Cisco IOS XR System Management Command Reference for the Cisco XR 12000 Series Router, Release 4.0
Terminal Services Commands on the Cisco IOS XR Software
Downloads: This chapterpdf (PDF - 1.64MB) The complete bookPDF (PDF - 8.04MB) | Feedback

Terminal Services Commands on the Cisco IOS XR Software

Terminal Services Commands on the Cisco IOS XR Software

This chapter describes the Cisco IOS XR commands used for setting up physical and virtual terminal connections, managing terminals, and configuring virtual terminal line (vty) pools.

For detailed information about configuring physical and virtual terminals, see the Implementing Physical and Virtual Terminals on Cisco IOS XR Software module in Cisco IOS XR System Management Configuration Guide for the Cisco XR 12000 Series Router.

absolute-timeout

To set the absolute timeout for line disconnection, use the absolute-timeout command in line template configuration mode. To remove the absolute-timeout command from the configuration file and restore the system to its default condition, use the no form of this command.

absolute-timeout minutes

no absolute-timeout minutes

Syntax Description

minutes

Absolute timeout interval, in minutes. Range is from 10 to 10000.

Command Default

minutes: 1440

Command Modes

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the absolute-timeout command to terminate the connection after the specified time 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 notified 20 seconds before the session is terminated.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the session timeout value to 2880 minutes (2 days) for the default line template:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# absolute-timeout 2880
                     

Related Commands

Command

Description

banner incoming

Sets the idle wait timeout interval for user input over a physical terminal connection.

session-timeout

Sets the idle wait timeout interval for user input over a virtual terminal connection.

access-class

To restrict incoming and outgoing connections using an IPv4 or IPv6 access list, use the access-class command in line template configuration mode. To remove the restriction, use the no form of this command.

access-class list-name { in | out }

no accessclass list-name { in | out }

Syntax Description

list-name

IPv4 or IPv6 access list name.

in

Filters incoming connections.

out

Filters outgoing connections.

Command Default

No access class is set.

Command Modes

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the access-class command to restrict incoming or outgoing connections to addresses defined in an access list. Use the ipv4 access-list or ipv6 access-list command to define an access list by name.


Note


To restrict access of incoming or outgoing connections over IPv4 and IPv6, the IPv4 access list and IPv6 access list must share the same name.


Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to specify an access class assigned to outgoing connections for the default line template:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# access-class vtyacl out
                     

The following sample output from the show ipv4 access-lists command displays the IPv4 access list named vtyacl:

RP/0/0/CPU0:router# show ipv4 access-lists vtyacl
  
ipv4 access-list vtyacl
 10 permit ip host 10.32.162.48 any
 20 permit ip host 10.20.49.170 any
 30 permit ip host 10.60.3.5 any
  

The following sample output from the show ipv6 access-lists command displays the IPv6 access list name vtyacl:

RP/0/0/CPU0:router# show ipv6 access-lists vtyacl
  
ipv6 access-list vtyacl
 10 permit ipv6 host 2001:db8:2222:: any
 20 permit ipv6 host 2001:db8:0:4::2 any
   

Related Commands

Command

Description

ipv4 access-list

Defines an IPv4 access list by name.

ipv6 access-list

Defines an IPv6 access list by name.

autocommand

To automatically run one or more commands after a user logs in to a vty terminal session, use the autocommand command in line default or line template configuration mode. To remove the autocommand command from the configuration file and restore the system to its default condition, use the no form of this command.

autocommand command

no autocommand command

Syntax Description

command

Command or command alias to be executed on user login to a vty session.

Command Default

No default behavior or values

Command Modes

Line template configuration

Line default configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the autocommand command to automatically run a command or command alias when a user logs in to a vty session. To run multiple commands, use a command alias for the command argument. When the user logs in, the commands included in the alias are run sequentially.


Note


The autocommand command is supported on vty connections only; it is not supported on console or aux line connections. Use this command to automatically run a command after user login.


Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to use the autocommand command to automatically run the show ip interface brief command when a user logs in to a default vty session:

RP/0/0/CPU0:routerconfigure terminal
RP/0/0/CPU0:router(config)# line default 
RP/0/0/CPU0:router(config-line)# autocommand show ip interface brief
RP/0/0/CPU0:router(config-line)# end

Uncommitted changes found, commit them before exiting(yes/no/cancel)? [cancel]:yes

RP/0/0/CPU0:routerexit
  
  <Your 'TELNET' connection has terminated>
    

The following example shows how the show ip interface brief command is automatically run when the user logs on to a vty session:

User Access Verification
  
Username: lab
Password:

Executing Autocommand 'show ip interface brief'
RP/0/0/CPU0:routershow ip interface brief
  
Interface                      IP-Address      Status                Protocol
MgmtEth0/RP0/CPU0/0            172.16.0.0      Up                    Up
POS0/0/0/0                     unassigned      Up                    Up
POS0/0/0/1                     unassigned      Up                    Up
POS0/0/0/2                     unassigned      Up                    Up
POS0/0/0/3                     unassigned      Up                    Up
POS0/3/0/0                     unassigned      Up                    Up
POS0/3/0/1                     unassigned      Up                    Up
POS0/3/0/2                     unassigned      Up                    Up
POS0/3/0/3                     unassigned      Up                    Up 
  

The following example shows how to disable the feature using the no form of the autocommand command. In this example, the autocommand for the show ip interface brief command is disabled. When the user logs out, and logs back in, the autocommand command does not run.

RP/0/0/CPU0:routerconfigure terminal
RP/0/0/CPU0:router(config)# line default 
RP/0/0/CPU0:router(config-line)# no autocommand ?

  LINE  Appropriate EXEC command

RP/0/0/CPU0:router(config-line)# no autocommand show ip interface brief
RP/0/0/CPU0:router(config-line)# end

Uncommitted changes found, commit them before exiting(yes/no/cancel)? [cancel]:yes

RP/0/0/CPU0:routerexit
  
<Your 'TELNET' connection has terminated>
  
User Access Verification
  
Username: lab
Password: 
RP/0/0/CPU0:router#
    

The following example shows how to use a command alias with the autocommand command to run more than one command when a user logs in to a default vty session. In this example, the alias “test” is created to include the show ip interface brief command and the show users command. The autocommand feature is then used to run the “test” alias when a user logs in to the vty terminal:

RP/0/0/CPU0:routerconfigure terminal
RP/0/0/CPU0:router(config)# alias test show ip interface brief; show users
RP/0/0/CPU0:router(config)# line default 
RP/0/0/CPU0:router(config-line)# autocommand test
RP/0/0/CPU0:router(config-line)# end
  
Uncommitted changes found, commit them before exiting(yes/no/cancel)? [cancel]:yes

RP/0/0/CPU0:routerexit
  
<Your 'TELNET' connection has terminated>
  
User Access Verification
  
Username: lab
Password:
  
Executing Autocommand 'test'
RP/0/0/CPU0:routertest
  
RP/0/0/CPU0:routershow ip interface brief
  
Interface                      IP-Address      Status                Protocol
MgmtEth0/RP0/CPU0/0            172.16.0.0      Up                    Up
POS0/0/0/0                     unassigned      Up                    Up
POS0/0/0/1                     unassigned      Up                    Up
POS0/0/0/2                     unassigned      Up                    Up
POS0/0/0/3                     unassigned      Up                    Up
POS0/3/0/0                     unassigned      Up                    Up
POS0/3/0/1                     unassigned      Up                    Up
POS0/3/0/2                     unassigned      Up                    Up
POS0/3/0/3                     unassigned      Up                    Up
  
RP/0/0/CPU0:routershow users

   Line            User                 Service  Conns   Idle        Location
*  vty0            lab                  telnet       0  00:00:00     172.16.0.0
  

banner exec

To create a message that is displayed when an EXEC process is created (an EXEC banner), use the banner exec command in global configuration mode. To delete the EXEC banner, use the no form of this command.

banner exec delimiter message delimiter

no banner exec

Syntax Description

delimiter

Delimiting character is (c).

message

Message text. Text may include tokens in the form $( token ) in the message text. Tokens are replaced with the corresponding configuration variable. Tokens are described in Table 1.

Command Default

No EXEC banner is displayed.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the banner exec command to specify a message that is displayed when an EXEC process is created (a line is activated or an incoming connection is made to a vty). Follow this command with one or more blank spaces and the delimiting character (c). After entering one or more lines of text, terminate the message with the delimiting character (c).

