Configure the Router with the CLI

To configure the router, including the routing protocols, router interfaces, network management, and user access, you must enter a separate mode called configuration mode. Do this by issuing the configure operational mode command.

In configuration mode, the command-line interface (CLI) provides commands to configure the router, load a text (ASCII) file that contains the router configuration, activate a configuration, and save the configuration to a text file.

This chapter discusses the following topics:

• Configuration Statement Hierarchy
• How the Configuration Is Stored
• Enter Configuration Mode
• Configuration Mode Prompt
• Configuration Mode Banner
• Configuration Statements and Identifiers
• Get Help about Configuration Mode Commands, Statements, and Identifiers
• Create and Modify the Configuration
• Move among Levels of the Hierarchy
• Exit Configuration Mode
• Display the Current Configuration
• Display Users Currently Editing the Configuration
• Remove a Statement from the Configuration
• Use Regular Expressions to Remove Related Configuration Items
• Copy a Statement in the Configuration
• Rename an Identifier
• Insert a New Identifier
• Run an Operational Mode CLI Command from Configuration Mode
• Display Configuration Mode Command History
• Verify a Configuration
• Commit a Configuration
• Synchronize Routing Engines
• Save a Configuration to a File
• Load a Configuration
• Return to a Previously Committed Configuration
• Return to the Rescue Configuration
• Configuration Mode Error Messages
• Deactivate and Reactivate Statements and Identifiers in a Configuration
• Add Comments in a Configuration
• Have Multiple Users Configure the Software
• Example: Use the CLI to Configure the Router
• Additional Details about Specifying Statements and Identifiers

For information about the configuration statements to use to configure particular system functionality, see the chapter about that feature.