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Access Services Command Reference
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About The Cisco IOS Software Documentation
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Terminal Line and Modem Support Commands
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Connection Commands
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AppleTalk Remote Access Commands
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SLIP and PPP Commands
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XRemote Configuration Commands
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LAT Commands
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Telnet Commands
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TN3270 Commands
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Protocol Translation Commands
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Configuring Modem Support and Chat Scripts
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X.3 PAD
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Regular Expressions
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Table Of Contents
Terminal Line and Modem Support Commands
default-value exec-character-bits
default-value special-character-bits
terminal-queue entry-retry-interval
Terminal Line and Modem Support Commands
The line configuration commands described in this chapter are used to configure modems and modem lines on access servers and routers.
Some commands in this chapter describe how to set terminal operating characteristics on lines for all connections to an interface line. You also can set terminal operating characteristics for only the current connection when in EXEC mode. The commands that change terminal operating characteristics for currently open sessions are described in the "Connection Commands" chapter in this publication.
For example, the transport preferred command sets the preferred transport method on a line for all connections and is described in this chapter. The terminal transport preferred command sets the preferred transport method in EXEC mode for the current connection only, and is described in the "Connection Commands" chapter.
Note
Some commands previously documented in this chapter have been replaced by new commands. Although these continue to perform their normal functions in the current release, support for these commands will cease in future releases.
For line configuration information and examples, refer to the "Configuring Terminal Lines and Modem Support" chapter in the Access Services Configuration Guide.
absolute-timeout
To set the interval for closing the connection, use the absolute-timeout line configuration command. Use the no form of this command to restore the default.
absolute-timeout minutes
no absolute-timeoutSyntax Description
Default
No timeout interval is automatically set.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.0.
This command terminates the connection after the specified time period has elapsed, regardless of whether the connection is being used at the time of termination. You can specify an absolute-timeout value for each port. The user is given 20 seconds notice before the session is terminated. You can use this command in conjunction with the logout-warning command, which notifies the user of an impending logout.
Note
Example
The following example sets an interval of 60 minutes on line 5:
line 5absolute-timeout 60Related Commands
activation-character
To define the character you enter at a vacant terminal to begin a terminal session, use the activation-character line configuration command. Use the no form of this command to make any character activate a terminal.
activation-character ascii-number
no activation-characterSyntax Description
Default
Return (decimal 13)
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
See the "ASCII Character Set" appendix in the Configuration Fundamentals Command Reference for a list of ASCII characters.
Note
Example
The following example sets the activation character for the console to Delete, which is Decimal 127:
line console activation-character 127autobaud
To set the line for automatic baud detection, use the autobaud line configuration command. Use the no autobaud command to restore the default.
autobaud
no autobaudSyntax Description
This command has no arguments or keywords.
Default
No autobaud detection
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The autobaud detection supports a range from 300 to 19200 baud. A line set for autobaud cannot be used for outgoing connections, nor can you set autobaud capability on a line using 19200 baud when the parity bit is set (because of hardware limitations).
Example
The following example sets the auxiliary port for autobaud detection:
line 5 autobaudautocommand
To configure the Cisco IOS software to automatically execute a command when a user connects to a particular line, use the autocommand line configuration command.
autocommand command
Syntax Description
command
Any appropriate EXEC command, including the host name and any switches that occur with the EXEC command.
Default
None
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command enables you to automatically execute an EXEC command when a user connects to a line.
Example
The following example forces an automatic connection to a host named host21 (which could be an IP address):
line vty 4 autocommand connect host21autohangup
To configure automatic line disconnect, use the autohangup line configuration command. This command causes the EXEC to issue the exit command when the last connection closes.
autohangup
Syntax Description
This command has no arguments or keywords.
Default
Disabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command is useful for UNIX UUCP applications that automatically disconnect lines because UUCP scripts cannot issue the exit command to hang up the telephone.
Example
The following example enables automatic line disconnect on lines 5 through 10:
line 5 10 autohangupautoselect
To configure a line to start an ARA, PPP, or SLIP session, use the autoselect line configuration command. Use the no form of this command to disable this function on a line.
autoselect {arap | ppp | slip | during-login}
no autoselectSyntax Description
Default
ARA session.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.3. The no autoselect command and the during-login command first appeared in Cisco IOS Release 11.0.
This command eliminates the need for users to enter an EXEC command to start an ARA, PPP, or SLIP session.
Note
The autoselect command configures the Cisco IOS software to identify the type of connection being requested. For example, when a user on a Macintosh running ARA selects the Connect button, the Cisco IOS software automatically starts an ARAP session. If, on the other hand, the user is running SLIP or PPP and uses the autoselect ppp or autoselect slip command, the Cisco IOS software automatically starts a PPP or SLIP session, respectively. This command is used on lines making different types of connections.
A line that does not have autoselect configured views an attempt to open a connection as noise. The router does not respond and the user client times out.
Note
Examples
The following example enables ARA on a line:
line 3arap enableautoselect arapThe following example enables PPP on a line:
line 7autoselect pppThe following example enables ARA on a line and allows logins from users with a modified CCL script and an unmodified script to log in:
line 3arap enableautoselect arapautoselect during-loginarap noguest if-neededRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
arap use-tacacs †
ppp authentication chap †
ppp authentication pap †
ppp use-tacacs †banner exec
To display a banner on terminals with an interactive EXEC, use the banner exec global configuration command. This command specifies a message to be displayed when an EXEC process is created (a line is activated, or an incoming connection is made to a VTY line). The no form of this command deletes the EXEC banner.
banner exec d message d
no banner execSyntax Description
d
Delimiting character of your choice—a pound sign (#) for example. You cannot use the delimiting character in the banner message.
message
Message text.
Default
None
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Follow this command with one or more blank spaces and a delimiting character of your choice. Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character.
When someone connects to the router, the MOTD banner appears before the login prompt. After the user successfully logs in to the router, the EXEC banner or incoming banner will be displayed, depending on the type of connection. For a reverse Telnet login, the incoming banner will be displayed. For all other connections, the router will display the EXEC banner.
To disable the EXEC banner on a particular line, use the no exec-banner line configuration command.
Example
The following example sets an EXEC banner. The dollar sign ($) is used as a delimiting character.
banner exec $Session activated. Enter commands at the prompt.$Related Commands
banner incoming
banner login
banner motd
exec-bannerbanner incoming
To specify a banner used when you have an incoming connection to a line from a host on the network, use the banner incoming global configuration command. The no form of this command deletes the incoming connection banner.
banner incoming d message d
no banner incomingSyntax Description
d
Delimiting character of your choice—a pound sign (#) for example. You cannot use the delimiting character in the banner message.
message
Message text.
Default
None
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Follow this command with one or more blank spaces and a delimiting character of your choice. Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character.
An incoming connection is one initiated from the network side of the router. Incoming connections are also called reverse Telnet sessions. These sessions can display MOTD banners and incoming banners, but they do not display EXEC banners. Use the no motd-banner line configuration command to disable the MOTD banner for reverse Telnet sessions on asynchronous lines.
When a user connects to the router, the MOTD banner appears before the login prompt. After the user successfully logs in to the router, the EXEC banner or incoming banner will be displayed, depending on the type of connection. For a reverse Telnet login, the incoming banner will be displayed. For all other connections, the router will display the EXEC banner.
Incoming banners cannot be suppressed. If you do not want the incoming banner to appear, you must delete it with the no banner incoming command.
Example
The following example sets an incoming connection banner. The pound sign (#) is used as a delimiting character.
banner incoming # Welcome to Reuses. #Related Commands
banner exec
banner login
banner motd
motd-bannerbanner login
To display a login banner, use the banner login global configuration command. This command specifies a message to be displayed before the username and password login prompts. The no form of this command deletes the login banner.
banner login d message d
no banner loginSyntax Description
d
Delimiting character of your choice—a pound sign (#) for example. You cannot use the delimiting character in the banner message.
message
Message text.
Default
None
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Follow this command with one or more blank spaces and a delimiting character of your choice. Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character.
When someone connects to the router, the MOTD banner (if configured) appears first, followed by the login banner and prompts. After the user successfully logs in to the router, the EXEC banner or incoming banner will be displayed, depending on the type of connection. For a reverse Telnet login, the incoming banner will be displayed. For all other connections, the router will display the EXEC banner.
Example
The following example sets a login banner. The dollar sign ($) is used as a delimiting character.
banner login $Welcome to Bob's Router$Related Commands
You can use the master indexes or search online to find documentation of related commands.
banner exec
banner incoming
banner motdbanner motd
To specify a message-of-the-day (MOTD) banner, use the banner motd global configuration command. The no form of this command deletes the MOTD banner.
banner motd d message d
no banner motdSyntax Description
d
Delimiting character of your choice—a pound sign (#) for example. You cannot use the delimiting character in the banner message.
message
Message text.
Default
None
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Follow this command with one or more blank spaces and a delimiting character of your choice. Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character.
This MOTD banner is displayed to all terminals connected and is useful for sending messages that affect all users (such as impending system shutdowns). Use the no exec-banner or no motd-banner command to disable the MOTD banner on a line. The no exec-banner command also disables the EXEC banner on the line.
When someone connects to the router, the MOTD banner appears before the login prompt. After the user successfully logs in to the router, the EXEC banner or incoming banner will be displayed, depending on the type of connection. For a reverse Telnet login, the incoming banner will be displayed. For all other connections, the router will display the EXEC banner.
The banner command without any keywords specified defaults to the banner motd command. When a new banner motd command is added to the configuration, it overwrites the existing banner command if no keyword is specified. Similarly, if a banner command is added to the configuration, any existing banner motd command is overwritten.
Example
The following example sets a MOTD banner. The pound sign (#) is used as a delimiting character.
banner motd # Building power will be off from 7:00 AM until 9:00 AM this coming Tuesday. #Related Commands
banner exec
banner incoming
banner login
exec-banner
motd-bannerbusy-message
To create a "host failed" message that displays when a connection fails, use the busy-message global configuration command. Use the no form of this command to disable the "host failed" message from displaying on the specified host.
busy-message hostname d message d
no busy-message hostnameSyntax Description
hostname
Name of the host that cannot be reached.
d
Delimiting character of your choice—a pound sign (#) for example. You cannot use the delimiting character in the message.
message
Message text.
Default
None
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command applies only to Telnet connections.
Follow the busy-message command with one or more blank spaces and a delimiting character of your choice. Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character.
Defining a "host failed" message for a host prevents all Cisco IOS software-initiated user messages, including the initial message that indicates the connection is "Trying..." The busy-message command can be used in the autocommand command to suppress these messages.
Example
The following example sets a message that will be displayed on the terminal whenever an attempt to connect to the host named dross fails. The pound sign (#) is used as a delimiting character.
busy-message dross # Cannot connect to host. Contact the computer center. #callback forced-wait
To force the Cisco IOS software to wait before initiating a callback to a requesting client, use the callback forced-wait global configuration command.
callback forced-wait
Syntax Description
This command has no arguments or keywords.
Default
The forced waiting period is not set.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
Use this command when the router is calling back a modem that initiated a call, then dropped the connection, but requires a rest period before subsequent input is accepted.
Example
The following example sets a waiting period during which a callback chat script is delayed from being sent on an outgoing target line:
callback-forced-waitRelated Commands
A dagger (†) indicates that the command is documented outside this chapter. Two daggers (††) indicate that the command is documented in the Debug Command Reference.
arap callback †
chat-script †
debug callback ††
ppp callback †
service exec-callback
username †clear line
To return a terminal line to idle state, use the clear line EXEC command.
clear line line-number
Syntax Description
Default
None
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Use this command to log out of a specific session running on another line. If the line uses a modem, the modem will be disconnected.
Example
In the following example, line 3 is reset to idle state:
clear line 3clear modem
To reset a manageable modem's hardware on a Cisco AS5200 access server, use the clear modem EXEC command.
clear modem [slot/modem-port | group group-number]
Syntax Description
slot/modem-port
Slot and modem port number. Remember to include the forward slash (/) when entering this variable.
group group-number
Modem group.
Default
Disabled
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
This command resets the specified modem or group of modems, or all the modems in the system. The modem hardware is reset for modems that are idle or busied out for long periods of time.
You can construct a logical modem group using the interface group-async command.
Example
The following example resets the hardware for manageable modem 1/1:
clear modem 1/1clear modem at-mode
To clear an attention (AT) directly connected session to a manageable modem from a second Telnet session into the Cisco AS5200, use the clear modem at-mode EXEC command.
clear modem at-mode slot/modem-port
Syntax Description
at-mode
An AT directly connected session.
slot/modem-port
Slot and modem port number. Remember to include the forward slash (/) when entering this variable.
Default
Disabled
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
This command applies only to the Cisco AS5200 access server.
An AT directly connected session is usually initiated and closed from the same Telnet session by means of the modem at-mode command and Ctrl-C. However, you can clear an AT directly connected session that was mistakenly left open, by enabling the clear modem at-mode command from a second Telnet session into the access server.
Examples
The following example shows how to execute the modem at-mode command from a Telnet session:
modem at-mode 1/1The following example shows how to execute the clear modem at-mode command from a second Telnet session while the first Telnet session is connected to the modem:
AS5200# clear modem at-mode 1/1clear "modem at-mode" for modem 1/1 [confirm]AS5200#The following output is displayed in the first Telnet session once the modem is cleared by the second Telnet session:
Direct connect session cleared by vty0 (171.69.1.164)Related Command
modem at-mode
clear modem counters
To clear the statistical counters on a manageable modem installed in a Cisco AS5200 access server, use the clear modem counters EXEC command.
clear modem counters [slot/modem-port | group group-number]
Syntax Description
slot/modem-port
(Optional) Slot and modem port number. Remember to include the forward slash (/) when entering this variable.
group group-number
(Optional) Modem group.