When a user connects to a router, the message-of-the-day (MOTD) banner appears first, followed by the login banner and prompts. After the user logs in to the router, the EXEC banner or incoming banner is displayed, depending on the type of connection. For a reverse Telnet login, the incoming banner is displayed. For all other connections, the router displays the EXEC banner.

Use tokens in the form $( token ) in the message text to customize the banner. Tokens display current configuration variables, such as the router hostname and IP address.

The tokens are described in this table.



Table 1  banner exec Tokens

Token

Information Displayed in the Banner

$(hostname)

Displays the hostname for the router.

$(domain)

Displays the domain name for the router.

$(line)

Displays the vty or tty (asynchronous) line number.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set an EXEC banner that uses tokens:

RP/0/0/CPU0:router(config)# banner exec c

  Enter TEXT message.  End with the character 'c'.

THIS IS AN EXEC BANNER
c
         

Related Commands

Command

Description

banner incoming

Defines and enables a customized message that is displayed when there is an incoming connection to a terminal line from a host on the network.

banner login

Defines and enables a customized banner that is displayed before the username and password login prompts.

banner motd

Defines a customized MOTD banner.

banner prompt-timeout

Defines a customized banner that is displayed when there is a login timeout.

banner incoming

To create a banner that is displayed when there is an incoming connection to a terminal line from a host on the network, use the banner incoming command in global configuration mode. To delete the incoming connection banner, use the no form of this command.

banner incoming delimiter message delimiter

no banner incoming

Syntax Description

delimiter

Delimiting character is (c).

message

Message text. You can include tokens in the form $( token ) in the message text. Tokens are replaced with the corresponding configuration variable. Tokens are described in Table 1.

Command Default

No incoming banner is displayed.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Follow the banner incoming command with one or more blank spaces and the delimiting character (c). After entering one or more lines of text, terminate the message with the second occurrence of the delimiting character (c).

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 message-of-the-day (MOTD) banners and incoming banners, but they do not display EXEC banners.

When a user connects to a router, the MOTD banner (if configured) appears first, followed by the login banner and prompts. After the user logs in to the router, the EXEC banner or incoming banner is displayed, depending on the type of connection. For a reverse Telnet login, the incoming banner is displayed. For all other connections, the router displays 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.

To customize the banner, use tokens in the form $(token) in the message text. Tokens display current variables, such as the router hostname and IP address.

This table describes the tokens.

Table 2  banner incoming Tokens

Token

Information Displayed in the Banner

$(hostname)

Displays the hostname for the router.

$(domain)

Displays the domain name for the router.

$(line)

Displays the vty or tty (asynchronous) line number.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to create an incoming connection banner:

RP/0/0/CPU0:router(config)# banner incoming c

  Enter TEXT message. End with the character ‘c’
THIS IS AN INCOMING BANNER. 
c 
                     

Related Commands

Command

Description

banner exec

Defines a customized banner that is displayed whenever the EXEC process is initiated.

banner login

Defines and enables a customized banner that is displayed before the username and password login prompts.

banner motd

Defines a customized MOTD banner.

banner prompt-timeout

Defines a customized banner that is displayed when there is a login timeout.

banner login

To create a customized banner that is displayed before the username and password login prompts, use the banner login command in global configuration mode. To disable the login banner, use no form of this command.

banner login delimiter message delimiter

no banner login

Syntax Description

delimiter

Delimiting character is (c).

message

Message text. You can include tokens in the form $( token ) in the message text. Tokens are replaced with the corresponding configuration variable. Tokens are described in Table 1.

Command Default

No login banner is displayed.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Follow the banner login command with one or more blank spaces and the delimiting character (c). Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character (c).

When a user connects to the router, the message-of-the-day (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 is displayed, depending on the type of connection. For a reverse Telnet login, the incoming banner is displayed. For all other connections, the router displays the EXEC banner.

To customize the banner, use tokens in the form $( token ) in the message text. Tokens display current configuration variables, such as the router hostname and IP address.

Tokens are described in the this table.

Table 3  banner login Tokens

Token

Information Displayed in the Banner

$(hostname)

Displays the hostname for the router.

$(domain)

Displays the domain name for the router.

