Cisco DSLAM User Interface

This chapter describes the Cisco DSLAM user interface and provides instructions for using the command-line interface. This chapter includes the following sections:

User Interface Overview

The Cisco DSLAM user interface provides access to several different command modes, each with related commands. For security, the user interface provides three levels of command access:

User mode—Called user EXEC mode
Privileged mode— The privileged mode is called privileged EXEC mode and requires a password. The unprivileged user mode is called user EXEC mode.

Note Because all commands available in user EXEC mode are also available in privileged EXEC mode, user EXEC mode is referred to as EXEC mode in this guide.

From the privileged level, you can access global configuration mode and three specific configuration modes:

Terminal
Memory
Network configuration

Read-only memory (ROM) monitor mode—This mode accesses a basic system kernel to which the DSLAM may default at startup if it does not find a valid system image, or if its configuration file is corrupted.

You can enter commands in uppercase, lowercase, or both. Only passwords are case sensitive. You can abbreviate commands and keywords to a specific number of characters. For example, you can abbreviate the show command to sh. After you enter the command line at the system prompt, press Return to execute the command.

Most configuration commands have a no form. In general:

Use the no form to disable a feature or function
Use the command without the no keyword to reenable a disabled feature or enable a feature disabled by default

The context-sensitive help system allows you to obtain a list of commands available for each command mode or a list of available options for a specific command by entering a question mark (?). This chapter describes how to use the help system and also describes the command editing and command history features that enable you to recall previous command entries and edit previously entered commands.

Accessing Command Modes

This section describes how to access the DSLAM command modes. Table 1-1 lists

The command modes
Access to each mode, the prompt you see while in that mode
The main uses for each mode
The method to exit that mode
The prompts listed use the default node name DSLAM

Note Table 1-1 does not include all of the possible ways to access or exit each command mode.

Table 1-1: Commmand Modes

Command Mode Access Method Prompt Exit Method

EXEC (user)

Log in to the switch or DSLAM.

DSLAM>

Use the logout command.

Privileged EXEC

From user EXEC mode, use the enable EXEC command and enter your password.

DSLAM#

To return to user EXEC mode, use the disable command.

ROM monitor

From privileged EXEC mode, use the reload EXEC command. Press Break during the first 60 seconds while the system boots.

>

To exit to user EXEC mode, use the continue command.

Global configuration

From privileged EXEC mode, use the configure privileged EXEC command. Use the keyword terminal to enter commands from your terminal.

DSLAM(config)#

To exit to privileged EXEC mode, use the exit or end command or press Ctrl-Z.

Interface configuration

From global configuration mode, enter by specifying an interface with the interface command.

DSLAM(config-if)#

To exit to global configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

Profile configuration

From interface configuration, enter by specifying a profile with a dsl profile command.

DSLAM(config-dsl-prof)#

To exit to global configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

Map-list configuration

From global configuration mode, define a map list with the map-list command.

DSLAM(config-map-list)#

To exit to global configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

ATM router configuration

From global configuration mode, configure the ATM router configuration with the atm router pnni command.

DSLAM(config-atm-router)#

To exit to global configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

PNNI node configuration

From ATM router configuration mode, configure the PNNI routing node with the node command.

DSLAM(config-pnni-node)#

To exit to ATM router configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

ATM accounting file

From global configuration mode, define an ATM accounting file with the atm accounting file command.

DSLAM(config-acct-file)#

To exit to global configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

ATM accounting selection

From global configuration mode, define an ATM accounting selection table entry with the atm accounting selection command.

DSLAM(config-acct-sel)#

To exit to global configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

ATM E.164 translation table configuration

From global configuration mode, enter the atm e164 translation-table command

DSLAM(config-atm-e164)

To exit to global configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

ATM signaling diagnostics configuration

From global configuration mode, enter the command atm signalling diagnostics and an index to configure.

DSLAM(cfg-atmsig-diag)

To exit to global configuration mode, use the exit command.

