Cisco Systems CCNA 2 manual Configure a Router, CLI command modes

3.1 Configure a Router

Essential Labs:	3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, and 3.1.7
Optional Labs:	None
Core TIs:	All
Optional TIs:	none

Course-Level Claim: Students can perform, save, and test an initial configuration on a router.

Certification Level Claim: Students can perform an initial configuration on a router.

Hands-on skills: none

3.1.1 CLI command modes

The students need to understand that the router does not know what routing to do until it is configured. This section will help students begin the configuration of a router.

To gain access to a router, a login is required. After login, there is a choice of modes. The modes interpret the commands that are typed and perform the operations. There are two EXEC modes:

•User EXEC mode

•Privileged EXEC mode

The first configuration mode is referred to as global configuration mode or global config. The following configuration modes are available in global configuration mode:

•Interface

•Subinterface

•Controller

•Map-list

•Map-class

•Line

•Router

Global configuration commands are used in a router to apply configuration statements that affect the entire system. Use the privileged EXEC command configure terminal to enter global configuration mode.

Explain that Cisco IOS is modal. Emphasize that in the CLI that there are different modes to accomplish different tasks. There are several advantages to this. One is that the commands are generally shorter because the object of the mode, i.e., the interface, or routing protocol, to

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