Default
Disabled
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
Entering the clear modem counters command without specifying an optional keyword or argument resets the modem statistics on each Cisco AS5200 modem and the summary statistics displayed in the show modem summary command.
You can create a logical modem group using the interface group-async command.
Example
The following example shows how clear the statistical counters on manageable modem 1/1:
clear modem counters 1/1copy modem
To download firmware to modems in the Cisco AS5200 access server, use the copy modem EXEC command.
copy {flash | tftp | rcp} modem
Syntax Description
flash
Copies firmware from Flash memory to the modem.
tftp
Copies firmware from the TFTP server to the modem.
rcp
Downloads a remote copy of the firmware from a network server to the modem.
Default
Disabled
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
After you enable this command, you are asked to provide the download destination (a slot/modem-port or all), the remote host name, and the path leading to the source modem firmware.
If a modem that you wish to upgrade is busy with a call when the copy modem command is enabled, the upgrade for that modem yields until the active call is dropped. All other idle modems in the upgrade range proceed with the downloading operation.
Examples
The following example shows how to copy the modem firmware file called modem_upgrade from the TFTP server called Modem_Server to modem 2/0, which is installed in the Cisco AS5200 access server:
AS5200# copy tftp modemModem Firmware Download Modem Numbers? 2/0Address or name of remote host [UNKNOWN]? Modem_ServerSource file name? dirt/elem/modem_upgradeAccessing file 'dirt/elem/modem_upgrade on Modem_Server...Loading dirt/elem/modem_upgrade .from 223.255.254.254 (via Ethernet0): ! [OK]Loading dirt/elem/modem_upgrade from 223.255.254.254 (via Ethernet0): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK - 237503/278528 bytes]AS5200#%MODEM-5-DL_START: Modem (2/0) started firmware download%MODEM-5-DL_GOOD: Modem (2/0) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85As shown in this example, you might want to upgrade and test one modem's firmware before upgrading the firmware of all the modems on the access server, as shown in the next example.
This example shows how to download the same modem firmware file from the TFTP server to all the modems in the Cisco AS5200 access server:
AS5200# copy tftp modemModem Firmware Download Modem Numbers? allAddress or name of remote host [UNKNOWN]? Modem_ServerSource file name? dirt/elem/modem_upgradeAccessing file 'dirt/elem/modem_upgrade on Modem_Server...Loading dirt/elem/modem_upgrade .from 223.255.254.254 (via Ethernet0): ! [OK]Loading dirt/elem/modem_upgrade from 223.255.254.254 (via Ethernet0): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK - 237503/278528 bytes]AS5200#%MODEM-5-DL_START: Modem (2/0) started firmware download%MODEM-5-DL_START: Modem (2/1) started firmware download%MODEM-5-DL_START: Modem (2/2) started firmware download%MODEM-5-DL_START: Modem (2/3) started firmware download%MODEM-5-DL_START: Modem (2/4) started firmware download%MODEM-5-DL_START: Modem (2/5) started firmware download%MODEM-5-DL_START: Modem (2/6) started firmware download%MODEM-5-DL_START: Modem (2/7) started firmware download%MODEM-5-DL_START: Modem (2/8) started firmware download%MODEM-5-DL_START: Modem (2/9) started firmware download%MODEM-5-DL_START: Modem (2/10) started firmware download%MODEM-5-DL_START: Modem (2/11) started firmware download%MODEM-5-DL_START: Modem (2/12) started firmware download%MODEM-5-DL_START: Modem (2/13) started firmware download%MODEM-5-DL_START: Modem (2/14) started firmware download%MODEM-5-DL_START: Modem (2/15) started firmware download%MODEM-5-DL_START: Modem (2/16) started firmware download%MODEM-5-DL_START: Modem (2/17) started firmware download%MODEM-5-DL_START: Modem (2/18) started firmware download%MODEM-5-DL_START: Modem (2/19) started firmware download%MODEM-5-DL_START: Modem (2/20) started firmware download%MODEM-5-DL_START: Modem (2/21) started firmware download%MODEM-5-DL_START: Modem (2/22) started firmware download%MODEM-5-DL_START: Modem (2/23) started firmware download%MODEM-5-DL_GOOD: Modem (2/2) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/10) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/4) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/6) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/7) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/12) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/11) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/13) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/1) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/14) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/19) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/22) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/5) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/8) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/9) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/17) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/0) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/3) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/21) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/16) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/15) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/18) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/20) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85%MODEM-5-DL_GOOD: Modem (2/23) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85The following example shows how to copy the modem firmware file called STAR.M from Flash memory to the integrated modem 1/2:
AS5200# copy flash modemModem Numbers (<slot>/<port> | group <number> | all)? 1/2System flash directory:File Length Name/status1 3539820 as5200-i-m.allcookies2 239203 STAR.M3 23072 BOOT.105 [3802288 bytes used, 4586320 available, 8388608 total]Source file name? STAR.MAS5200#%MODEM-5-DL_START: Modem (1/2) started firmware download%MODEM-5-DL_GOOD: Modem (1/2) completed firmware download: MNPClass10V.34/V.FCModemRev1.0.23/85.23/85AS5200#databits
To set the number of data bits per character that are interpreted and generated by the router hardware, use the databits line configuration command.
databits {5 | 6 | 7 | 8}
Syntax Description
5
Five data bits per character.
6
Six data bits per character.
7
Seven data bits per character.
8
Eight data bits per character.
Default
8 data bits per character
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The databits line configuration command can be used to mask the high bit on input from devices that generate 7 data bits with parity. If parity is being generated, specify 7 data bits per character. If no parity generation is in effect, specify 8 data bits per character. The other keywords are supplied for compatibility with older devices and generally are not used.
Example
The following example changes the data bits to 7 on line 4:
line 4 databits 7Related Commands
The commands followed by a dagger (†) are documented in the "Connection Commands" chapter.
terminal data-character-bits †
terminal databits †data-character-bits
To set the number of data bits per character that are interpreted and generated by the Cisco IOS software, use the data-character-bits line configuration command.
data-character-bits {7 | 8}
Syntax Description
Default
8 data bits per character
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The data-character-bits line configuration command is used primarily to strip parity from X.25 connections on routers with the protocol translation software option. The data-character-bits line configuration command does not work on hard-wired lines.
Example
The following example sets the number of data bits per character for virtual terminal line 1 to 7:
line vty 1data-character-bits 7Related Command
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
terminal data-character-bits†
default-value exec-character-bits
To define the EXEC character width for either 7 bits or 8 bits, use the default-value exec-character-bits global configuration command.
default-value exec-character-bits {7 | 8}
Syntax Description
Default
7-bit ASCII character set
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Configuring the EXEC character width to 8 bits allows you to add graphical and international characters in banners, prompts, and so forth. However, setting the EXEC character width to 8 bits can also cause failures. If a user on a terminal that is sending parity enters the command help, an "unrecognized command" message appears because the system is reading all 8 bits, although the eighth bit is not needed for the help command.
Example
The following example selects the full 8-bit ASCII character set for EXEC banners and prompts:
default-value exec-character-bits 8Related Commands
The commands followed by a dagger (†) are documented in the "Connection Commands" chapter.
default-value special-character-bits
exec-character-bits
special-character-bits
terminal exec-character-bits †
terminal special-character-bits †default-value special-character-bits
To configure the flow control default value from a 7-bit width to an 8-bit width, use the default-value special-character-bits global configuration command.
default-value special-character-bits {7 | 8}
Syntax Description
Default
7-bit character set
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Configuring the special character width to 8 bits allows you to add graphical and international characters in banners, prompts, and so forth.
Example
The following example selects the full 8-bit special character set:
default-value special-character-bits 8Related Commands
The commands followed by a dagger (†) are documented in the "Connection Commands" chapter.
default-value exec-character-bits
exec-character-bits
special-character-bits
terminal exec-character-bits †
terminal special-character-bits †disconnect-character
To define a character to disconnect a session, use the disconnect-character line configuration command. Use the no form of this command to remove the disconnect character.
disconnect-character ascii-number
no disconnect-characterSyntax Description
Default
No disconnect character is defined.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The Break character is represented by zero; NULL cannot be represented.
To use the session-disconnect character in normal communications, precede it with the escape character. See the "ASCII Character Set" appendix in the Configuration Fundamentals Command Reference for a list of ASCII characters.
Example
The following example sets the disconnect character for virtual terminal line 4 to Escape, which is decimal character 27:
line vty 4 disconnect-character 27dispatch-character
To define a character that causes a packet to be sent, use the dispatch-character line configuration command. Use the no form of this command to remove the definition of the specified dispatch character.
dispatch-character ascii-number1 [ascii-number2 . . . ascii-number]
no dispatch-character ascii-number1 [ascii-number2 . . . ascii-number]Syntax Description
ascii-number
Decimal representation of the character, such as Return (decimal 13) for line-at-a-time transmissions.
Default
No dispatch character is defined.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The dispatch-character command defines a dispatch character that causes a packet to be sent even if the dispatch timer has not expired. It causes the Cisco IOS software to attempt to buffer characters into larger-sized packets for transmission to the remote host.
Enable the dispatch-character command from the session that initiates the connection, not from the incoming side of a streaming telnet.
This command can take multiple arguments, so you can define any number of characters as dispatch characters.
Example
The following example specifies the Return character (decimal 13) as the dispatch character:
line vty 4 dispatch-character 13Related Commands
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
dispatch-machine
dispatch-timeout
state-machine
terminal dispatch-character †dispatch-machine
To specify an identifier for a TCP packet dispatch state machine, use the dispatch-machine line configuration command.
dispatch-machine name
Syntax Description
Default
No dispatch state machine identifier is defined.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
When the dispatch-timeout command is specified, a packet being built will be sent when the timer expires, and the state will be reset to zero.
Any dispatch characters specified using the dispatch-character command are ignored when a state machine is also specified.
If a packet becomes full, it will be sent regardless of the current state, but the state is not reset. The packet size depends on the traffic level on the asynchronous line and the dispatch-timeout value. There is always room for 60 data bytes. If the dispatch-timeout value is greater than or equal to 100 ms, a packet size of 536 (data bytes) is allocated.
Example
The following example specifies the name linefeed for the state machine:
state-machine linefeed 0 0 9 0 state-machine linefeed 0 11 255 0 state-machine linefeed 0 10 10 transmit line 1 dispatch-machine linefeedRelated Commands
dispatch-character
dispatch-timeout
state-machinedispatch-timeout
To set the character dispatch timer, use the dispatch-timeout line configuration command. Use the no form of this command to remove the timeout definition.
dispatch-timeout milliseconds
no dispatch-timeoutSyntax Description
Default
No dispatch timeout is defined.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The dispatch-timeout line configuration command causes the software to buffer characters into packets for transmission to the remote host. The Cisco IOS software sends a packet a specified amount of time after the first character is put in the buffer. You can use the dispatch-timeout and dispatch-character line configuration commands together. In this case, the software dispatches a packet each time the dispatch character is entered, or after the specified dispatch timeout interval, depending on which condition is met first.
Note
Example
The following example sets the dispatch timer to 80 ms:
line vty 0 4 dispatch-timeout 80Related Commands
dispatch-character
dispatch-machine
state-machineediting
To enable enhanced editing mode for a particular line, use the editing line configuration command. Use the no form of this command to disable the enhanced editing mode.
editing
no editingSyntax Description
This command has no arguments or keywords.
Default
Enabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
provides a description of the keys used to enter and edit commands. "Ctrl" indicates the Control key. It must be pressed simultaneously with its associated letter key. "Esc" indicates the Escape key. It must be pressed first, followed by its associated letter key. Keys are not case sensitive.
Table 1 Editing Keys and Functions for Software Release 9.21 and Later
Tab
Completes a partial command name entry. When you enter a unique set of characters and press the Tab key, the system completes the command name. If you enter a set of characters that could indicate more than one command, the system beeps to indicate an error. Enter a question mark (?) immediately following the partial command (no space). The system provides a list of commands that begin with that string.
Delete or Backspace
Erases the character to the left of the cursor.
Return
At the command line, pressing the Return key performs the function of processing a command. At the "---More---" prompt on a terminal screen, pressing the Return key scrolls down a line.
Space Bar
Allows you to see more output on the terminal screen. Press the space bar when you see the line "---More---" on the screen to display the next screen.
Left arrow1
Moves the cursor one character to the left. When you enter a command that extends beyond a single line, you can press the Left Arrow key repeatedly to scroll back toward the system prompt and verify the beginning of the command entry.
Right arrow1
Moves the cursor one character to the right.
Up arrow1 or Ctrl-P
Recalls commands in the history buffer, beginning with the most recent command. Repeat the key sequence to recall successively older commands.
Down arrow1 or
Ctrl-NReturn to more recent commands in the history buffer after recalling commands with the Up Arrow or Ctrl-P. Repeat the key sequence to recall successively more recent commands.
Ctrl-A
Moves the cursor to the beginning of the line.
Ctrl-B
Moves the cursor back one character.
Ctrl-D
Deletes the character at the cursor.