To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

Command Mode	Access Method	Prompt	Exit Method
EXEC (user)	Log in to the switch or DSLAM.	`DSLAM>`	Use the logout command.
Privileged EXEC	From user EXEC mode, use the enable EXEC command and enter your password.	`DSLAM#`	To return to user EXEC mode, use the disable command.
ROM monitor	From privileged EXEC mode, use the reload EXEC command. Press Break during the first 60 seconds while the system boots.	`>`	To exit to user EXEC mode, use the continue command.
Global configuration	From privileged EXEC mode, use the configure privileged EXEC command. Use the keyword terminal to enter commands from your terminal.	`DSLAM(config)#`	To exit to privileged EXEC mode, use the exit or end command or press Ctrl-Z.
Interface configuration	From global configuration mode, enter by specifying an interface with the interface command.	`DSLAM(config-if)#`	To exit to global configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.
Profile configuration	From interface configuration, enter by specifying a profile with a dsl profile command.	`DSLAM(config-dsl-prof)#`	To exit to global configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.
Map-list configuration	From global configuration mode, define a map list with the map-list command.	`DSLAM(config-map-list)#`	To exit to global configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.
ATM router configuration	From global configuration mode, configure the ATM router configuration with the atm router pnni command.	`DSLAM(config-atm-router)#`	To exit to global configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.
PNNI node configuration	From ATM router configuration mode, configure the PNNI routing node with the node command.	`DSLAM(config-pnni-node)#`	To exit to ATM router configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.
ATM accounting file	From global configuration mode, define an ATM accounting file with the atm accounting file command.	`DSLAM(config-acct-file)#`	To exit to global configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.
ATM accounting selection	From global configuration mode, define an ATM accounting selection table entry with the atm accounting selection command.	`DSLAM(config-acct-sel)#`	To exit to global configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.
ATM E.164 translation table configuration	From global configuration mode, enter the atm e164 translation-table command	`DSLAM(config-atm-e164)`	To exit to global configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.
ATM signaling diagnostics configuration	From global configuration mode, enter the command atm signalling diagnostics and an index to configure.	`DSLAM(cfg-atmsig-diag)`	To exit to global configuration mode, use the exit command. To exit directly to privileged EXEC mode, use the end command or press Ctrl-Z.

Command Modes

The following section describes the various command modes and their levels of user access.

User EXEC Mode

When you log in to the DSLAM, you are in user EXEC, or simply EXEC, command mode. The EXEC commands available at the user level are a subset of those available at the privileged level. In general, the user-level EXEC commands allow you to connect to remote switches, change terminal settings on a temporary basis, perform basic tests, and list system information.

The user-level prompt consists of the DSLAM's host name followed by the angle bracket (>):

Frodo>

DSLAM>

The default host name is DSLAM, unless it has been changed using the host name global configuration command.

Privileged EXEC Mode

The privileged EXEC command set includes all user-level EXEC mode commands and the configure command, through which you can access global configuration mode and the remaining configuration submodes. Privileged EXEC mode also includes high-level testing commands, such as debug, and commands that display potentially secure information.

To enter privileged EXEC mode from EXEC mode, use the enable command and enter your password. The prompt changes to the DSLAM's host name followed by the pound sign (#):

DSLAM> enable
Password:
DSLAM#

To exit from privileged EXEC mode back to EXEC mode, use the disable command.

DSLAM# disable
DSLAM>

The system administrator uses the enable password global configuration command to set the password, which is case-sensitive. If an enable password was not set, you can only access privileged EXEC mode from the console.

ROM Monitor Mode

ROM monitor mode provides access to a basic system kernel, from which you can boot the DSLAM or perform diagnostic tests. The system may enter ROM mode automatically if the DSLAM does not find a valid system image, or if the configuration file is corrupted. The ROM monitor prompt is the angle bracket:

You can also enter ROM monitor mode by intentionally interrupting the boot sequence with the Break key during loading.

To return to EXEC mode from ROM monitor mode, use the continue command:

> continue
DSLAM>

Global Configuration Mode

Global configuration mode provides access to commands that apply to the entire system. From global configuration mode you can also enter the other configuration modes described in these sections.

To enter global configuration mode from privileged EXEC mode, enter the configure command and specify the source of the configuration commands at the prompt. The prompt changes to the DSLAM's host name followed by (config)#:

DSLAM# configure
Configuring from terminal, memory, or network [terminal]? <CR>
Enter configuration commands, one per line. End with CNTL/Z.
DSLAM(config)#

You can specify either the terminal, nonvolatile memory (NVRAM), or a file stored on a network server as the source of configuration commands. The default is to enter commands from the terminal console.

As a shortcut for accessing the terminal method of configuration, enter:

DSLAM# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
DSLAM(config)#

To exit global configuration command mode and return to privileged EXEC mode, use the exit or end command, or press Ctrl-Z:

DSLAM(config)# end
DSLAM#

Interface Configuration Mode

Interface configuration mode provides access to commands that apply on an interface basis. Use these commands to modify the operation of an interface such as an ATM, Ethernet, or asynchronous port.