$(line)

Displays the vty or tty (asynchronous) line number.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set a login banner:

RP/0/0/CPU0:router(config)# banner login c

Enter TEXT message. End with the character 'c'.
THIS IS A LOGIN BANNER 
c 
                    

Related Commands

Command

Description

banner exec

Defines a customized banner that is displayed whenever the EXEC process is initiated.

banner incoming

Defines and enables a customized message that is displayed when there is an incoming connection to a terminal line from a host on the network.

banner motd

Defines a customized MOTD banner.

banner prompt-timeout

Defines a customized banner that is displayed when there is a login timeout.

banner motd

To create a message-of-the-day (MOTD) banner, use the banner motd command in global configuration mode. To delete the MOTD banner, use the no form of this command.

banner motd delimiter message delimiter

no banner motd

Syntax Description

delimiter

Delimiting character is (c).

message

Message text. You can include tokens in the form $( token ) in the message text. Tokens are replaced with the corresponding configuration variable.

Command Default

No MOTD banner is displayed.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Follow this command with one or more blank spaces and the delimiting character (c). Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character (c).

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 banner motd command to disable the MOTD banner on a line.

When a user 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 is displayed, depending on the type of connection. For a reverse Telnet login, the incoming banner is displayed. For all other connections, the router displays the EXEC banner.

To customize the banner, use tokens in the form $(token) in the message text. Tokens display current configuration variables, such as the router hostname and IP address.

Tokens are described in this table.

Table 4  banner motd Tokens

Token

Information Displayed in the Banner

$(hostname)

Displays the hostname for the router.

$(domain)

Displays the domain name for the router.

$(line)

Displays the vty or tty (asynchronous) line number.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to configure an MOTD banner with a token:

RP/0/0/CPU0:router(config)# banner motd c

  Enter TEXT message.  End with the character 'c'.
Notice: all routers in $(domain) will be upgraded beginning April 20 
c 
        

Related Commands

Command

Description

banner exec

Defines and enables a customized banner that is displayed whenever the EXEC process is initiated.

banner incoming

Defines and enables a customized message that is displayed when there is an incoming connection to a terminal line from a host on the network.

banner login

Defines and enables a customized banner that is displayed before the username and password login prompts.

banner prompt-timeout

Defines a customized banner that is displayed when there is a login timeout.

banner prompt-timeout

To create a banner that is displayed when there is a login authentication timeout, use the banner prompt-timeout command in global configuration mode. To delete the prompt timeout banner, use the no form of this command.

banner prompt-timeout delimiter message delimiter

no banner prompt-timeout

Syntax Description

delimiter

Delimiting character is (c).

message

Message text. You can include tokens in the form $(token) in the message text. Tokens are replaced with the corresponding configuration variable.

Command Default

No banner is displayed when there is a login authentication timeout.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Follow this command with one or more blank spaces and the delimiting character (c). Then enter one or more lines of text, terminating the message with the second occurrence of the delimiting character (c).

This prompt-timeout banner is displayed when there is a login authentication timeout at the username and password prompt.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to configure a prompt-timeout banner:

RP/0/0/CPU0:router(config)# banner prompt-timeout c

Enter TEXT message.  End with the character 'c'.
THIS IS A PROMPT TIMEOUT BANNER 
c 
            
         

Related Commands

Command

Description

banner exec

Defines and enables a customized banner that is displayed whenever the EXEC process is initiated.

banner incoming

Defines and enables a customized message that is displayed when there is an incoming connection to a terminal line from a host on the network.

banner login

Defines and enables a customized banner that is displayed before the username and password login prompts.

banner motd

Defines a customized MOTD banner.

clear line

To clear an auxiliary or console line to an idle state, use the clear line command in EXEC mode.

clear line { aux | console } location node-id

Syntax Description

aux

Clears the auxiliary line.

console

Clears the console line.

location node-id

Specifies the location of a route processor (RP) where the auxiliary or console line to be cleared resides. The node-id argument is entered in the rack/slot/module notation.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

tty-access

execute

Examples

The following example shows how to clear the console line, putting it in an idle state:

RP/0/0/CPU0:router# clear line console location 0/RP1/CPU0
            
         

Related Commands

Command

Description

show users

Displays information about the active lines on the networking device.

clear line vty

To clear a virtual terminal line (vty) to an idle state, use the clear line vty command in EXEC mode.

clear line vty line-number

Syntax Description

line-number

Line number in the range from 0 to 99.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the show users command to determine the origin of the connection and which lines to clear. When a line is cleared to an idle state, the user on the other end of the connection receives notice that the connection was closed by a foreign host.

