video demonstration of IOS CLI Primary Command Modes

IOS CLI Primary Command Modes

The IOS CLI (Command Line Interface) on Cisco devices provides several primary command modes, each with a specific set of commands and functionality. These modes are:

1. User EXEC mode: This is the default mode you enter when you first connect to a Cisco device. In this mode, you can only run a limited set of commands, such as basic monitoring commands and show commands. The prompt for user EXEC mode is typically a ">" symbol.

2. Privileged EXEC mode: To access more advanced configuration and troubleshooting commands, you need to enter privileged EXEC mode. This mode is indicated by a "#" symbol at the end of the prompt. You can enter privileged EXEC mode by using the "enable" command and providing the correct password.

3. Global configuration mode: This mode allows you to configure global parameters on the device, such as hostname, domain name, and interfaces. To enter this mode, you use the "configure terminal" command from privileged EXEC mode. The prompt for global configuration mode is typically "(config)#".

4. Interface configuration mode: Once you have entered global configuration mode, you can then configure individual interfaces using interface configuration mode. You can enter this mode by specifying the interface you want to configure (e.g. "interface gigabitethernet0/1") and then using the "interface" command. The prompt for interface configuration mode typically shows the interface type and number, followed by "(config-if)#".

5. Line configuration mode: This mode is used to configure settings for specific lines, such as console or telnet lines. To enter line configuration mode, you use the "line" command from global configuration mode. The prompt for line configuration mode typically shows the line type and number, followed by "(config-line)#".

6. Router configuration mode: This mode is used specifically for configuring routing protocols on a Cisco router. To enter router configuration mode, you use the "router" command from global configuration mode, followed by the routing protocol you want to configure (e.g. "router ospf 1"). The prompt for router configuration mode typically shows the name of the routing protocol, followed by "(config-router)#".

Each of these primary command modes provides a different level of functionality and access to the configuration and monitoring commands available on a Cisco device. By understanding these modes and how to navigate between them, you can effectively manage and troubleshoot your Cisco network.

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