Getting Started........................................................................................................................................ 9

About This Guide..................................................................................................................................................9

Audience .........................................................................................................................................................9

In This Chapter ...................................................................................................................................................10

Router System Configuration Process ...............................................................................................................10

CLI Usage .............................................................................................................................................. 11

In This Chapter ...................................................................................................................................................11

CLI Structure ......................................................................................................................................................11

Navigating in the CLI ..........................................................................................................................................15

CLI Contexts..................................................................................................................................................15

Basic CLI Commands....................................................................................................................................16

CLI Environment Commands ........................................................................................................................18

CLI Monitor Commands ................................................................................................................................19

Getting Help in the CLI .......................................................................................................................................20

The CLI Command Prompt.................................................................................................................................22

Displaying Configuration Contexts .....................................................................................................................23

EXEC Files .........................................................................................................................................................24

CLI Script Control ...............................................................................................................................................24

Entering CLI Commands ....................................................................................................................................25

Command Completion...................................................................................................................................25

Unordered and Unnamed Parameters ..........................................................................................................25

Editing Keystrokes.........................................................................................................................................26

Absolute Paths ..............................................................................................................................................27

History ...........................................................................................................................................................28

Entering Numerical Ranges ..........................................................................................................................29

Pipe/Match ....................................................................................................................................................31

Pipe/Count.....................................................................................................................................................34

Redirection ....................................................................................................................................................35

VI Editor..............................................................................................................................................................35

Summary of vi Commands ............................................................................................................................36

Using the vi Commands ................................................................................................................................36

EX Commands ..............................................................................................................................................42

Configuration Rollback .......................................................................................................................................43

Feature Behavior ...........................................................................................................................................44

Rollback and SNMP ......................................................................................................................................51

Rescue Configuration ....................................................................................................................................51

Operational Guidelines ..................................................................................................................................52

Transactional Configuration................................................................................................................................53

Basic Operation .............................................................................................................................................54

Transactions and Rollback ...........................................................................................................................56

Authorization .................................................................................................................................................56

Basic CLI Command Reference .........................................................................................................................57

Command Hierarchies...................................................................................................................................57

Basic CLI Commands ..............................................................................................................................58

Monitor Commands ..................................................................................................................................58

Basic System Configuration Guide