To enter interface configuration mode from global configuration mode, use the interface command with a keyword indicating the interface type, followed by an interface number. The prompt changes to the DSLAM's host name followed by (config-if)#:

DSLAM(config)# 
DSLAM(config)# interface atm 0/1
DSLAM(config-if)#

To exit interface configuration mode and return to global configuration mode, use the exit command:

DSLAM(config-if)# exit
DSLAM(config)#

To exit interface configuration mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(config-if)# end
DSLAM#

Profile Mode

Profile mode provides access to DSL profile commands. (See "Configuring Digital Subscriber Lines".)

From interface configuration mode, enter profile mode by specifying a profile using the profile command. For example:

Step
Command
Task

1.

DSLAM# configure terminal
Go to the global command level.

2.

DSLAM(config)# dsl-profile profile-name
Specify a profile.

3.

DSLAM(config-dsl-prof)# no alarms
Disable alarms for that profile.

Step	Command	Task
1.	DSLAM# configure terminal	Go to the global command level.
2.	DSLAM(config)# dsl-profile profile-name	Specify a profile.
3.	DSLAM(config-dsl-prof)# no alarms	Disable alarms for that profile.

To exit profile mode and return to global configuration mode, use the exit command:

DSLAM(config-dsl-prof)# exit
DSLAM(config)#

To exit profile mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(config-dsl-prof)# end
DSLAM#

Map-List Configuration Mode

Map-list configuration mode provides access to commands used to statically map protocol addresses of remote hosts or DSLAMs to PVCs or SVCs.

To enter map-list configuration mode from global configuration mode, use the map-list command followed by a map-list name. The prompt changes to (config-map-list)#:

DSLAM(config)# map-list newlist
DSLAM(config-map-list)#

You can also use the map-list command to enter map-list configuration mode directly from map-class configuration mode, without first returning to global configuration mode:

DSLAM(config-map-class)# map-list newlist
DSLAM(config-map-list)#

To exit map-list configuration mode and return to global configuration mode, use the exit command:

DSLAM(config-map-list)# exit
DSLAM(config)#

To exit map-list configuration mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(config-map-list)# end
DSLAM#

ATM Router Configuration Mode

ATM router configuration mode provides access to commands used to configure Private Network-to-Network Interface (PNNI) routing.

To enter ATM router configuration mode from global configuration mode, use the atm router pnni command. The prompt changes to (config-atm-router)#:

DSLAM(config)# atm router pnni
DSLAM(config-atm-router)#

To exit ATM router configuration mode and return to global configuration mode, use the exit command:

DSLAM(config-atm-router)# exit
DSLAM(config)#

To exit ATM router configuration mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(config-atm-router)# end
DSLAM#

PNNI Node Configuration Mode

The PNNI node configuration mode is a submode of ATM router configuration mode and provides access to commands you use to configure PNNI nodes on the DSLAM.

To enter PNNI node configuration mode from ATM router configuration mode, use the node command followed by a node index; the prompt changes to the DSLAM's host name followed by (config-pnni-node)#:

DSLAM(config-atm-router)# node 1
DSLAM(config-pnni-node)#

To exit PNNI node configuration mode and return to ATM router configuration mode, use the exit command:

DSLAM(config-pnni-node)# exit
DSLAM(config-atm-router)#

To exit PNNI node configuration mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(config-pnni-node)# exit
DSLAM#

ATM Accounting File Configuration Mode

ATM accounting file configuration mode provides access to commands used to configure a file for accounting and billing of virtual circuits (VCs).

To enter ATM accounting file configuration mode from global configuration mode, use the atm accounting file command followed by an accounting file name. The prompt changes to the DSLAM's host name followed by (config-acct-file)#:

DSLAM(config)# atm accounting file acctng_file1
DSLAM(config-acct-file)#

To exit ATM accounting file configuration mode and return to global configuration mode, use the exit command:

DSLAM(config-acct-file)# exit
DSLAM(config)#

To exit ATM accounting file configuration mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(config-acct-file)# end
DSLAM#

ATM Accounting Selection Configuration Mode

ATM accounting selection configuration mode provides access to commands used to specify the connection data to be gathered from the DSLAM.