Task ID

Task ID

Operations

tty-access

execute

Examples

The following example shows how to reset vty 3 to the idle state:

RP/0/0/CPU0:router# clear line vty 3
            
         

Related Commands

Command

Description

show users

Displays information about the active lines on the networking device.

cli interactive syntax check

To enable interactive syntax checking, use the cli interactive syntax check command in the appropriate line configuration mode. To disable interactive syntax checking, use the no form of this command.

cli interactive syntax check

no cli interactive syntax check

Syntax Description

This command has no keywords or arguments.

Command Default

Interactive syntax checking is disabled.

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the cli interactive syntax check command to check command syntax as you type. You are not allowed to enter incorrect syntax.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to enable interactive syntax checking:

RP/0/0/CPU0:router(config)# line console
RP/0/0/CPU0:router(config-line)# cli interactive syntax check 
                     

Related Commands

Command

Description

cli whitespace completion

Enables completion of a command when you type the space key.

cli whitespace completion

To enable completion of a command when you type the space key, use the cli whitespace completion command in the appropriate line configuration mode. To disable whitespace completion, use the no form of this command.

cli whitespace completion

no cli whitespace completion

Syntax Description

This command has no keywords or arguments.

Command Default

Whitespace completion is disabled.

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the cli whitespace completion command to complete the next word of the command syntax if you type the space key before completing the word. If more than one option is valid, all options are displayed for you to choose one.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to enable whitespace completion:

RP/0/0/CPU0:router(config)# line console
RP/0/0/CPU0:router(config-line)# cli whitespace completion
                    

Related Commands

Command

Description

cli interactive syntax check

Enables interactive syntax checking.

databits

To set the data bits per character for physical terminal connections, use the databits command in line console configuration mode. To restore the default value, use the no form of this command.

databits { 5 | 6 | 7 | 8 }

no databits

Syntax Description

5

Sets the data bits per character to 5.

6

Sets the data bits per character to 6.

7

Sets the data bits per character to 7.

8

Sets the data bits per character to 8.

Command Default

Eight databits per character.

Command Modes

Line console configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the databits command to set the data bits attributes for physical terminal connections. Physical terminal connections use either the console or auxiliary line template.

The databits command masks 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 keywords 5 and 6 are supplied for compatibility with older devices and generally are not used.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the data bits per character for the console terminal template to 7:

RP/0/0/CPU0:router(config)# line console
RP/0/0/CPU0:router(config-line)# databits 7
                     

Related Commands

Command

Description

show users

Displays information about the active lines on the networking device.

stopbits

Sets the number of stop bits.

disconnect

To disconnect a network connection, use the disconnect command in EXEC mode.

disconnect [ connection-number | network-name ]

Syntax Description

connection-number

(Optional) Number of the line of the active network connection to be disconnected. Range is from 1 to 20.

network-name

(Optional) Name of the active network connection to be disconnected.

Command Modes

EXEC

Command Default

Disconnects the existing network connection if no arguments are provided.

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Do not disconnect a line to end a session. Instead, log off the host before ending the session to clear the connection. If you cannot log out of an active session, disconnect the line.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to disconnect from a device (in this example “User1”) to return to the router:

User1% disconnect
 Connection closed by remote host
  
RP/0/0/CPU0:router# 

  

disconnect-character

To define a character to disconnect a session, use the disconnect-character command in line template configuration mode. To remove the disconnect-character command from the configuration file and restore the system to its default condition, use the no form of this command.

disconnect-character [ number | character ]

no disconnect-character

Syntax Description

number

(Optional) ASCII decimal equivalent of the disconnect character. Range is from 0 through 255.

character

(Optional) Disconnect character.

Command Default

No disconnect character is defined.

