E
NTERING
C
OMMANDS
18-7Using Command History
The CLI maintains a history of commands that have been entered. You
can scroll back through the history of commands by pressing the up arrow
key. Any command displayed in the history list can be executed again, or
first modified and then executed.
Using the show history command displays a longer list of recently
executed commands.
Understanding Command Modes
The command set is divided into Exec and Configuration classes. Exec
commands generally display information on system status or clear
statistical counters. Configuration commands, on the other hand, modify
interface parameters or enable certain switching functions. These classes
are further divided into different modes. Available commands depend on
the selected mode. You can always enter a question mark “?” at the prompt
to display a list of the commands available for the current mode. The
command classes and associated modes are displayed in the following
table:
Table 18-1 General Command Modes
Class Mode
Exec Normal, Privileged
Configuration Global*
* You must be in Privileged Exec mode to access the Global configuration
mode. You must be in Global Configuration mode to access any of the other
configuration modes.
Access Control List
Class Map
IGMP Profile
Interface
Line
Multiple Spanning Tree
Policy Map
VLAN Database
VDSL Line Profile
VDSL Alarm Profile