To enter ATM accounting selection configuration mode, use the atm accounting selection command and specify an accounting selection index. The prompt changes to the DSLAM's host name followed by (config-acct-sel)#:

DSLAM(config)# atm accounting selection 1
DSLAM(config-acct-sel)#

To exit ATM accounting selection configuration mode and return to global configuration mode, use the exit command:

DSLAM(config-acct-sel)# exit
DSLAM(config)#

To exit ATM accounting selection configuration mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(config-acct-sel)# end
DSLAM#

ATM E.164 Translation Table Configuration Mode

ATM E.164 translation table configuration mode provides access to commands that you use to configure the translation table that maps native E.164 format addresses to ATM end system (AESA) format addresses.

To enter ATM E.164 translation table configuration mode from global configuration mode, use the atm e164 translation-table command; the prompt changes to the DSLAM's host name followed by (config-atm-e164)#:

DSLAM(config)# atm e164 translation-table
DSLAM(config-atm-e164)#

To exit ATM E.164 translation table configuration mode and return to global configuration mode, use the exit command:

DSLAM(config-atm-e164)# exit
DSLAM(config)#

To exit ATM E.164 translation table configuration mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(config-atm-e164)# end
DSLAM#

ATM Signaling Diagnostics Configuration Mode

ATM signaling diagnostics configuration mode provides access to commands used to configure the signaling diagnostics table.

To enter ATM signaling diagnostics configuration mode from global configuration mode, use the atm signalling diagnostics command and specify an index for the filter table. The prompt changes to the DSLAM's host name followed by (cfg-atmsig-diag):

DSLAM(config)# atm signalling diagnostics
DSLAM(cfg-atmsig-diag)#

To exit ATM signaling diagnostics configuration mode and return to global configuration mode, use the exit command:

DSLAM(cfg-atmsig-diag)# exit
DSLAM(config)#

To exit ATM signaling diagnostics configuration mode and return to privileged EXEC mode, use the end command or press Ctrl-Z:

DSLAM(cfg-atmsig-diag)# end
DSLAM#

Using Context-Sensitive Help

The user interface provides context-sensitive help in all modes. This section describes how to configure and display context-sensitive help.

Configuring Help for Terminal Sessions

To configure full help for the current terminal session, use this command in privileged EXEC mode:

Command
Task

terminal full-help

Configure the current terminal session to receive help for the full set of user-level commands.

Command	Task
terminal full-help	Configure the current terminal session to receive help for the full set of user-level commands.

To configure a specific line to allow users without privileged access to obtain full help, use this command in line configuration mode:

Command
Task

full-help

Configure a line to receive help for the full set of user-level commands.

Command	Task
full-help	Configure a line to receive help for the full set of user-level commands.

Displaying Context-Sensitive Help

To get help specific to a command mode, a command, a keyword, or argument, perform one of these tasks:

Command
Task

help

Obtain a brief description of the help system in any command mode.

abbreviated-command-entry?

Obtain a list of commands that begin with a particular character string.

abbreviated-command-entry<Tab>

Complete a partial command name.

?

List all commands available for a particular command mode.

command ?

List a command's associated keywords.

command keyword ?

List a keyword's associated arguments.

Command	Task
help	Obtain a brief description of the help system in any command mode.
abbreviated-command-entry?	Obtain a list of commands that begin with a particular character string.
abbreviated-command-entry<Tab>	Complete a partial command name.
?	List all commands available for a particular command mode.
command ?	List a command's associated keywords.
command keyword ?	List a keyword's associated arguments.

Using Word Help

To view a list of commands that begin with a particular character sequence, type those characters followed immediately by the question mark (?). Do not include a space. This form of help is called word help, because it completes a word for you.

In this example, the system displays the possible commands in privileged EXEC mode that begin with "co."

DSLAM# co?
configure  connect  copy

This form helps you determine the minimum subset that can be used when you abbreviate a command.

Command Syntax Help

To list keywords or arguments, enter a question mark (?) in place of a keyword or argument. Include a space before the ?. This form of help is called command syntax help, because it reminds you which keywords or arguments are applicable based on the command, keywords, and arguments you have already entered.