Ctrl-E
Moves the cursor to the end of the command line.
Ctrl-F
Moves the cursor forward one character.
Ctrl-K
Deletes all characters from the cursor to the end of the command line.
Ctrl-L and Ctrl-R
Redisplays the system prompt and command line.
Ctrl-T
Transposes the character to the left of the cursor with the character located at the cursor.
Ctrl-U and Ctrl-X
Deletes all characters from the cursor back to the beginning of the command line.
Ctrl-V and Esc Q
Inserts a code to indicate to the system that the keystroke immediately following should be treated as a command entry, not as an editing key.
Ctrl-W
Deletes the word to the left of the cursor.
Ctrl-Y
Recalls the most recent entry in the delete buffer. The delete buffer contains the last ten items you have deleted or cut. Ctrl-Y can be used in conjunction with Esc Y.
Ctrl-Z
Ends configuration mode and returns you to the EXEC prompt.
Esc B
Moves the cursor back one word.
Esc C
Capitalizes the word at the cursor.
Esc D
Deletes from the cursor to the end of the word.
Esc F
Moves the cursor forward one word.
Esc L
Changes the word at the cursor to lowercase.
Esc U
Capitalizes from the cursor to the end of the word.
Esc Y
Recalls the next buffer entry. The buffer contains the last ten items you have deleted. Press Ctrl-Y first to recall the most recent entry. Then press Esc Y up to nine times to recall the remaining entries in the buffer. If you bypass an entry, continue to press Esc Y to cycle back to it.
1 The arrow keys function only with ANSI-compatible terminals.
Example
In the following example, enhanced editing mode is disabled on virtual terminal line 3:
line vty 3no editingRelated Command
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
terminal editing†
escape-character
To define a system escape character, use the escape-character line configuration command. Use the no form of this command to set the escape character to Break.
escape-character ascii-number | none
no escape-characterSyntax Description
ascii-number
Either the decimal representation of the character or a control sequence (Ctrl-E, for example).
none
Disables escape entirely.
Default
Ctrl-^
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The Break key cannot be used as an escape character on the console terminal because the Cisco IOS software interprets Break as an instruction to halt the system. To send the escape character to the other side, press Ctrl-^ twice.
See the "ASCII Character Set" appendix in the Configuration Fundamentals Command Reference for a list of ASCII characters.
Example
The following example sets the escape character to Ctrl-P, which is decimal character 16:
line console escape-character 16Related Commands
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
terminal escape-character†
exec
To allow an EXEC process on a line, use the exec line configuration command. Use the no form of this command to turn off the EXEC process for the specified line.
exec
no execSyntax Description
This command has no arguments or keywords.
Default
The EXEC processes start is activated automatically on all lines.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
When you want to allow an outgoing connection only for a line, use the no exec command. When a user tries to Telnet to a line with the no exec command configured, the user will get no response when pressing the Return key at the login screen.
Example
The following example illustrates how to turn off the EXEC on line 7. You might want to do this on the auxiliary port if the attached device (for example, the control port of a rack of modems) sends unsolicited data. If this happens, an EXEC process starts, which makes the line unavailable.
line 7 no execexec-banner
To display EXEC and MOTD banners, use the exec-banner line configuration command. Use the no form of this command to suppress the banners.
exec-banner
no exec-bannerSyntax Description
This command has no arguments or keywords.
Default
Enabled on all lines.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command determines whether the router will display the EXEC banner and the message-of-the-day (MOTD) banner when an EXEC session is created. These banners are defined with the banner exec and banner motd commands. By default, these banner are enabled on all lines. Disable the EXEC and MOTD banners using the no exec-banner command.
This command has no effect on the incoming banner, which is controlled by the banner incoming command.
The MOTD banners can also be disabled by the no motd-banner line configuration command, which disables MOTD banners on a line. If the no exec-banner command is configured on a line, the MOTD banner will be disabled regardless of whether the motd-banner command is enabled or disabled. summarizes the effects of the exec-banner command and the motd-banner command.
Table 2 Banners Displayed
MOTD banner
EXEC banner
None
EXEC banner
None
For reverse Telnet connections, the EXEC banner is never displayed. Instead, the incoming banner is displayed. The MOTD banner is displayed by default, but it is disabled if either the no exec-banner command or no motd-banner command is configured. summarizes the effects of the exec-banner command and the motd-banner command for reverse Telnet connections.
Example
The following example suppresses the EXEC and MOTD banners on virtual terminal lines 0 to 4:
line vty 0 4no exec-bannerRelated Commands
banner exec
banner incoming
banner motd
motd-bannerexec-character-bits
To configure the character widths of EXEC and configuration command characters, use the exec-character-bits line configuration command.
exec-character-bits {7 | 8}
Syntax Description
7
Selects the 7-bit character set.
8
Selects the full 8-bit character set for use of international and graphical characters in banner messages, prompts, and so forth.
Default
7-bit ASCII character set
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Setting the EXEC character width to 8 allows you to use special graphical and international characters in banners, prompts, and so forth. However, setting the EXEC character width to 8 bits can cause failures. If a user on a terminal that is sending parity enters the help command, an "unrecognized command" message appears because the system is reading all 8 bits, and the eighth bit is not needed for the help command.
Note
Example
The following example enables full 8-bit international character sets, except for the console, which is an ASCII terminal. It illustrates use of the default-value exec-character-bits global configuration command and the exec-character-bits line configuration command.
default-value exec-character-bits 8line 0exec-character-bits 7Related Commands
A command followed by a dagger (†) is documented in the "Connection Commands" chapter.
default-value exec-character-bits
default-value special-character-bits
special-character-bits
terminal exec-character-bits †
terminal special-character-bits †exec-timeout
To set the interval that the EXEC command interpreter waits until user input is detected, use the exec-timeout line configuration command. Use the no form of this command to remove the timeout definition.
exec-timeout minutes [seconds]
no exec-timeoutSyntax Description
minutes
Integer that specifies the number of minutes.
seconds
(Optional) Additional time intervals in seconds. An interval of zero specifies no timeouts.
Default
10 minutes
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
If no input is detected, the EXEC facility resumes the current connection, or if no connections exist, it returns the terminal to the idle state and disconnects the incoming session. It is the same as entering exec-timeout 0.
Examples
The following example sets a time interval of 2 minutes, 30 seconds:
line console exec-timeout 2 30The following example sets a time interval of 10 seconds:
line console exec-timeout 0 10flowcontrol
To set the method of data flow control between the terminal or other serial device and the router, use the flowcontrol line configuration command. Use the no form of this command to disable flow control.
flowcontrol {none | software [lock] [in | out] | hardware [in | out]}
no flowcontrol {none | software [in | out] | hardware [in | out]}Syntax Description
Default
No flow control
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
When software flow control is set, the default stop and start characters are Ctrl-S and Ctrl-Q (XOFF and XON). You can change them with the stop-character and start-character commands.
If a remote Telnet device requires software flow control, the remote system should not be able to turn it off. Using the lock option makes it possible to refuse "dangerous" Telnet negotiations if they are inappropriate.
Example
The following example sets hardware flow control on line 7:
line 7 flowcontrol hardwareRelated Commands
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
start-character
stop-character
terminal flowcontrol †hold-character
To define the local hold character used to pause output to the terminal screen, use the
hold-character line configuration command. Use the no form of this command to restore the default.hold-character ascii-number
no hold-characterSyntax Description
ascii-number
Either the decimal representation of the hold character or a control sequence (for example, Ctrl-P)
Default
No hold character is defined.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The Break character is represented by zero; NULL cannot be represented. To continue the output, enter any character after the hold character. To use the hold character in normal communications, precede it with the escape character. See the "ASCII Character Set" appendix in the Configuration Fundamentals Command Reference for a list of ASCII characters.
Example
The following example sets the hold character to Ctrl-S, which is decimal 19:
line 8 hold-character 19Related Command
The dagger (†) means that this command is documented in the "Connection Commands" chapter.
terminal hold-character †
insecure
To set the line as an insecure location, use the insecure line configuration command. Use the no form of this command to disable this feature.
insecure
no insecureSyntax Description
This command has no arguments or keywords.
Default
Disabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Example
The following example sets up line 10 as a dial-up line that is used by the LAT software to report the line as available to remote hosts:
line 10insecureipx nasi-server enable
To enable NetWare Asynchronous Services Interface (NASI) clients to connect to asynchronous devices attached to your router, use the ipx nasi-server enable global configuration command. To prevent NASI clients from connecting through a router, use the no form of this command.
ipx nasi-server enable
no ipx nasi-server enableSyntax Description
This command has no arguments or keywords.
Default
NASI is not enabled.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
When you issue this command, NASI clients can connect to any port on the router other than the console port to access network resources. When the user on the NASI client uses the Windows or DOS application to connect to the router, a list of available TTY and VTY lines appears, beginning with TTY1. The user selects the desired outgoing TTY or VTY port.
You can configure TACACS+ security on the router so that after the user selects a TTY or VTY port, a username and password prompt appear for authentication, authorization, and accounting purposes.
Example
The following example shows a minimum configuration to enable NASI client dial-in access with TACACS+ authentication:
ipx routingipx internal-network ncs001interface ethernet 0ipx network 1ipx nasi-server enable! enable TACACS+ authentication for NASI clients using the list name swamiaaa authentication nasi swami tacacs+line 1 8modem inoutRelated Commands
Two daggers (††) indicate that the command is documented in the Security Command Reference.
aaa authentication nasi ††
nasi authentication ††
show ipx nasi connections
show ipx spx-protocollength
To set the terminal screen length, use the length line configuration command.
length screen-length
Syntax Description
screen-length
Number of lines on the screen. A value of zero disables pausing between screens of output.
Default
24 lines
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The Cisco IOS software uses the value of this command to determine when to pause during multiple-screen output. Not all commands recognize the configured screen length. For example, the show terminal command assumes a screen length of 24 lines or more.
Example
The following example illustrates how to disable the screen pause function on the terminal connected to line 6:
line 6 terminal-type VT220 length 0Related Command
This command is documented in the "Connection Commands" chapter, which is indicated by a dagger (†).
terminal length †
line
To identify a specific line for configuration and start the line configuration command collection mode, use the line global configuration command.
line [aux | console | tty | vty] line-number [ending-line-number]
Syntax Description
Default
There is no default line.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
You can address a single line or a consecutive range of lines with the line command. A line number is necessary, though, and you will receive an error message if you forget to include it.
Entering the line command with the optional line type (AUX, CON, TTY, or VTY) designates the line number as a relative line number. For example, to configure line parameters for line 7 (a TTY line), you could enter the following:
Router(config)# line tty 7You also can enter the line command without specifying a line type. In this case, the line number is treated as an absolute line number. For example, to configure line parameters for line 5, which can be of any type, you could enter the following:
Router(config)# line 5Absolute line numbers increment consecutively and can be difficult to manage on large systems. Relative line numbers are a shorthand notation used in configuration. Internally, the Cisco IOS software uses absolute line numbers. You cannot use relative line numbers everywhere, but you can use absolute line numbers everywhere.
The absolute line number of the auxiliary port is 1. The relative line number of the auxiliary port is 0. See the modem line configuration command to set up modem support on the auxiliary port.
The software keeps a table of absolute and relative line numbers that you can display with the EXEC command show users all. A sample display follows:
Router> show users allLine User Host(s) Idle Location 0 con 0 chaff console 1 tty 1 Engineering printer 2 tty 2 3 tty 3 DREGGS 1:07 Katy x1111 4 tty 4 Console E3-D 5 tty 5 Mkt. demo area 6 tty 6 7 tty 7 DREGGS 14 Marie x1112 10 tty 10. . .135 tty 135 136 tty 136 137 tty 137 rp4-printer 140 tty 140 Braille printer 141 aux 0 142 vty 0 Denise idle DENISE-MAC.CISCO.COM 143 vty 1 Michael idle 0 DREGGS.CISCO.COM 144 vty 2 145 vty 3 146 vty 4 147 vty 5The absolute line numbers are listed at the far left, followed by the line type, and then the relative line number. Relative line numbers always begin numbering at zero and define the type of line. Addressing the second virtual terminal line as line vty 1, for example, is easier than remembering it as line 143—its absolute line number.
The line types are ranked as follows in the line table:
1
2
3
4
5
The terminal from which you locally configure the router is attached to the console port. To configure line parameters for the console port, enter the following:
Router(config)# line con 0The console relative line number must be 0.
Virtual terminal lines are used to allow remote access to the router. A virtual terminal line is not associated with either the auxiliary or console port. The router has five virtual terminal lines by default. However, you can create additional virtual terminal lines as described in the section "Create Additional Virtual Terminal Lines" in the "Configuring Terminal Lines and Modem Support" chapter of the Access Services Configuration Guide.
Configuring the console port or virtual terminal lines allows you to perform such tasks as setting communication parameters, specifying autobaud connections, and configuring terminal operating parameters for the terminal you are using.
Examples
To configure virtual terminal line parameters, you would enter the following:
Router(config)# line vty line-number [ending-line-number]The following example starts configuration for virtual terminal lines 0 to 4:
line vty 0 4Related Commands
A dagger (†) indicates that the command is documented outside this chapter.
show line
show users all †location
To record the location of a serial device, use the location line configuration command. Use the no form of this command to remove the description.
location text
no locationSyntax Description
Default
None
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The location command enters information about the device location and status. Use the show users all EXEC command to display the location information.
