4000 Router Series Fundamentals Configuration Guide

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Table 4 Comparison between the two types of command history buffers

Item Command history buffer for a user line

Command history buffer for all

user lines

What kind of

commands are stored

in the buffer?

Commands successfully executed by the

current user of the user line.

Commands successfully executed by

all login users.

Cleared when the user

logs out?

Yes. No.

How to view buffered

commands?

Use the display history-command command.

Use the display history-command all

command.

How to call buffered

commands?

• In Windows 200x or Windows XP

HyperTerminal or Telnet, use the up or

down arrow key (↑ or ↓) to navigate to a

command in the buffer and press Enter to

execute the command again.

• In Windows 9x HyperTerminal, use Ctrl+P

and Ctrl+N to do so.

You cannot call buffered commands.

How to set the buffer

size?

Use the history-command max-size

size-value command in user line view to set

the buffer size.

By default, the buffer can store up to 10

commands.

You cannot set the buffer size.

By default, the buffer can store up to

1024 commands.

How to disable the

buffer?

Setting the buffer size to 0 disables the

buffer.

You cannot disable the buffer.

The system follows these rules when buffering commands:

• Buffering a command in the exact format in which the command was entered. For example, if you

enter an incomplete command, the buffered command is also incomplete. If you enter a command

with a command keyword alias, the buffered command also uses the alias.

• If you enter a command in the same format multiple times in succession, the system buffers the

command only once. If you enter a command in different formats multiple times, the system buffers

each command format. For example, display cu and display current-configuration are buffered as

two entries but successive repetitions of display cu create only one entry.

• To buffer a new command when a buffer is full, the system deletes the oldest command entry in the

buffer.

Controlling the CLI output

This section describes the CLI output control features that help you identify the desired output.

Pausing between screens of output

The system automatically pauses after displaying a screen if the output is too long to fit on one screen.

You can use the keys described in "Output controlling keys" to displa

y more information or stop the

display.