This example demonstrates the use of command syntax help to complete the access-list command. Entering the question mark (?) displays the allowed arguments:

DSLAM(config)# access-list ?
  <1-99>     IP standard access list
  <100-199>  IP extended access list

Enter the access list number, 99, followed by question mark (?) to display the allowed keywords:

DSLAM(config)# access-list 99 ?
  deny    Specify packets to reject
  permit  Specify packets to forward

Enter the deny argument followed by a question mark (?) to display the next argument (host name or IP address) and two keywords:

DSLAM(config)# access-list 99 deny ?
  Hostname or A.B.C.D  Address to match
  any                  Any source host
  host                 A single host address

Enter the IP address followed by a question mark (?) to display a final (optional) argument. The <cr> indicates that you can press Return to execute the command:

DSLAM(config)# access-list 99 deny 131.108.134.0 ?
  A.B.C.D  Wildcard bits
  <cr>
DSLAM(config)# <cr>

The system adds an entry to access list 99 that denies access to all hosts on subnet 131.108.134.0.

Checking Command Syntax

The user interface provides an error indicator (^) that appears in the command string in which you have entered an incorrect or incomplete command, keyword, or argument.

This example shows a command entry that is correct up to the last element:

DSLAM# clock set 13:04:30 28 apr 98
                                 ^
% Invalid input detected at '^' marker.

The caret symbol (^) and help response indicate the location in which the error occurs. To list the correct syntax, reenter the command, substituting a question mark (?) where the error occurred:

DSLAM# clock set 13:32:00 23 February ?
  <1993-2035> Year
DSLAM# clock set 13:32:00 23 February

Enter the year using the correct syntax and press Return to execute the command:

DSLAM# clock set 13:32:00 23 February 1993

Using the Command History Features

The user interface provides a history or record of commands you enter. You can use the command history feature for recalling long or complex commands or entries, including access lists. With the command history feature, you can complete the tasks in these sections:

Set the Command History Buffer Size
Recall Commands
Disable the Command History Feature

Setting the Command History Buffer Size

By default, the system records ten command lines in its history buffer. To set the number of command lines the system records during the current terminal session, use this command in privileged EXEC mode:

Command
Task

terminal history [size number-of-lines]

Enable the command history feature for the current terminal session.

Command	Task
terminal history [size number-of-lines]	Enable the command history feature for the current terminal session.

To configure the number of command lines the system records for a specific line, use this command in line configuration mode:

Command
Task

history [size number-of-lines]

Enable the command history feature.

Command	Task
history [size number-of-lines]	Enable the command history feature.

Recalling Commands

To recall commands from the history buffer, perform one of these tasks:

Key Sequence/Command
Task

Press Ctrl-P or the up arrow key.¹

Recall commands in the history buffer, beginning with the most recent command. Repeat the key sequence to recall successively older commands.

Press Ctrl-N or the down arrow key.¹

Return to more recent commands in the history buffer after recalling commands with Ctrl-P or the up arrow key. Repeat the key sequence to recall successively more recent commands.

show history

While in EXEC mode, list the last several commands you have just entered.

¹The arrow keys function only on ANSI-compatible terminals such as VT100s.

Key Sequence/Command	Task
Press Ctrl-P or the up arrow key.¹	Recall commands in the history buffer, beginning with the most recent command. Repeat the key sequence to recall successively older commands.
Press Ctrl-N or the down arrow key.¹	Return to more recent commands in the history buffer after recalling commands with Ctrl-P or the up arrow key. Repeat the key sequence to recall successively more recent commands.
show history	While in EXEC mode, list the last several commands you have just entered.

Disabling the Command History Feature

The command history feature is automatically enabled. To disable it during the current terminal session, use this command in EXEC mode:

Command
Task

terminal no history

Disable the command history feature for the current session.

Command	Task
terminal no history	Disable the command history feature for the current session.

To configure a specific line to disable the command history feature, use this command in line configuration mode:

Command
Task

no history

Configure the line to disable the command history feature.

Command	Task
no history	Configure the line to disable the command history feature.

Using the Editing Features

The user interface includes an enhanced editing mode that provides a set of editing key functions similar to those of the Emacs editor.

Using the editing features you can perform the tasks described in these sections:

Enable Enhanced Editing Mode
Move Around on the Command Line
Complete a Partial Command Name
Paste in Buffer Entries
Edit Command Lines that Wrap
Delete Entries
Scroll Down a Line or a Screen
Redisplay the Current Command Line
Transpose Mistyped Characters
Control Capitalization
Designate a Keystroke as a Command Entry
Disable Enhanced Editing Mode

Enabling Enhanced Editing Mode

Although the current software release enables the enhanced editing mode by default, you can disable it and revert to the editing mode of previous software releases.