Example
The following example identifies the location of the console:
line console location Building 3, Basementlockable
To enable the lock EXEC command, use the lockable global configuration command. Use the no form of this command to reinstate the default—the terminal cannot be locked.
lockable
no lockableSyntax Description
This command has no arguments or keywords.
Default
Not lockable
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command allows a terminal to be temporarily inaccessible by use of a temporary password.
This command activates a temporary password, which is set up with the lock EXEC command, so that a terminal is inaccessible.
Example
The following example sets the terminal to the lockable state:
lockableRelated Command
A dagger (†) indicate that the command is documented in the "Connection Commands" chapter of this book.
lock †
login (line)
To enable password checking at login, use the login line configuration command. Use the no form of this command to disable password checking and allow connections without a password.
login [local | tacacs]
no loginSyntax Description
Default
Virtual terminals require a password. If you do not set a password for a virtual terminal, it responds to attempted connections by displaying an error message and closing the connection.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
If you specify the login command without the local or tacacs option, authentication is based on the password specified with the password line configuration command.
Note
Examples
The following example sets the password letmein on virtual terminal line 4:
line vty 4 password letmein loginThe following example illustrates how to enable the TACACS-style user ID and password-checking mechanism:
line 0 password mypassword login tacacsRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
enable password †
password
username †login authentication
To enable AAA/TACACS+ authentication for logins, use the login authentication line configuration command. Use the no form of the command to return to the default.
login authentication [default | list-name]
no login authentication [default | list-name]Syntax Description
default
Uses the default list created with the aaa authentication login command.
list-name
Use the list specified.
Default
Login authentication uses the default set with aaa authentication login command. If no default is set, the local user database is checked. No authentication is performed on the console.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.3.
This command is a per-line command used with AAA authentication and specifies a list of TACACS+ authentication processes that are tried at login. If no list is specified, the default list is used (whether or not it is specified in the command line). Defaults and lists are created with the aaa authentication login command. Note that entering the no version of login authentication has the same effect as entering the command with the default argument.
Before issuing this command, create a list of authentication processes with the aaa authentication login global configuration command.
CautionIf you use a list-name that has not been configured with the aaa authentication login command, you will disable logins on this line.
Examples
The following example specifies that the default AAA authentication is to be used on line 4:
line 4login authentication defaultThe following example specifies that the AAA authentication list called MIS-access is to be used on line 7:
line 7login authentication MIS-accessRelated Command
A dagger (†) indicates that the command is documented outside this chapter.
aaa authentication login †
login-string
To define a string of characters that the Cisco IOS software sends to a host after a successful Telnet connection, use the login-string global configuration command. Use the no form of this command to remove the login string.
login-string hostname d message [%secp] [%secw] [%b] [%m] d
no login-string hostnameSyntax Description
Default
No login strings are defined.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Follow this command with one or more blank spaces and a delimiting character of your choice. Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character. To use a percent sign in the login string, precede it with another percent sign; that is, type the characters "%%." The options can be used anywhere within the message string.
This command applies only to rlogin and Telnet sessions.
Example
In the following example, the value %5p causes a 5-second pause:
login-string office #ATDT 555-1234 %5p hello #logout-warning
To warn users of an impending forced timeout, use the logout-warning line configuration command. Use the no form of this command to restore the default.
logout-warning [number]
Syntax Description
number
(Optional) The number of seconds that are counted down before session termination. If no number is specified, the default of 20 seconds is used.
Default
No warning is sent to the user.
Command Mode
Line Configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.3.
This command notifies the user of an impending forced timeout, set by using the absolute-timeout command, or another method such as ARAP.
Example
The following example sets a countdown value of 30 seconds:
line 5logout-warning 30Related Commands
absolute-timeout
session-timeout
modem answer-timeout
To set the amount of time that the Cisco IOS software waits for the Clear to Send (CTS) signal after raising the data terminal ready (DTR) signal in response to RING, use the modem answer-timeout line configuration command. Use the no form of this command to revert to the default value.
modem answer-timeout seconds
no modem answer-timeoutSyntax Description
Default
15 seconds
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command is useful for modems that take a long time to synchronize to the appropriate line speed.
For more information, see the "Configure Modem Control" section of the "Configuring Terminal Lines and Modem Support" chapter in the Cisco IOS Release 11.2 Access Services Configuration Guide.
Example
The following example sets the timeout interval to 20 seconds for the modem connected to lines 3 through 13:
line 3 13 modem answer-timeout 20Related Commands
modem callin
modem inoutmodem at-mode
To open a directly connected session and enter AT command mode on a Cisco AS5200 access server, which is used for sending AT commands to a manageable modem, use the modem at-mode EXEC command.
modem at-mode slot/modem-port
Syntax Description
slot/modem-port
Slot and modem port number. Remember to include the forward slash (/) when entering this variable.
Default
Disabled
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
Manageable modems return "OK" if the AT command you transmit is successfully enabled. Press Ctrl-C after transmitting an AT command to close the directly connected session.
Note
Example
The following example opens a directly connected session on modem 1/1, enters AT command mode on modem 1/1, and transmits the AT command ATH through the out-of-band port of modem 1/1:
AS5200# modem at-mode 1/1You are now entering AT command mode on modem (slot 1 / port 1).Please type CTRL-C to exit AT command mode.at%vMNP Class 10 V.34/V.FC Modem Rev 1.0/85OKat\sIDLE 000:00:00LAST DIALNET ADDR: FFFFFFFFFFFFMODEM HW: SA 2W United States4 RTS 5 CTS 6 DSR - CD 20 DTR - RIMODULATION IDLEMODEM BPS 28800 AT%G0MODEM FLOW OFF AT\G0MODEM MODE AUT AT\N3V.23 OPR. OFF AT%F0AUTO ANS. ON ATS0=1SERIAL BPS 115200 AT%U0BPS ADJUST OFF AT\J0SPT BPS ADJ. 0 AT\W0ANSWER MESSGS ON ATQ0SERIAL FLOW BHW AT\Q3PASS XON/XOFF OFF AT\X0PARITY 8N ATRelated Command
clear modem at-mode
modem at-mode-permit
To permit a manageable modem installed in a Cisco AS5200 access server to accept a directly connected session (which is required to send AT commands), use the modem at-mode-permit line configuration command. The no form of this command disables permission for modems to accept a direct connection.
modem at-mode-permit
no modem at-mode-permitSyntax Description
This command has no keywords or arguments.
Default
Enabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
After you enter this command, enter the modem at-mode command to enable a directly connected session on the modem. From AT command mode, you can enter AT commands directly from your terminal session.
Refer to the 12-Port Modem AT Command Set and Register Summary publication (part of the Cisco AS5200 documentation set) for a complete list and description of AT commands.
The no modem at-mode-permit command disables a modem from accepting a direct connection, which is useful for ensuring modem security.
Note
Example
The following example permits the modem connected to TTY line 1 to accept a directly connected session:
line 1modem at-mode-permitRelated Commands
clear modem at-mode
modem at-modemodem autoconfigure discovery
To configure a line to discover what kind of modem is connected to the router and to configure that modem automatically, use the modem autoconfigure discovery command. Use the no form of this command to disable the feature.
modem autoconfigure discovery
Syntax Description
This command has no arguments or keywords.
Default
This command has no default.
Command Mode
Line command
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
The modem is identified each time the line is reset. If a modem cannot be detected, the line continues retrying for 10 seconds. Once the modem type is determined, this information remains stored until the modem is recycled or disconnected. Discovery mode is much slower than configuring a line directly.
Each time the modem is reset (every time a chat reset script is executed), a string of commands is sent to the modem, the first one being "return to factory-defaults."
Example
The following example discovers whatever kind of modem is attached to the router:
modem autoconfigure discoveryRelated Command
modem autoconfigure type
To direct a line to attempt to configure the attached modem using the entry for modem-name, use the modem autoconfigure type command. Use the no form of this command to disable the feature.
modem autoconfigure type modem-name
no modem autoconfigure typeSyntax Description
Default
This command has no default.
Command Mode
Line command
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
The modem is reconfigured each time the line goes down.
Example
The following example automatically configures the attached modem using the codex_3260 modemcap entry:
modem autoconfigure type Codex_3260Related Command
modem bad
To remove a modem (installed on a Cisco AS5200 access server), from service and indicate it as suspected or proven to be inoperable, use the modem bad line configuration command. Use the no form of this command to restore a modem to service.
modem bad
no modem badSyntax Description
This command has no keywords or arguments.
Default
Disabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
If you mark a modem as inoperable, it appears as Bad—without the asterisk (*)—in the Status column of the show modem command output. A modem marked inoperable by the modem startup-test command appears as Bad* in the show modem command output. Use the no modem bad command to unmark a modem as Bad* or Bad and restore it for dial-up connection services.
Example
The first part of the following example shows a successful connection between modem 2/1 and modem 2/0, which verifies normal operating conditions between these two modems. However, when modem 2/1 is tested against modem 2/3, the back-to-back modem test fails. Therefore, modem 2/3 is suspected or proven to be inoperable. Modem 2/3 is removed from dial-up services through the use of the modem bad command on line 28.
AS5200# test modem back-to-back 2/1 2/0Repetitions (of 10-byte packets) [1]: 10AS5200#%MODEM-5-B2BCONNECT: Modems (2/1) and (2/0) connected in back-to-back test: CONNECT9600/REL-MNP%MODEM-5-B2BMODEMS: Modems (2/0) and (2/1) completed back-to-back test: success/packets = 20/20AS5200# test modem back-to-back 2/1 2/3Repetitions (of 10-byte packets) [1]: 10AS5200#%MODEM-5-BADMODEMS: Modems (2/3) and (2/1) failed back-to-back test: NOCARRIERAS5200# configure terminalAS5200(config)# line 28AS5200(config-line)# modem badAS5200(config-line)# endRelated Commands
modem startup-test
show modem
test modem back-to-backmodem buffer-size
To configure the size of the history event queue buffer for manageable modems installed in a Cisco AS5200 access server, use the modem buffer-size command.
modem buffer-size number
Syntax Description
Default
100 modem events
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
A large buffer size uses significant amounts of processing memory. If the processing memory is running low, reduce the modem buffer size.
To view modem events, use the show modem log command.
Note
Example
The following example enables each modem in the access server to store 150 modem events:
modem buffer-size 150Related Command
show modem log
modem busyout
To gracefully disable a modem (installed in a Cisco AS5200 access server) from dialing or answering calls, use the modem busyout line configuration command. Use the no form of this command to reenable a modem.
modem busyout
no modem busyoutSyntax Description
This command has no keywords or arguments.
Default
Disabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
The disabling action is not executed until the active modem returns to an idle state. No active connections are interrupted when you use this command.
Example
The following example disables the modem associated with line 1 from dialing and answering calls. You do not specify a slot/modem-port number with this command:
line 1modem busyoutRelated Command
modem shutdown
modem callin
To support dial-in modems that use the data terminal ready (DTR) signal to control the off-hook status of the modem, use the modem callin line configuration command. Use the no form of this command to disable this feature.
modem callin
no modem callinSyntax Description
This command has no arguments or keywords.
Default
No modem control
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
In response to RING, the router raises the DTR signal, which indicates to the modem that it should answer the call. At the end of the session, the Cisco IOS software lowers DTR, which disconnects the modem. This command is useful for older modems that do not support auto answer.
This command uses CTS, whereas newer modem commands in the Cisco IOS software use DSR.
Only use the modem callin command on the ASM terminal server, where hardware flow control is not possible. If you have a more recent device (such as a Cisco 2509 through 2512, Cisco 2520 through 2523, a Cisco AS5100, or Cisco AS5200), use the modem dialin command instead.
For more information, see the "Configure Modem Control" section of the "Configuring Terminal Lines and Modem Support" chapter in the Cisco IOS Release 11.2 Access Services Configuration Guide.
Example
The following example configures lines 10 through 16 for dial-in modems that can run at speeds from 300 to 19,200 bps:
line 10 16 modem callin autobaudRelated Commands
modem answer-timeout
modem inoutmodem callout
To configure a line for reverse connections, use the modem callout line configuration command. Use the no form of this command to disable this feature.
modem callout
no modem calloutSyntax Description
This command has no arguments or keywords.
Default
No modem control
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command supports ports connected to computers that would normally be connected to modems. It causes the access server to act somewhat like a modem.
This command uses CTS and should be used only on access servers that do not support hardware flow control. If you have an access server that is newer than the ASM terminal server (such as a Cisco 2509 through 2512, Cisco 2520 through 2523, a Cisco AS5100, or a Cisco AS5200), use the modem host command instead. The modem callout command uses CTS, whereas the modem host command uses DSR/DCD. If CTS is used for modem control instead of DSR/DCD, it prevents CTS from being used by hardware flow control.
For more information, see the "Configure Modem Control" section of the "Configuring Terminal Lines and Modem Support" chapter in the Cisco IOS Release 11.2 Access Services Configuration Guide.
Example
The following example configures lines 17 through 32 in reverse connection mode to a large terminal switch. By using Telnet to connect to a TCP port on this host, the user gets the next free line in the rotary group.
line 17 32 rotary 1 modem calloutRelated Commands
modem inout
rotarymodemcap edit
To change a modem value that was returned from the show modemcap command, use the modemcap edit command.
modemcap edit modem-name attribute value
Syntax Description
modem-name
Name of the modem whose values are being edited.
attribute
Modem capability, or attribute, as defined by the show modemcap command.
value
The AT command equivalent (such as &F).
