Configure descriptions

Adding a description to an interface on a Cisco device doesn’t provide any extra functionality, but it is useful for administrative purposes, since it will help you to remember the interface function. A description of an interface is locally significant and can Read More …

show command

We’ve already mentioned a couple of show commands in the previous sections, so you should already we somewhat aware of this command. This command is used to display the device’s configuration, statistics, command history, interface status… The show command is invoked Read More …

IOS basic commands

In this article we will go through some basic IOS commands. Hostname command The hostname command is used to configure the device hostname. Because this command changes a device configuration, it must be entered in the global configuration mode. After Read More …

Running & startup configuration

CIsco devices store commands in two configuration files: startup configuration running configuration   Immediately after you type a command in the global configuration mode, it will be stored in the running configuration. A running configuration resides in a device’s RAM, Read More …

Get help in IOS

You can use the question mark to display a list of commands available in the prompt you are in: If the output spans more than one page, press the spacebar to display the following page of commands, or press Enter Read More …

IOS command modes

We’ve already learned that IOS has three main command modes: the user exec, privileged exec, and the global configuration modes. Each of these modes serves a different purpose and has its own set of commands. In this lesson we will Read More …

Power on a Cisco device

When you first power-on a newly purchashed Cisco device, it will perform a power-on self-test (POST) to discover the hardware components and verify that all components work properly. If the POST is successful, the device will enter the setup mode. Read More …

Cisco IOS overview

IOS (Internetwork Operating System) is a multitasking operating system used on most Cisco routers and switches. IOS has a command-line interface with the predetermined number of multiple-word commands. This operating system is used to configure routing, switching, internetworking and other Read More …