To reenable the enhanced editing mode for the current terminal session, use this command in EXEC mode:

Command
Task

terminal editing

Enable the enhanced editing features for the current terminal session.

Command	Task
terminal editing	Enable the enhanced editing features for the current terminal session.

To reconfigure a specific line to have enhanced editing mode, use this command in line configuration mode:

Command
Task

editing

Enable the enhanced editing features.

Command	Task
editing	Enable the enhanced editing features.

Moving Around on the Command Line

Use these keystrokes to move the cursor around on the command line for corrections or changes:

Keystrokes
Task

Press Ctrl-B or
press the left arrow key.¹

Move the cursor back one character.

Press Ctrl-F or
press the right arrow key.¹

Move the cursor forward one character.

Press Ctrl-A.

Move the cursor to the beginning of the command line.

Press Ctrl-E.

Move the cursor to the end of the command line.

Press Esc B.

Move the cursor back one word.

Press Esc F.

Move the cursor forward one word.

¹The arrow keys function only on ANSI-compatible terminals such as VT100s.

Keystrokes	Task
Press Ctrl-B or press the left arrow key.¹	Move the cursor back one character.
Press Ctrl-F or press the right arrow key.¹	Move the cursor forward one character.
Press Ctrl-A.	Move the cursor to the beginning of the command line.
Press Ctrl-E.	Move the cursor to the end of the command line.
Press Esc B.	Move the cursor back one word.
Press Esc F.	Move the cursor forward one word.

Completing a Partial Command Name

If you cannot remember a complete command name, you can use the Tab key to allow the system to complete a partial entry:

Keystrokes
Task

Enter the first few letters and press the Tab key.

Complete a command name.

Keystrokes	Task
Enter the first few letters and press the Tab key.	Complete a command name.

If your keyboard does not have a Tab key, press Ctrl-I instead.

In this example, when you enter the letters conf and press the Tab key, the system provides the complete command:

DSLAM# conf<Tab>
DSLAM# configure

If you enter an ambiguous set of characters, the system generates an error message. To display the list of legal commands beginning with the specified string, enter a question mark (?) after you see the error message. See the section "Using Word Help".

Pasting in Buffer Entries

The system provides a buffer that contains the last ten items you deleted. You can recall these items and paste them in the command line by using these keystrokes:

Step
Keystrokes
Task

1.

Press Ctrl-Y.

Recall the most recent entry in the buffer.

2.

Press Esc Y.

Recall the next buffer entry.

Step	Keystrokes	Task
1.	Press Ctrl-Y.	Recall the most recent entry in the buffer.
2.	Press Esc Y.	Recall the next buffer entry.

The buffer contains only the last ten items you have deleted or cut. If you press Esc Y more than 10 times, you cycle back to the first buffer entry.

Editing Command Lines that Wrap

The new editing command set provides a wraparound feature for commands that extend beyond a single line on the screen. When the cursor reaches the right margin, the command line shifts 10 spaces to the left. You cannot see the first 10 characters of the line, but you can scroll back and check the syntax at the beginning of the command. To scroll back, use these keystrokes:

Keystrokes
Task

Press Ctrl-B or the left arrow key¹ repeatedly

Scroll back one character at a time to the beginning of a command line to verify that you entered a lengthy command correctly.

Press Ctrl-A

Return directly to the beginning of the line.

¹The arrow keys function only on ANSI-compatible terminals such as VT100s.

Keystrokes	Task
Press Ctrl-B or the left arrow key¹ repeatedly	Scroll back one character at a time to the beginning of a command line to verify that you entered a lengthy command correctly.
Press Ctrl-A	Return directly to the beginning of the line.

In this example, the access-list command entry extends beyond one line. When the cursor reaches the end of the line, the line is shifted ten spaces to the left and redisplayed. The dollar sign ($) indicates that the line has been scrolled to the left. Each time the cursor reaches the end of the line, the line is again shifted ten spaces to the left.

DSLAM(config)#  access-list 101 permit tcp 131.108.2.5 255.255.255.0 131.108.1
DSLAM(config)#  $ 101 permit tcp 131.108.2.5 255.255.255.0 131.108.1.20 255.25
DSLAM(config)#  $t tcp 131.108.2.5 255.255.255.0 131.108.1.20 255.255.255.0 eq
DSLAM(config)#  $108.2.5 255.255.255.0 131.108.1.20 255.255.255.0 eq 45

When you complete the entry, press Ctrl-A to check the complete syntax before pressing the Return key to execute the command. The dollar sign ($) appears at the end of the line to indicate that the line has scrolled to the right:

DSLAM(config)# access-list 101 permit tcp 131.108.2.5 255.255.255.0 131.108.1$

The DSLAM default is a terminal screen that is 80 columns wide. If you have a width other than that, use the terminal width command to provide correct width of your terminal.