Default
This command has no default.
Command Mode
Global command
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
Modemcaps are printed within the configuration file. You can edit them using this command.
Configure one attribute of one modem at a time. See the modem-capability values defined by show modemcap command.
Example
The following example adds the factory default entry, &F, to the configuration file. This entry, and others like it, are stored in a database that is referenced.
modemcap edit Codex_3250 factory-default &FRelated Commands
modemcap entry
To store and compress information about the capability of a specified modem, use the modemcap entry command. Use the no form of this command to disable the feature.
modemcap entry modem-type
Syntax Description
Default
The capability values that exist in the specified modem at the time that the command is issued.
Command Mode
Global Configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
This command displays the capability of the specified modem.
Modemcaps are printed within the configuration file and are intended to be edited using the modemcap edit command. The modemcap entry command does not display values that are not set in the modem.
Use modemcap entry with the show modemcap command to interpret the capability of the specified modem.
Example
The following example shows the modem capability in a Codex_3260:
modemcap entry Codex_3260Related Commands
modem cts-required
The modem printer command replaces the modem cts-required command. Refer to the description of the modem printer command for more information.
modem dialin
To configure a line to enable a modem attached to the router to accept incoming calls only, use the modem dialin line configuration command. Use the no form of this command to disable this feature.
modem dialin
no modem dialinSyntax Description
This command has no arguments or keywords.
Default
Do not permit incoming calls to the modem.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
This command supports modems that can automatically handle telephone line activity, such as answering the telephone after a certain number of rings.
For more information, see the "Configure Modem Control" section of the "Configuring Terminal Lines and Modem Support" chapter in the Cisco IOS Release 11.2 Access Services Configuration Guide.
Example
The following example illustrates how to configure a line for a high-speed modem:
line 5 modem dialinRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
dialer †
modem inout
paritymodem dtr-active
To configure a line to leave data terminal ready (DTR) signals low, unless the line has an active incoming connection or an EXEC process, use the modem dtr-active line configuration command. Use the no form of this command to disable this feature.
modem dtr-active
no modem dtr-activeSyntax Description
This command has no arguments or keywords.
Default
No modem control
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command does not use the carrier detect (CD) signal.
This command can be useful if the line is connected to an external device (for example, a time-sharing system) that must know whether a line is in active use. The modem dtr-active command is similar to the no modem line configuration command.
For more information, see the "Configure Modem Control" section of the "Configuring Terminal Lines and Modem Support" chapter in the Cisco IOS Release 11.2 Access Services Configuration Guide.
Example
The following example illustrates how to configure a line for low DTR:
line 5 modem dtr-activeRelated Command
modem hold-reset
To reset and isolate integrated modems (installed in a Cisco AS5200 access server) for extensive troubleshooting, use the modem hold-reset line configuration command. Use the no form of this command to restart a modem.
modem hold-reset
no modem hold-resetSyntax Description
This command has no keywords or arguments.
Default
Disabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
This command is also used to reset a modem that is frozen in a suspended state. Disable the suspended modem with the modem hold-reset command, and then restart initialization with the no modem hold-reset command.
Example
The following example disables a suspended modem and resets its initialization:
configure terminalline 4modem hold-resetno modem hold-resetRelated Command
modem host
To configure a line for reverse connections where hardware flow control is also required, use the modem host line configuration command. Use the no form of this command to disable the line modem control for reverse connections.
modem host
no modem hostSyntax Description
This command has no arguments or keywords.
Default
No modem control
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
This command supports ports connected to computers that would normally be connected to modems. This command causes the access server to act somewhat like modem.
The modem host command is identical in operation to the modem callout command except that DSR/DCD is used for modem control instead of CTS. This frees CTS for use by hardware flow control.
Example
The following example illustrates how to configure a line to send a DSR/CD active signal to the modem for data switches and hosts:
line 5 modem hostRelated Commands
modem callout
modem printermodem inout
To configure a line for both incoming and outgoing calls, use the modem inout line configuration command. Use the no form of this command to disable this feature.
modem inout
no modem inoutSyntax Description
This command has no arguments or keywords.
Default
No modem control
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command uses DSR and RING signals for carrier detection.
The Cisco IOS software does not support any dialing protocols; therefore, the host system software or the user must provide any special dialing commands when using the modem for outgoing calls.
For more information, see the "Configure Modem Control" section of the "Configuring Terminal Lines and Modem Support" chapter in the Cisco IOS Release 11.2 Access Services Configuration Guide.
Example
The following example illustrates how to configure a line for both incoming and outgoing calls:
line 5 modem inoutRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
dialer †
paritymodem poll retry
To set the maximum number of polling attempts used to retrieve performance statistics from a manageable modem installed on a Cisco AS5200 access server, use the modem poll retry global configuration command.
modem poll retry number
Syntax Description
Default
Three polling attempts
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
Higher settings cause the software to keep polling one modem for status and to avoid polling other modems, which decreases the amount of statistics that are gathered.
Note
Example
The following example configures the server to attempt to retrieve statistics from a local modem up to five times before discontinuing the polling effort:
modem poll retry 5Related Commands
clear modem
modem poll time
modem status-pollmodem poll time
To set the time interval between modem polls (which report modem statistics on a Cisco AS5200), use the modem poll time global configuration command. To restore the default setting of the poll time, use the no form of this command.
modem poll time seconds
no modem poll time secondsSyntax Description
Default
12 seconds
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
This command does not apply to nonmanageable modems.
Example
The following example sets the time interval between polls to 10 seconds:
modem poll time 10Related Commands
modem poll retry
modem status-pollmodem printer
To configure a line to require a data set ready (DSR) signal, use the modem printer line configuration command.
modem printer
no modem printerSyntax Description
This command has no arguments or keywords.
Default
No modem control
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
This command uses RING/DCD (data carrier detect) /DSR as the modem control signal instead of CTS. This leaves CTS free for use in hardware flow control. You can configure hardware flow control concurrently with the modem printer command.
While the modem dialin command supports modems concurrently with hardware flow control, the other auxiliary modem control options for printers, such as modem cts-required, use CTS instead of DSR/CD, as the CD signal.
Example
The following example illustrates how to configure a line to send a DSR signal to the modem:
line 5 modem printermodem recovery-time
To set the maximum amount of time the call-switching module waits for a local modem to respond to a request before it is considered locked in a suspended state, use the modem recovery-time global configuration command. The no form of this command sets a 5-minute response time, which is the default setting.
modem recovery-time minutes
no modem recovery-timeSyntax Description
Default
5 minutes
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
This command applies only to the Cisco AS5200 access server.
Note
After the call-switching module resets a suspended modem, it recovers to a default call switching module state.
Example
The following example configures the call-switching module to wait for 8 minutes:
modem recovery-time 8modem ri-is-cd
The modem dialin command replaces the modem ri-is-cd command. Refer to the description of the modem dialin command for more information.
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
modem shutdown
To abruptly shut down an active or idle modem installed on a Cisco AS5200 access server, use the modem shutdown line configuration command. Use the no form of this command to take the modem out of a shutdown state and place it back in service.
modem shutdown
no modem shutdownSyntax Description
This command has no keywords or arguments.
Default
Disabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
Enable the no modem shutdown command to restore to service a modem that has been shut down.
Example
The following example abruptly shuts down the modem associated with line 2. All active calls on the modem are dropped immediately.
configure terminalline 2modem shutdownRelated Command
modem busyout
modem startup-test
To perform diagnostic testing on each modem during the initial startup of the Cisco AS5200 or during rebooting process, use the modem startup-test global configuration command. Use the no form of this command to disable startup testing.
modem startup-test
no modem startup-testSyntax Description
This command has no keywords or arguments.
Default
Enabled
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
The results of the modem startup test are displayed in the Status column of the show modem command's output. Modems that pass the diagnostic test are marked as Idle, Busy, Downloading, and Reset. Modems that fail the diagnostic test are marked as Bad*. These modems cannot be used for call connections. Depending on how many modems are installed, this diagnostic test may take from 5 to 15 minutes to complete.
Perform additional testing on an inoperative modem by executing the test modem back-to-back command. The no modem startup-test command disables startup testing.
Example
The following example shows how to perform a startup test on the integrated Cisco AS5200 modems:
configure terminalmodem startup-testDisplay the results of the modem startup test after you restart the system by enabling the show modem command.
Related Commands
modem bad
show modem
test modem back-to-backmodem status-poll
To poll for modem statistics through an out-of-band port in a Cisco AS5200 access server, use the modem status-poll line configuration command. Use the no form of this command to disable status polling through the out-of-band port for a specified modem.
modem status-poll
no modem status-pollSyntax Description
This command has no keywords or arguments.
Default
Enabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
This command applies only to manageable modems that have out-of-band ports.
Note
Example
The following example enables modem status polling through the out-of-band port through
TTY line 1:configure terminalline 1modem status-pollRelated Commands
modem poll retry
modem poll timemotd-banner
To display message-of-the-day (MOTD) banners, use the motd-banner line configuration command. Use the no form of this command to suppress the MOTD banners.
motd-banner
no motd-bannerSyntax Description
This command has no arguments or keywords.
Default
Enabled on all lines.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
This command determines whether the router will display the MOTD banner when an EXEC session is created. The MOTD banner is defined with the banner motd command. By default, the MOTD banner is enabled on all lines. Disable the MOTD banner using the no motd-banner command.
The MOTD banners can also be disabled by the no exec-banner line configuration command, which disables both MOTD banners and EXEC banners on a line. If the no exec-banner command is configured on a line, the MOTD banner will be disabled regardless of whether the motd-banner command is enabled or disabled. summarizes the effects of the exec-banner command and the motd-banner command.
Table 5 Banners Displayed
MOTD banner
EXEC banner
None
EXEC banner
None
For reverse Telnet connections, the EXEC banner is never displayed. Instead, the incoming banner is displayed. The MOTD banner is displayed by default, but it is disabled if either the no exec-banner command or no motd-banner command is configured. summarizes the effects of the exec-banner command and the motd-banner command for reverse Telnet connections.
Example
The following example suppresses the MOTD banner on virtual terminal lines 0 to 4:
line vty 0 4no motd-bannerRelated Commands
banner exec
banner incoming
banner motd
exec-bannernotify
To enable terminal notification about pending output from other Telnet connections, use the notify line configuration command. Use the no form of this command to end notification.
notify
no notifySyntax Description
This command has no arguments or keywords.
Default
Disabled
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command sets a line to inform a user who has multiple, concurrent Telnet connections when output is pending on a connection other than the current one.
Example
The following example sets up notification of pending output from connections on virtual terminal lines 0 to 4:
line vty 0 4 notifyRelated Command
This command is documented in the "Connection Commands" chapter, as indicated by
the dagger (†).terminal notify †
padding
To set the padding on a specific output character, use the padding line configuration command. Use the no form of this command to remove padding for the specified output character.
padding ascii-number count
no padding ascii-numberSyntax Description
ascii-number
Decimal representation of the character.
count
Number of NULL bytes sent after that character, up to 255 padding characters in length.
Default
None
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Use this command when the attached device is an old terminal that requires padding after certain characters (such as ones that scrolled or moved the carriage). See the "ASCII Character Set" appendix in the Configuration Fundamentals Command Reference for a list of ASCII characters.
Example
The following example pads a Return (decimal 13) with 25 NULL bytes:
line consolepadding 13 25Related Command
This command is documented in the "Connection Commands" chapter, as indicated by
the dagger (†).terminal padding †
parity
To define generation of a parity bit, use the parity line configuration command.
parity {none | even | odd | space | mark}
Syntax Description
Default
No parity
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Communication protocols provided by devices such as terminals and modems often require a specific parity bit setting.
Example
The following example changes the default of no parity to even parity:
line 34 parity evenRelated Command
This command is documented in the "Connection Commands" chapter, as indicated by
the dagger (†).terminal parity †
password
To specify a password on a line, use the password line configuration command. Use the no form of this command to remove the password.
password password
no passwordSyntax Description
Default
No password is specified.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
When an EXEC process is started on a line with password protection, the EXEC prompts for the password. If the user enters the correct password, the EXEC prints its normal privileged prompt. The user can try three times to enter a password before the EXEC exits and returns the terminal to the idle state.
Example
The following example removes the password from virtual terminal lines 1 to 4:
line vty 1 4 no passwordRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
enable password †
login (line)printer (LPD)
To configure a printer and assign a server TTY line (or lines) to it, use the printer global configuration command. Use the no form of the command to disable printing on a tty line.
printer printer-name {line number | rotary number} [newline-convert | formfeed]
no printerSyntax Description
Default
No printers are defined by default.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.3.
This command enables you to configure a printer for operations and assign either a single TTY line or a group of TTY lines to it. To make multiple printers available through the same printer name, specify the number of a rotary group.
In addition to configuring the printer with the printer command, you must also modify the file /etc/printcap on your UNIX system to include the definition of the remote printer in the Cisco IOS software. Refer to the Access Services Configuration Guide for additional information.
Use the optional newline-convert keyword in UNIX environments that cannot handle single-character line terminators. This converts new-line characters to a carriage-return, linefeed sequence. Use the formfeed keyword when using the lpd protocol to print and your system is unable to separate individual output jobs with a form feed (page eject). You can enter the newline-convert and formfeed keywords together and in any order.
