. There are two configuration Modes system administrators used frequently:

User EXEC Mode -- privilege level 1.

Privilege (or Enable) EXEC Mode -- privilege level 15.

After logging to Cisco router, the default Mode is User EXEC Mode, you can view some router status (typing "show ?" to view available commands), but you can't make any changes or view the running configuration file.

Router>

By default, typing enable takes you to level 15, privileged EXEC mode, where you have full access to the router.

Router#

To return to user EXEC mode from the privileged EXEC mode, use command "disable".

Typing "config terminal" takes you to Global configuration Mode, where you can typing "enable password password" to establishe a new password or change an existing password for the privileged EXEC mode. You can also typing "service password-encryption " to encripts password.

Router(config)#

Typing "interface interface" (typing "interface ?" to view avilable interface types) takes you to Interface Configuration Mode, where you can configure a specific interface.

To exit modes, use commands "exit", "disable" or "logout".

  • To exit interface configuration mode type exit.  This will return the system to global configuration mode.

  • To exit global configuration mode type exit.  This will return the system to privileged Exec mode.

  • To exit global configuration mode type disable.  This will return the system to user Exec mode.

  • To exit privileged EXEC mode type disable. This will return the system to user EXEC mode.

  • To exit user Exec mode type logout.  This will end the session.

If you enter a major command on a Cisco router, the router switches you from one configuration mode to another. There are many configuration mode, for example:

Controller config mode:

Router(config-controller)#

Router config mode:

Router(config-router)#

Line config mode:

Router(config-line)#

Interface config mode:

Router(config-if)#

Subinterface config mode:

Router(config-subif)#

For detail, check the cisco documentation.

ICND1 and ICND2 break down

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