Use line wrapping together with the command history feature to recall and modify previous complex command entries.

Deleting Entries

Use any of these keystrokes to delete command entries if you make a mistake or change your mind:

Keystrokes
Task

Press the Delete or Backspace key.

Erase the character to the left of the cursor.

Press Ctrl-D.

Delete the character at the cursor.

Press Ctrl-K.

Delete all characters from the cursor to the end of the command line.

Press Ctrl-U or Ctrl-X.

Delete all characters from the cursor to the beginning of the command line.

Press Ctrl-W.

Delete the word to the left of the cursor.

Press Esc D.

Delete from the cursor to the end of the word.

Keystrokes	Task
Press the Delete or Backspace key.	Erase the character to the left of the cursor.
Press Ctrl-D.	Delete the character at the cursor.
Press Ctrl-K.	Delete all characters from the cursor to the end of the command line.
Press Ctrl-U or Ctrl-X.	Delete all characters from the cursor to the beginning of the command line.
Press Ctrl-W.	Delete the word to the left of the cursor.
Press Esc D.	Delete from the cursor to the end of the word.

Scrolling Down a Line or a Screen

When you use the help facility to list the commands available in a particular mode, the list is often longer than the terminal screen can display. In such cases, a More prompt appears at the bottom of the screen. To respond to the More prompt, use these keystrokes:

Keystrokes
Task

Press the Return key.

Scroll down one line.

Press the Space bar.

Scroll down one screen.

Press the Esc key.

Stop scrolling and return to the main prompt.

Keystrokes	Task
Press the Return key.	Scroll down one line.
Press the Space bar.	Scroll down one screen.
Press the Esc key.	Stop scrolling and return to the main prompt.

Redisplaying the Current Command Line

If you enter a command and a message appears on your screen, you can easily recall your current command line entry. To do so, use these keystrokes:

Keystrokes
Task

Press Ctrl-L or Ctrl-R.

Redisplay the current command line.

Keystrokes	Task
Press Ctrl-L or Ctrl-R.	Redisplay the current command line.

Transposing Mistyped Characters

If you have mistyped a command entry, you can transpose the mistyped characters by using these keystrokes:

Keystrokes
Task

Press Ctrl-T.

Transpose the character to the left of the cursor and the character located at the cursor.

Keystrokes	Task
Press Ctrl-T.	Transpose the character to the left of the cursor and the character located at the cursor.

Controlling Capitalization

You can capitalize or lowercase words or capitalize a set of letters with these keystrokes:

Keystrokes
Task

Press Esc C.

Capitalize at the cursor.

Press Esc L.

Change the word at the cursor to lowercase.

Press Esc U.

Capitalize letters from the cursor to the end of the word.

Keystrokes	Task
Press Esc C.	Capitalize at the cursor.
Press Esc L.	Change the word at the cursor to lowercase.
Press Esc U.	Capitalize letters from the cursor to the end of the word.

Designating a Keystroke as a Command Entry

To use a particular keystroke as an executable command, insert a system code for this purpose:

Keystrokes
Task

Press Ctrl-V or Esc Q.

Insert a code to indicate to the system that the keystroke that follows should be treated as a command entry, not an editing key.

Keystrokes	Task
Press Ctrl-V or Esc Q.	Insert a code to indicate to the system that the keystroke that follows should be treated as a command entry, not an editing key.

Disabling Enhanced Editing Mode

To disable enhanced editing mode and revert to the editing mode, use this command in privileged EXEC mode:

Command
Task

terminal no editing

Disable the enhanced editing features for the local line.

Command	Task
terminal no editing	Disable the enhanced editing features for the local line.

If you have prebuilt scripts that do not interact well when enhanced editing is enabled, you can disable enhanced editing mode. To reenable enhanced editing mode, use the terminal editing command.

Ending a Session

After you use the setup command or other configuration command, exit the DSLAM and quit the session.

To end a session, use this EXEC command:

Command
Task

quit

End the session.

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Cisco DSLAM User Interface