Example
The following example configures a printer named printer1 and assigns its output to the single TTY line 4.
printer printer1 line 4Related Commands
A dagger (†) indicates that the command is documented outside this chapter.
clear line
show printer †private
To save user EXEC command changes between terminal sessions, use the private line configuration command. Use the no form of this command to restore the default condition.
private
no privateSyntax Description
This command has no arguments or keywords.
Default
User-set configuration options are cleared with the EXEC command exit or when the interval set with the exec-timeout line configuration command has passed.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command ensures that the terminal parameters set by the user remain in effect between terminal sessions. This behavior is desirable for terminals in private offices.
Example
The following example sets up virtual terminal line 1 to keep all user-supplied settings at system restarts:
line 15 privateRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
exec-timeout
exit †refuse-message
To define a line-in-use message, use the refuse-message line configuration command. Use the no form of this command to disable the message.
refuse-message d message d
no refuse-messageSyntax Description
d
Delimiting character of your choice—a pound sign (#) for example. You cannot use the delimiting character in the message.
message
Message text.
Default
No line-in-use message is defined.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Follow this command with one or more blank spaces and a delimiting character of your choice. Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character. You cannot use the delimiting character within the text of the message.
When you define a message using this command, the Cisco IOS software does the following:
1
2
3
Example
In the following example, line 5 is configured with a line-in-use message, and the user is instructed to try again later:
line 5refuse-message /The dial-out modem is currently in use.Please try again later./rotary
To define a group of lines consisting of one of more lines, use the rotary line configuration command. Use the no form of this command to remove a line or group of lines from a rotary group.
rotary group
no rotarySyntax Description
Default
None
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Typically, rotary groups are used on devices with multiple modem connections to allow connections to the next free line in a hunt group.
Connections to a rotary group can take advantage of the following features:
•
•
•
•
The remote host must specify a particular TCP port on the router to connect to a rotary group with connections to an individual line. The available services are the same, but the TCP port numbers are different. lists the services and port numbers for both rotary groups and individual lines.
For example, if Telnet protocols are required, the remote host connects to the TCP port numbered 3000 (decimal) plus the rotary group number. If the rotary group identifier is 13, the corresponding TCP port is 3013.
If a raw TCP stream is required, the port is 5000 (decimal) plus the rotary group number. If rotary group 5 includes a raw TCP (printer) line, the user connects to port 5005 and is connected to one of the raw printers in the group.
If Telnet binary mode is required, the port is 7000 (decimal) plus the rotary group number.
Example
The following example establishes a rotary group consisting of virtual terminal lines 2 through 4 and defines a password on those lines. By using Telnet to connect to TCP port 3001, the user gets the next free line in the rotary group. The user does not have to remember the range of line numbers associated with the password.
line vty 2 4 rotary 1 password letmein loginRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
dialer †
modem bad
modem callout
session-timeoutrxspeed
To set the terminal receive speed (how fast the terminal receives information from the modem), use the rxspeed line configuration command.
rxspeed bps
Syntax Description
Default
9600 bps
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Set the speed to match the baud rate of whatever device you have connected to the port. Some baud rates available on devices connected to the port might not be supported on the system. The system will indicate if the speed you select is not supported. Use as a guide for setting the line speeds.
Example
The following example sets the line 5 receive rate to 2400 bps:
line 5 rxspeed 2400Related Commands
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
speed
terminal rxspeed †
txspeedscript activation
To specify that a chat script start on a line any time the line is activated, use the script activation line configuration command. Use the no form of this command to disable this feature.
script activation regexp
no script activationSyntax Description
regexp
Regular expression that specifies the set of modem scripts that might be executed. The first script name that matches the argument regexp will be used.
Default
Not assigned to terminal lines
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command provides an asynchronous handshake to a user or device that activates the line. It can be activated by several events, such as a user issuing a carriage return on a vacant line, by a modem on the line sensing an incoming carrier, or an asynchronous device (such as another router) sending data. Each time an EXEC session is started on a line, the system checks to see if a script activation command is configured on the line. If so, and the argument regexp (a regular expression) matches an existing chat script name, the matched script is run on the line. For more information about regular expressions, refer to the "Regular Expressions" appendix in this publication.
The script activation command can mimic a login handshake of another system. For example, a system that dials into a line on a router and expects an IBM mainframe login handshake can be satisfied with an appropriate activation script.
This command also can send strings to asynchronous devices that are connecting or dialing into a router.
The script activation command functions only on physical terminal (TTY) lines. It does not function on virtual terminal (VTY) lines.
Example
The following example specifies that the chat script with a name that includes telebit will be activated whenever line 4 is activated:
line 4 script activation telebitRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
chat-script †
dialer map modem-script system-script †
dialer map modem-script system-script name †
script activation
script connection
script dialer †
script reset
script startup
start-chatscript arap-callback
To specify that a chat script start on a line any time an AppleTalk Remote Access (ARA) client requests a callback, use the script arap-callback line configuration command. Use the no form of this command to disable this feature.
script arap-callback regexp
no arap-callbackSyntax Description
regexp
Regular expression that specifies the set of modem scripts that might be executed. The first script name that matches the argument regexp is used.
Default
Not assigned to terminal lines
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
This command specifies that if an originating ARA client requests callback, the device will be disconnected and the chat script defined by the argument regexp will be executed to call back the client. The first available line specified for callback, and for which a chat script has been applied, will be used for the callback.
Create a chat script using the chat script command.
The script arap-callback command functions only on physical terminal (TTY) lines. It does not function on virtual terminal (VTY) lines.
Example
The following example specifies that a chat script with a name that includes usr4 will be activated whenever a client requests a callback on line 4:
line 4 script arap-callback usr4Related Commands
A dagger (†) indicates that the command is documented outside this chapter.
chat-script †
script activation
script callback
script connection
script dialer †
script reset
script startup
start-chatscript callback
To specify that a chat script start on a line any time a client requests a callback, use the script callback line configuration command. Use the no form of this command to disable this feature.
script callback regexp
no callbackSyntax Description
regexp
Regular expression that specifies the set of modem scripts that might be executed. The first script name that matches the argument regexp is used.
Default
Not assigned to terminal lines
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
This command specifies that if an originating client requests callback, the device will be disconnected and the chat script defined by the argument regexp will be executed to call back the client. The first available line specified for callback, and for which a chat script has been applied, will be used for the callback.
Create a chat script using the chat script command.
The script callback command functions only on physical terminal (TTY) lines. It does not function on virtual terminal (VTY) lines.
Example
The following example specifies that the chat script with a name that includes supra4 will be activated whenever a client requests a callback on line 4:
line 4 script callback supra4Related Commands
A dagger (†) indicates that the command is documented outside this chapter.
chat-script †
script activation
script connection
script dialer †
script reset
script startup
start-chatscript connection
To specify that a chat script start on a line any time a remote network connection is made to a line, use the script connection line configuration command. Use the no form of this command to disable this feature.
script connection regexp
no script connectionSyntax Description
regexp
Specifies the set of modem scripts that might be executed. The first script name that matches the argument regexp will be used.
Default
Not assigned to terminal lines
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command provides modem dialing commands and commands for logging onto remote systems. The script connection command functions only on physical terminal (TTY) lines. It does not function on virtual terminal (VTY) lines.
This command can be used to initialize an asynchronous device sitting on a line to which a reverse network connection is made.
For information about regular expressions, refer to the "Regular Expressions" appendix in this publication.
Example
The following example specifies that the chat script with a name that includes inband will be activated whenever a remote connection to line 4 is established. The router can send a login string and password to the UNIX server when a network tunneling connection comes into line 4:
line 4 script connection inbandUsing this example and the topology in Figure 2, the Access Server or router can send a login string and password to the UNIX server when a network tunneling connection comes into line 4.
Figure 2 Network Tunneling Connection on an Asynchronous Line
Related Commands
A dagger (†) indicates that the command is documented outside this chapter.
chat-script †
dialer map modem-script system-script †
dialer map modem-script system-script name †
script activation
script dialer †
script reset
script startup
start-chatscript reset
To specify that a chat script start on a line any time the specified line is reset, use the script reset line configuration command. Use the no form of this command to disable this feature.
script reset regexp
no script resetSyntax Description
regexp
Specifies the set of modem scripts that might be executed. The first script name that matches the argument regexp will be used.
Default
Not assigned to terminal lines.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Chat scripts provide modem dialing commands and commands for logging onto remote systems. Use this command to reset a modem attached to a line every time a call is dropped.
The script reset command functions only on physical terminal (TTY) lines. It does not function on virtual terminal (VTY) lines.
For information about regular expressions, refer to the "Regular Expressions" appendix in this publication.
Examples
The following example specifies that any chat script name with the word linebackup in it will be activated any time line 7 is reset:
line 7 script reset linebackupThe following example resets a modem sitting on a line each time a call is dropped:
chat-script drop-line ""+++"" " " ATH OK "ATS0=1" OK "ATS9=21"line 4script reset drop-lineRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
chat-script †
dialer map modem-script system-script †
dialer map modem-script system-script name †
script activation
script connection
script dialer †
script startup
start-chatscript startup
To specify that a chat script start on a line any time the router is powered up, use the script startup line configuration command. Use the no form of this command to disable this feature.
script startup regexp
no script startupSyntax Description
regexp
Specifies the set of modem scripts that might be executed. The first script that matches the argument regexp will be used.
Default
Not assigned to terminal lines
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Use this command to initialize asynchronous devices connected to a line when the router is started up or reloaded. You can also use it to start up a banner other than the default banner on lines. The script startup command functions only on physical terminal (TTY) lines. It does not function on virtual terminal (VTY) lines.
For information about regular expressions, refer to the "Regular Expressions" appendix in this publication.
Example
The following example specifies that a chat script with the word linestart in its name will be activated whenever line 5 is started up:
line 5 script startup linestartRelated Commands
A dagger (†) indicates that the command is documented outside this chapter.
chat-script †
dialer map modem-script system-script †
dialer map modem-script system-script name †
script activation
script connection
script dialer †
script reset
start-chatservice exec-callback
To enable the Cisco IOS software to call back clients who request a callback from the EXEC level, use the service exec-callback global configuration command.
service exec-callback
Syntax Description
This command has no arguments or keywords.
Default
Callback is not enabled.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
This command enables the Cisco IOS software to return a call to a device that dials in, connects to the EXEC, and requests callback.
Example
The following example enables EXEC level callback:
service exec-callbackRelated Commands
A dagger (†) indicates that the command is documented outside this chapter. Two daggers (††) indicate that the command is documented in the Debug Command Reference.
arap callback †
callback forced-wait
debug callback ††
debug confmodem ††
ppp callback †
username †service linenumber
To configure the Cisco IOS software to display line number information after the EXEC or incoming banner, use the service linenumber global configuration command. Use the no form of this command to disable this function.
service linenumber
no service linenumberSyntax Description
This command has no arguments or keywords.
Default
Disabled
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
With the service linenumber command, you can have the Cisco IOS software display the host name, line number, and location each time an EXEC process is started, or an incoming connection is made. The line number banner appears immediately after the EXEC banner or incoming banner. This feature is useful for tracking problems with modems, because the host and line for the modem connection are listed. Modem type information can also be included.
Example
The following example illustrates the type of line number information that can appear after the EXEC banner:
user1@location1%telnet cs2 2001Trying 131.109.44.37Connected to user1-gw.cisco.comEscape character is `^]'.cs1 line 1 virtual terminal 0Related Command
A dagger (†) indicates that the command is documented outside this chapter.
show users †
session-limit
To set the maximum number of terminal sessions per line, use the session-limit line configuration command. Use the no form of this command to remove any specified session limit.
session-limit session-number
no session-limitSyntax Description
Default
The default and set session limits are displayed with the show terminal EXEC command.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Example
The following example limits the number of sessions to eight on a ten-line range:
line 2 12 session-limit 8Related Command
line vty
session-timeout
To set the interval for closing the connection when there is no input or output traffic, use the session-timeout line configuration command. Use the no form of this command to remove the timeout definition.
session-timeout minutes [output]
no session-timeoutSyntax Description
Default
The default interval is zero, indicating the router maintains the connection indefinitely.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command sets the interval that the Cisco IOS software waits for traffic before closing the connection to a remote computer and returning the terminal to an idle state. If only session timeout is the specified command, the session timeout interval is based solely on detected input from the user. If session-timeout output is the specified command, the interval is based on input and output traffic. You can specify a session timeout on each port.
Examples
The following example sets an interval of 20 minutes and specifies that the timeout is subject to traffic detected from the user (input only):
line 5 session-timeout 20The following example sets an interval of 10 minutes, subject to traffic on the line in either direction:
line 5 session-timeout 10 outputshow ipx nasi connections
To show the status of NetWare Asynchronous Services Interface (NASI) connections, use the show ipx nasi connections EXEC command.
show ipx nasi connections
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
Sample Display
The following is sample output from the show ipx nasi connections command:
cs-nasi# sh ipx nasi connectionsNASI Remote: A001500::0020.afe5.3ec5:626C Local: ACBB::0000.0000.0001:2010flags 0NASI Remote: A001500::0020.afe5.3ec5:6E6C Local: ACBB::0000.0000.0001:20D0flags 0Connected to line 2 incount 0 outcount 0 OVF 0The following sample display shows an incoming NASI connection on TTY line 2:
cs-nasi# show usersLine User Host(s) Idle Location* 0 con 0 idle 12 tty 2 chris incoming 1 A001500.0020.afe5.3ec5Table 9 describes fields from the show ipx nasi connections sample display.
