MODES OF CISCO IOS

MODES OF CISCO IOS

User Mode

• User mode has limited access to the device.
• To Enter into Privilege mode
• Switch>enable
• To disable Privilege and enter to User mode,
• Switch#disable

Privilege Mode

• In This mode you will gain more access to the device.
• In this mode you can use show commands to verify the configuration.
• Switch# show ip interface brief
• Switch# show interface serial 0/0
• Switch# show history
• By default it cisco device will show the history of last 10 commands, But you can also change it by,
• Switch# terminal history size 25
• Some of the configuration that can be done in Privilege mode
• Switch# clock set 14:51:50 25 January 2013
•  Swich# show version -- To check the uptime , 
•  Swich# show ip interface brief -- Status of the interface
•  Swich# show interface serial 0/0  -- Shows what type of interface and its configuration        characteristics.

Global Configuration mode

• This is the mode from where we can start doing configuration.
• Switch(config)#show interface f 0/0
• Switch(config)# ^
•     ---- If you type the above command it will show as, error with “^” , as this command is not    supported.
• Switch(config)# do show interface f 0/0
• Just add do infront of the command, It will display the information you required.

Interface configuration mode

•  In this mode we can configure interface.
• Switch(config)# interface serial 0/0
• Switch(config-if)# 

Sub-Interface configuration mode

• In this mode we can configure sub-interface.
• Switch(config)# interface serial 0/0
•  Switch(config-if)#interface serial 0/0.10
•  Switch(config-if)#

Line configuration mode

• In this mode we can configure, console and remote session characteristics as,
• What type of password to be used.
• What is the session time out
• SSH or telnet what is to be used.
• How many sessions to be allowed.
• The following command shows us how to enter to the line configuration mode.
• Switch(config)line vty 0 4
• Switch(config-line)#

Common Characteristics

• You can press the TAB button to auto-complete a command or keyword
• CTRL-A --> brings your cursor to the beginning of the line.
• CTRL-E --> brings your cursors to the end of the line.
• CTRL-W --> deletes the previous word of the cursor.
• CTRL-SHIFT-6 --> interrupts processes like a PING.
• CTRL-C --> aborts the current command that you were typing and exits configuration mode.
• CTRL-Z  --> ends configuration mode
• write --> to save the configuration.
• copy running-config startup-config --> to save the configuration.

That's it

You can also Look into my Video Tutorial
Different Modes of Cisco IOS in Plain English

Different Modes of Cisco IOS in Tamil