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Archives for August 2013

Navigating IOS CLI Like a Ninja

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I’m always looking for ways to be more efficient with my work. And when little things like this come my way, I be sure to memorize it and share it.

Here are different keystrokes to help you move around in the Cisco IOS Command Line.

CTRL-A

Moves the cursor to the beginning of the line

CTRL-E

Moves the cursor to the end of the line

Esc B

Moves the cursor back one word.

Esc F

Moves the cursor forward one word.

CTRL-K

Deletes all characters from the cursor to the end of the line.

CTRL-U

Deletes all characters from the cursor to the beginning of the line.

CTRL-W

Deletes the word left of the cursor.

Esc D

Deletes from the cursor to the end of the word.

Esc U

Capatilizes letters from the cursor to the end of the word.

CTRL-L

Redisplay the current command line if you get a message on the screen.

Various Cisco Command Modes

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When working in CLI there are different modes you can work in. Depending on the mode, you will have specific commands available to you.

User Exec

SDG-SWITCH>

This is the mode you begin with when you start a session using Telnet, SSH, or consoled into the switch.

There are only a subset of commands available in this mode.

Privileged Exec

SDG-SWITCH#

In privileged exec mode, you have access to all the commands. Usually you will enter a password to get into privileged exec mode.

To make any changes you actually need to move into configuration mode.

Configuration Modes

Global Config

SDG-SWITCH(config)#

In global configuration mode you can make global modifications to the switch. For example, some commands are saving the config, rebooting the switch, changing spanning-tree modes.

Commands used in this mode apply to the whole switch.

VLAN Config

SDG-SWITCH(config-vlan)#

This is another configuration mode specifically for configuring VLANs. Pretty straight forward.

Interface Config

SDG-SWITCH(config-if)#

This is the configuration mode to make changes to any of the ports on the switch. Again, straight forward.

Line Config

SDG-SWITCH(config-line)#

Here’s the mode where you configure specific lines. An example to get into this config mode is to issue the line vty command.