Related Commands
ipx nasi-server enable
show ipx spx-protocolshow ipx spx-protocol
To view the status of the SPX protocol stack and related counters, use the show ipx spx-protocol command.
show ipx spx-protocol
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
Sample Display
The following is sample output from the show ipx spx-protocol command:
2509>show ipx spx-protocolNext wake time:SPX socket: 1D90state: 0 Connections: 2SPX Remote: A001500::0000.c047.ed5a:3A80 Local: ACBB::0000.0000.0001:2010state 1 flags 1Queue counts: inq 0, outQ 0, unackedQ 0Sequence: 34, Ack: 34, local-alloc: 39, remote-alloc: 35Abort Timer fires in 24 secsVerify Watchdog Timer fires in 3 secsSPX Remote: A001500::0000.c047.ed5a:C980 Local: ACBB::0000.0000.0001:2900state 1 flags 1Queue counts: inq 0, outQ 0, unackedQ 0Sequence: 111, Ack: 55, local-alloc: 60, remote-alloc: 112Abort Timer fires in 27 secsVerify Watchdog Timer fires in 0 secsTable 10 describes significant fields from this sample display.
Related Commands
A dagger (†) indicates that the command is documented outside this publication.
aaa authentication nasi †
ipx nasi-server enable
nasi authentication 103 †
show ipx nasi connectionsshow line
To display a terminal line's parameters, use the show line EXEC command.
show line [line-number]
Syntax Description
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Sample Display
The following sample output from the show line command shows that line 17 is a virtual terminal line with a transmit and receive rate of 9600 bps. Also shown is the modem state, terminal screen width and length, and so on.
Router# show line 17Tty Typ Tx/Rx A Modem Roty AccO AccI Uses Noise OverrunsA 17 VTY 9600/9600 - - - - - 1 0 0/0Line 17, Location: "", Type: ""Length: 24 lines, Width: 80 columnsBaud rate (TX/RX) is 9600/9600Status: Ready, Connected, Active, No Exit Banner, Async interface activeCapabilities: Line usable as async interfaceModem state: ReadySpecial Chars: Escape Hold Stop Start Disconnect Activation^^x none - - noneTimeouts: Idle EXEC Idle Session Modem Answer Session Dispatchnever never none not setSession limit is not set.Time since activation: neverEditing is enabled.History is enabled, history size is 10.Full user help is disabledAllowed transports are lat telnet rlogin mop. Preferred is lat.No output characters are paddedNo special data dispatching charactersLine is running SLIP routing for address 1.0.0.2.0 output packets queued, 0 input packets.Group codes: 0describes the fields in the show line output.
show modem
To show modem performance statistics on a Cisco AS5200 access server, enable the show modem EXEC command.
show modem [csm | log] [slot/modem-port | group number] [summary | at-mode]
Syntax Description
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
The keywords log, summary, and at-mode apply only to manageable modems.
The number of events that you can record and view with the show modem log command is defined using the modem buffer-size command. The events stored in the buffer wrap around the event queue. You cannot clear the modem event queue.
Use the clear modem counters command to reset modem counters and clear the modem summary report of modem statistics.
Sample Displays
The following display shows output information for the show modem command:
AS5200# show modemInc calls Out calls Busied Failed No SuccMdm Usage Succ Fail Succ Fail Out Dial Answer Pct.1/0 0% 0 0 0 0 0 0 0 0%1/1 0% 0 0 0 0 0 0 0 0%1/2 0% 0 0 0 0 0 0 0 0%1/3 0% 0 0 0 0 0 0 0 0%describes the fields in the previous display.
The following example shows the statistics and current configurations for the manageable modem 1/1. A dash (-) indicates a field that is not available on nonmanageable modems. An x indicates a field that is available and active on manageable modems.
AS5200# show modem 1/1Mdm Typ Status Tx/Rx G Duration TX RX RTS CTS DSR DCD DTR1/1 V34 Idle 1200/1200 0 01:39:59 x x x x x x xModem 1/1, AS5200 Manageable ModemFirmware (Boot) Rev: 1.0.1 (0.0.2)Modem config: Incoming and OutgoingProtocol: Normal, Compression: NoneManagement config: status and AT session pollingTX signals: -17 dBm, RX signals: -33 dBmLast clearing of "show modem" counters 00:11:340 incoming completes, 0 incoming failures,0 outgoing completes, 0 outgoing failures,0 failed dial attempts, 0 ring no answers, 0 busied outs0 no dial tones, 0 dial timeouts, 0 watchdog timeouts0 no carriers, 0 link failures, 0 resets0 protocol timeouts, 0 protocol errors, 0 lost eventsConnection Speeds 75 300 600 1200 2400 4800# of connections 0 0 0 0 0 0Connection Speeds 7200 9600 12000 14400 16800 19200# of connections 0 0 0 0 0 0Connection Speeds 21600 24000 26400 28800 31200 33600# of connections 0 0 0 0 0 0describes the fields in the previous display.
The following example displays example output for a nonmanageable modem. Notice that unavailable fields are marked with dashes (—).
AS5200# show modem 1/1Mdm Typ Status Tx/Rx G Duration TX RX RTS CTS DSR DCD DTR1/1 - Idle 19200/19200 0 00:01:05 - - - - - - -Modem 1/1, AS5200 Non-Manageable ModemFirmware (Boot) Rev: UnknownModem config: UnknownManagement config: Not Manageable ModemLast clearing of "show modem" counters never- incoming completes, - incoming failures- outgoing completes, - outgoing failures,0 failed dial attempts, 0 ring no answers, 0 busied outs0 no dial tones, 0 dial timeouts, 0 watchdog timeouts- no carriers, - link failures, 0 resets- protocol timeouts, - protocol errors, - lost eventsConnection Speeds 75 300 600 1200 2400 4800# of connections 0 0 0 0 0 0Connection Speeds 7200 9600 12000 14400 16800 19200# of connections 0 0 0 0 0 0Connection Speeds 21600 24000 26400 28800 31200 33600# of connections 0 0 0 0 0 0The following example displays the call switching module information for modem 1/2:
AS5200# show modem csm 1/2MODEM_INFO: slot 1, port 2, unit 130, modem_mask=0x0004, modem_port_offset=0tty_hwidb=0x00000000, modem_tty=0x004370A8, mgmt_tty=0x004370A8, modem_pool=0x0041D99Ccsm_status(0): CSM_STATUS_UNLOCKEDcsm_state(0x00000000)=CSM_OC_STATE, csm_event_proc=0x0005B448invalid_event_count=0, wdt_timeout_count=0wdt_timestamp_started is not activatedwait_for_dialing:False, wait_for_bchan:Falsepri_chnl=TDM_ISDN_STREAM(s0, c0), modem_chnl=TDM_ISDN_STREAM(s0, c0)dchan_idb_start_index=0, dchan_idb_index=0, call_id=0x0000, bchan_num=0csm_event=CSM_EVENT_NONE, cause=0x0000, phone_num=ring_indicator=0, oh_state=0, oh_int_enable=0, modem_reset=0ring_no_answer=0, ic_failure=0, ic_complete=0dial_failure=0, oc_failure=0, oc_complete=0oc_busy=0, oc_no_dial_tone=0, oc_dial_timeout=0remote_link_disc=0, busyout=0, modem_reset=0call_duration_started=00:00:00, call_duration_ended=00:00:00, total_call_duration=00:00:00The calling party phone number = 4082968388The called party phone number = 4085267406describes the most useful fields in the previous display.
The following example shows the event log status for a manageable modem and identifies the time elapsed since each modem event was performed (for example, 01:02:41 means the modem event occurred 1 hour, 2 minutes, and 41 seconds ago):
AS5200# show modem log 1/1Modem 1/1 Events Log:00:02:41: Startup Response: Brasil ModemModem (boot) firmware = 1.0.23 (1.0.5)00:02:41: Control Reply: 0xFE0100:02:41: RS232 event:RTS=On, DTR=Off, CTS=OnDSR=On, DCD=On, RI=Off, TST=Offchanges: RTS=No change, DTR=Changed, CTS=Changedchanges: DSR=Changed, DCD=Changed, RI=No change, TST=No change00:02:41: Modem Activity event: Data Active00:02:41: RS232 event:RTS=On, DTR=Off, CTS=OnDSR=On, DCD=On, RI=Off, TST=Offchanges: RTS=No change, DTR=No change, CTS=No changechanges: DSR=No change, DCD=No change, RI=No change, TST=No change00:02:42: Modem State event: Idle00:02:42: End connection event: Retransmits for MNP block (TX/RX) = 0/0Duration = 0:00:00, Number of TX/RX char = 0/0Local Disc Reason = Unknown, Remote Disc Reason = Unknown00:02:29: DTR event: DTR On00:02:29: RS232 event:RTS=On, DTR=On, CTS=OnDSR=On, DCD=On, RI=Off, TST=Offchanges: RTS=No change, DTR=Changed, CTS=No changechanges: DSR=No change, DCD=No change, RI=No change, TST=No change00:02:34: ISDN outgoing called number: 1666420000:02:34: Modem State event: Dialing/Answering00:02:22: Modem State event: Waiting for Carrier00:01:58: Modem State event: Connected00:01:58: Connection event: TX/RX Speed = 26400/26400, Modulation = V34Direction = Originate, Protocol = reliable/MNP, Compression = V42bis00:01:58: Modem Analog signal event: TX = -13, RX = -14, Signal to noise = -4000:01:58: RS232 event:RTS=On, DTR=On, CTS=OnDSR=On, DCD=Off, RI=Off, TST=Offchanges: RTS=No change, DTR=No change, CTS=No changechanges: DSR=No change, DCD=Changed, RI=No change, TST=No change00:00:57: Modem State event: Disconnecting00:00:57: Modem Activity event: Data Active00:00:57: End connection event: Retransmits for MNP block (TX/RX) = 0/0Duration = 0:00:59, Number of TX/RX char = 30/2061Local Disc Reason = Remote Link Disc, Remote Disc Reason = DTR Drop00:00:57: Modem State event: IdleThe following example shows the cumulative system statistics for all manageable modems on the access server:
AS5200# show modem summaryIncoming calls Outgoing calls Busied Failed No SuccUsage Succ Fail Avail Succ Fail Avail Out Dial Ans Pct.5% 2 0 12 0 0 0 0 0 0 100%describes the fields in the previous display.
The following example shows the sample display for modem group 1, which is composed of modem 1/0 through modem 1/23:
AS5200# show modem group 1Incoming calls Outgoing calls Busied Failed No SuccGrp Usage Succ Fail Avail Succ Fail Avail Out Dial Ans Pct.1 0% 0 0 24 0 0 24 0 0 0 0%Modem Group 1: 1/0, 1/1, 1/2, 1/3, 1/4, 1/5, 1/6, 1/7, 1/8, 1/9, 1/10, 1/11, 1/12, 1/13, 1/14, 1/15, 1/16, 1/17, 1/18, 1/19, 1/20, 1/21, 1/22, 1/23The following example shows all the directly connected sessions currently using the internal out-of-band ports on the integrated manageable modems:
AS5200# show modem at-modeActive AT-MODE management sessions:Modem User's Terminal1/1 0 cty 0show modemcap
To display the values set for the current modem, use the show modemcap command. This display lists the modems for which the router has entries. To display the attributes associated with a specific modem, use the show modemcap modem-name command.
show modemcap modem-name
Syntax Description
Default
The list of modems for which the router has entries.
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
When a modem name is supplied, this command displays the available modem values. identifies the list of attributes and their description:
As an alternative to repeatedly entering the same data, use templates as a way to join modemcap entries. For example, consider the following modemcap entries:
modemcap entry gv_basics:FD=&F:AA=S0=1:CD=&C1:DTR=&D2:NEC=E0:NRS=Q1modemcap entry global_village:HFL=&K3\\X1:BCP=%C1:NCP=%C0:TPL=gv_basicsmodemcap entry gv_teleport:NCP=%C0:TPL=gv_basicsTo look up the factory default for a global_village modem, perform the following steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Example
The following example shows the modem values in a Codex_3260:
show modemcap Codex_3260Related Commands
show terminal
To obtain information about the terminal configuration parameter settings for the current terminal line, use the show terminal EXEC command.
show terminal
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Sample Display
The following is sample output from the show terminal command:
Router# show terminalLine 2, Location: "", Type: ""Length: 24 lines, Width: 80 columnsBaud rate (TX/RX) is 9600/9600Status: Ready, Active, No Exit BannerCapabilities: EnabledModem state: ReadySpecial Chars: Escape Hold Stop Start Disconnect Activation^^x none - - noneTimeouts: Idle EXEC Idle Session Modem Answer Session Dispatchnever never 0:00:15 not imp not setSession limit is not set.Allowed transports are telnet rlogin. Preferred is telnetNo output characters are paddeddescribes the fields in the first three lines of show terminal output.
The following line of output indicates the status of the line:
Status: Ready, Active, No Exit Bannerdescribes possible values for the Status field.
The following line of output indicates the status of the capabilities of the line. These capabilities correspond closely to configurable parameters that can be set using configuration commands.
Capabilities: Enableddescribes possible values for the Capabilities field.
The following line of output indicates the modem state. Possible values include Autobauding, Carrier Dropped, Hanging Up, Idle, and Ready.
Modem state: ReadyThe following lines of output indicate the special characters that can be entered to activate various terminal operations. The none or hyphen (-) values imply that no special characters are set.
Special Chars: Escape Hold Stop Start Disconnect Activation^^x none - - noneThe following lines of output indicate the timeout values that have been configured for the line:
Timeouts: Idle EXEC Idle Session Modem Answer Session Dispatchnever never 0:00:15 not imp not setdescribes the fields in the preceding lines of output.
The following lines of output indicate how various options have been configured:
Session limit is not set.Allowed transports are telnet rlogin. Preferred is telnetNo output characters are paddedspecial-character-bits
To configure the number of data bits per character for special characters such as software flow control characters and escape characters, use the special-character-bits line configuration command.
special-character-bits {7 | 8}
Syntax Description
7
Selects the 7-bit ASCII character set.
8
Selects the full 8-bit character set for special characters.
Default
7-bit ASCII character set
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Setting the special character bits to 8 allows you to use twice as many special characters as with the 7-bit ASCII character set. The special characters affected by this setting are the escape, hold, stop, start, disconnect, and activation characters.
Example
The following example allows the full 8-bit international character set for special characters on line 5:
line 5special-character-bits 8Related Commands
The commands followed by a dagger (†) are documented in the "Connection Commands" chapter.
default-value exec-character-bits
default-value special-character-bits
exec-character-bits
terminal exec-character-bits †
terminal special-character-bits †speed
To set the terminal baud rate, use the speed line configuration command. This command sets both the transmit (to terminal) and receive (from terminal) speeds.
speed bps
Syntax Description
Default
9600 bps
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Set the speed to match the transmission rate of whatever device you have connected to the port. Some baud rates available on devices connected to the port might not be supported on the router. The router indicates whether the speed you selected is not supported. Use Table 21 as a guide for setting line speeds.
Example
The following example sets lines 1 and 2 on a Cisco 2509 access server to 115200 bps:
line 1 2 speed 115200Related Commands
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
rxspeed
terminal speed †
txspeedstart-character
To set the flow control start character, use the start-character line configuration command. Use the no form of this command to remove the character.
start-character ascii-number
no start-characterSyntax Description
Default
Decimal 17
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command defines the character that signals the start of data transmission when software flow control is in effect. See the "ASCII Character Set" appendix in the Configuration Fundamentals Command Reference for a list of ASCII characters.
Example
The following example changes the start character to Ctrl-B, which is decimal 2:
line 2 start-character 2Related Commands
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
flowcontrol
stop-character
terminal start-character †start-chat
To specify that a chat script start on a specified line at any point, use the start-chat privileged EXEC command. Use the no form of this command to stop the chat script.
start-chat regexp [line-number [dialer-string]]
no start-chatSyntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command provides modem dialing commands for a chat script that you want to apply immediately to a line. If you do not specify a line, the script runs on the current line. If the specified line is already in use, the script is not activated and an error message appears.
The argument regexp is used to specify the name of the modem script that is to be executed. The first script that matches the argument in this command and the dialer map command will be used. For more information about regular expressions, refer to the "Regular Expressions" appendix in this publication.
This command functions only on physical terminal (TTY) lines. It does not function on virtual terminal (VTY) lines.
Example
The following example forces a dialout on line 8 using the script telebit:
Cisco2509# start-chat telebit line 8Related Commands
A dagger (†) indicates that the command is documented outside this chapter.
chat-script †
dialer map modem-script system-script †
dialer map modem-script system-script name †
script activation
script connection
script dialer †
script reset
script startupstate-machine
To specify the transition criteria for the state of a particular state machine, use the state-machine global configuration command.
state-machine name state firstchar... lastchar [nextstate | transmit]
Syntax Description
name
Specifies the name for the state machine (used in the dispatch-machine line command). The user can specify any number of state machines, but each line can have only one state machine associated with it.
state
Defines which state is being modified. There are a maximum of eight states per state machine. Lines are initialized to state 0 and return to state 0 after a packet is transmitted.
firstchar... lastchar
Specify a range of characters. If the state machine is in the indicated state, and the next character input is within this range, the process goes to the specified next state. Full 8-bit character comparisons are done, so the maximum value is 255. Take care that the line is configured to strip parity bits (or not generate them), or duplicate the low characters in the upper half of the space.
nextstate
(Optional) Defines the state to enter if the character is in the specified range.
transmit
(Optional) Causes the packet to be transmitted and the state machine to be reset to state 0. Recurring characters that have not been explicitly defined to have a particular action return the state machine to state 0.
Default
No transition criteria are specified.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command is paired with the dispatch-machine line configuration command, which defines the line on which the state machine is effective.
Example
The following example uses a dispatch machine named function to ensure that the function key characters on an ANSI terminal are lumped together in one packet. Because the default in the example is to remain in state 0 without transmitting anything, normal key signals are transmitted immediately.
line 1 20dispatch-machine function!state-machine function 0 0 255 transmitRelated Commands
dispatch-character
dispatch-machine
dispatch-timeoutstopbits
To set the number of the stop bits transmitted per byte, use the stopbits line configuration command.
stopbits {1 | 1.5 | 2}
Syntax Description
Default
2 stop bits
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Communication protocols provided by devices such as terminals and modems often require a specific stop bit setting.
Example
The following example changes the default from 2 stop bits to 1 as a performance enhancement:
line 4 stopbits 1Related Commands
This command is documented in the "Connection Commands" chapter, as indicated by
the dagger (†).terminal stopbits †
stop-character
To set the flow control stop character, use the stop-character line configuration command. Use the no form of this command to remove the character.
stop-character ascii-number
no stop-characterSyntax Description
Default
Decimal 19
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command defines the character that signals the end of data transmission when software flow control is in effect. See the "ASCII Character Set" appendix in the Configuration Fundamentals Command Reference for a list of ASCII characters.
Example
The following example changes the stop character to Ctrl-E, which is decimal 5:
line 3 stop-character 5Related Commands
The command followed a dagger (†) is documented in the "Connection Commands" chapter.
flowcontrol
start-character
terminal stop-character †terminal-queue entry-retry-interval
To change the retry interval for a terminal port queue, use the terminal-queue global configuration command. Use the no form of this command to restore the default terminal port queue interval.
terminal-queue entry-retry-interval interval
no terminal-queueSyntax Description
Default
60 seconds
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
If a remote device (such as a printer) is busy, the connection attempt is placed in a terminal port queue. If you want to decrease the waiting period between subsequent connection attempts, decrease the default of 60 to an interval of 10 seconds. Decrease the time between subsequent connection attempts when, for example, a printer queue stalls for long periods.
Example
The following example changes the terminal port queue retry interval from the default of 60 seconds to 10 seconds:
terminal-queue entry-retry-interval 10terminal-type
To specify the type of terminal connected to a line, use the terminal-type line configuration command. Use the no form of this command to remove any information about the type of terminal and reset the line to the default terminal emulation.
terminal-type {terminal-name | terminal-type}
no terminal-typeSyntax Description
Default
VT100
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command records the type of terminal connected to the line. The argument terminal-name provides a record of the terminal type and allows terminal negotiation of display management by hosts that provide that type of service.
For TN3270 applications, this command must follow the corresponding ttycap entry in the configuration file.
Example
The following example defines the terminal on line 7 as a VT220:
line 7 terminal-type VT220Related Commands
These commands are documented in the "Connection Commands" chapter, as indicated by
the dagger (†).terminal keymap-type †
terminal terminal-type †test modem back-to-back
To diagnose a modem that may not be functioning properly in a Cisco AS5200 access server, use the test modem back-to-back EXEC command.
test modem back-to-back {first-slot/modem-number} {second-slot/modem-number}
Syntax Description
Default
Disabled
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
Use this command to perform back-to-back testing of two modems. You might need to enable this command on several different combinations of modems to determine which one is not functioning properly.
Example
The following example shows how to perform a back-to-back modem test between modem 2/0 and modem 2/1 and removes modem 2/1 (which is associated with TTY line 26) from all dial-in and dial-out services:
AS5200# test modem back-to-back 2/0 2/1back2back 2/0 2/1Repetitions (of 10-byte packets) [1]:AS5200#%MODEM-5-B2BCONNECT: Modems (2/0) and (2/1) connected in back-to-back test: CONNECT9600/REL-MNPM%MODEM-5-B2BMODEMS: Modems (2/0) and (2/1) completed back-to-back test: success/packets = 2/2Related Command
modem bad
transport input
To define which protocols to use to connect to a specific line of the router, use the transport input line configuration command.
transport input {all | lat | mop | nasi | none | pad | rlogin | telnet | v120}
Syntax Description
Default
No protocols allowed on the line (none)
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0. The lat, pad, all, and v120 keywords first appeared in Cisco IOS Release 11.1. The none option became the default in Cisco IOS Release 11.1. Originally, the default was all, and this keyword restores the pre-Cisco IOS Release 11.1 defaults.
CautionCisco routers do not accept incoming network connections to asynchronous ports (TTY lines) by default. You have to specify an incoming transport protocol, or specify transport input all before the line will accept incoming connections. For example, if you are using your router as a terminal server to make console-port connections to routers or other devices, you will not be able to use Telnet to connect to these devices. You will receive the message "Connection Refused." This behavior is new as of Cisco IOS Software release 11.1. Previous to release 11.1, the default was transport input all. If you are upgrading to Cisco IOS software version 11.1(1) or later from Cisco IOS Software release 11.0 or earlier, you must add the transport input {protocol | all} command, or you will be locked out of your router.
The process of using Telnet to make a connection out of an asynchronous port is referred to as reverse Telnet. For more information, refer to the section "Configure a Reverse Connection" in the "Configuring Terminal Lines and Modem Support" chapter of the Access Services Configuration Guide.
You can specify one protocol, multiple protocols, all protocols, or no protocols. To specify multiple protocols, enter the keyword for each protocol, separated by a space.
This command can be useful in distributing resources among different types of users, or making certain that only specific hosts can access a particular port. When using two-step protocol translation, the transport input command is useful in controlling exactly which protocols can be translated to other protocols.
Access lists for each individual protocol can be defined in addition to the allowances created by the transport input command. Any settings made with the transport input command override settings made with the transport preferred command.
Example
The following example sets the incoming protocol to Telnet for vtys 0 to 32:
line vty 0 32transport input telnetRelated Commands
A dagger (†) indicates the command is documented in the "Connection Commands" chapter.
terminal transport input †
transport output
transport preferredtransport output
To determine the protocols that can be used for outgoing connections from a line, use the transport output line configuration command.
transport output {all | lat | mop | nasi | none | pad | rlogin | telnet | v120}
Syntax Description
Default
Telnet
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0. The all, lat, pad, rlogin, and v120 commands first appeared in IOS Release 11.1.
You can specify one protocol, multiple protocols, all protocols, or no protocols. To specify multiple protocols, enter the keyword for each protocol, separated by a space.
Any settings made with the transport output command override settings made with the transport preferred command.
Example
The following example prevents any protocol selection:
transport output noneRelated Commands
A dagger (†) indicates the command is documented in the "Connection Commands" chapter.
terminal transport output †
transport input
transport preferredtransport preferred
To specify the transport protocol that the Cisco IOS software uses if the user does not specify one when initiating a connection, use the transport preferred line configuration command.
transport preferred {lat | mop | nasi | none | pad | rlogin | telnet | v120}
Syntax Description
Default
Telnet
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0. The lat, pad, and rlogin commands first appeared in Cisco IOS Release 11.1.
Specify transport preferred none to prevent errant connection attempts.
Any settings made with the transport input or transport output commands override settings made with the transport preferred command.
Example
The following example sets the preferred protocol to Telnet on physical terminal line 1:
line tty 1transport preferred telnetRelated Commands
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
terminal transport preferred †
transport input
transport outputtxspeed
To set the terminal transmit speed (how fast the terminal sends information to the modem), use the txspeed line configuration command.
txspeed bps
Syntax Description
Default
9600 bps
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
Set the speed to match the baud rate of whatever device you have connected to the port. Some baud rates available on devices connected to the port might not be supported on the router. The Cisco IOS software will indicate if the speed you select is not supported. Use as a guide for setting the line speeds.
Example
The following example sets the transmit speed for line 5 to 2400 bps:
line 5 txspeed 2400Related Commands
The command followed by a dagger (†) is documented in the "Connection Commands" chapter.
rxspeed
speed
terminal txspeed †vacant-message
To display an idle terminal message, use the vacant-message line configuration command. Use the no form of this command to remove the default vacant message or any other vacant message that may have been set.
vacant-message [d message d]
no vacant-messageSyntax Description
Default
The format of the default vacant message is as follows:
<blank lines> hostname tty# is now available <blank lines> Press RETURN to get started.This message is generated by the system.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
This command enables the banner to be displayed on the screen of an idle terminal. The vacant-message command without any arguments restores the default message.
Follow this command with one or more blank spaces and a delimiting character of your choice. Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character.
Note
Example
The following example turns on the system banner and displays this message:
line 0vacant-message #Welcome to Cisco Systems, Inc.Press Return to get started.width
To set the terminal screen width, use the width line configuration command. This command sets the number of character columns displayed on the attached terminal.
width characters
Syntax Description
Default
80 character columns
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0.
The rlogin protocol uses the characters argument to set up terminal parameters on a remote host.
Some hosts can learn the values for both length and width specified with the line and width commands.
Example
The following example changes the character columns to 132 for the terminal on line 7:
line 7 location console terminal width 132Related Command
The following command is documented in the "Connection Commands" chapter, as indicated by the dagger (†).
terminal width †