Command Modes

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The break character is represented by 0; null cannot be represented.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the disconnect character for the default line template to the Esc  character, which is the ASCII decimal equivalent 27:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# disconnect-character 27
                     

Related Commands

Command

Description

escape-character

Defines an escape character.

escape-character

To define a character to escape a session, use the escape-character command in line template configuration mode. To remove the escape-character command from the configuration file and restore the system to its default condition, use the no form of this command.

escape-character { break | number | character | default | none }

no escape-character

Syntax Description

break

Sets the escape character to the Break key.

number

ASCII decimal equivalent of the escape character. Range is from 0 through 255.

character

Escape character.

default

Specifies the default escape character (^^X).

none

Disables the escape function.

Command Default

The default escape character is ^^X.

Command Modes

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the escape-character command to define an escape character sequence that is different from the default. Use the escape character to exit from an existing connection and return to the EXEC prompt.

The default escape key sequence is Ctrl-Shift-6, X (^^X).The escape-character command with the default keyword sets the escape character to the Break key (the default setting for the Break key is Ctrl-C).

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the escape character for the default line template to Ctrl-P, which is the ASCII decimal character 16:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# escape-character 16
                     

Related Commands

Command

Description

disconnect-character

Defines a disconnect character.

exec-timeout

To set the interval that the EXEC command interpreter waits until user input is detected, use the exec-timeout command in the appropriate line configuration mode. To remove the exec-timeout command from the running configuration and restore the system to its default condition, use the no form of this command.

exec-timeout minutes seconds

no exec-timeout minutes seconds

Syntax Description

minutes

Minutes for the wait interval. Range is from 0 to 35791.

seconds

Seconds for the wait interval. Range is from 0 to 2147483.

Command Default

minutes: 10

seconds: 0

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

If no input is detected during the interval, the EXEC facility resumes the current connection. If no connections exist, the EXEC facility returns the terminal to the idle state and disconnects the incoming session. To disable the EXEC timeout function so that the EXEC session never timeouts, enter the following command:

exec-timeout 00

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the timeout interval for the console line template to 60 minutes, 0 seconds:

RP/0/0/CPU0:router(config)# line console 
RP/0/0/CPU0:router(config-line)# exec-timeout 60 0
                     

Related Commands

Command

Description

absolute-timeout

Sets the absolute timeout for line disconnection.

session-timeout

Sets the idle wait timeout interval for user input over a virtual terminal connection.

flowcontrol hardware

To configure the hardware flow control setting for physical terminal connections, use the flowcontrol hardware command in line console configuration mode. To remove the attribute from the configuration file and restore the system to its default condition, use the no form of this command.

flowcontrol hardware { in | out | none }

no flowcontrol hardware { in | out | none }

Syntax Description

in

Specifies inbound flow control.

out

Specifies outbound flow control.

none

Specifies no flow control.

Command Default

None

Command Modes

Line console configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the flowcontrol hardware command to set the flow control attribute for physical line connections. Physical line connections use either the console or auxiliary line template.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to restrict the hardware flow control to inbound for the console line template:

RP/0/0/CPU0:router(config)# line console 
RP/0/0/CPU0:router(config-line)# flowcontrol hardware in
                     

Related Commands

Command

Description

show users

Displays information about the active lines on the networking device.

length

To set the number of lines that display at one time on the screen, use the length command in line template configuration mode. To remove the length command from the configuration file and restore the system to its default condition, use the no form of this command.

length lines

no length lines

Syntax Description

lines

Number of lines that displays on a screen. Range is from 0 through 512. 0 specifies no pausing. The default is 24.

Command Default

lines : 24

Command Modes

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the length command to modify the default length setting for the specified line template. The length setting determines when the screen pauses during the display of multiple-screen output. Specifying a value of 0 for the lines argument prevents the router from pausing between screens of output.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the length of the default line template to 33 lines:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# length 33
                     

Related Commands

Command

Description

terminal length

Sets the length of the display terminal for the current terminal session.

line

To specify the console, the default, or a user-defined line template and enter line template configuration mode, use the line command in global configuration mode.

line { console | default | template template-name }

Syntax Description

console

Specifies the line template for the console line.

default

Specifies the default line template.

template template-name

Specifies a user-defined line template to be applied to a vty pool.

Command Default

None

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

The aux keyword was not supported.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the line command to specify a line template type and enter into line template configuration mode. Line templates are a collection of attributes used to configure and manage physical terminal line connections (the console and auxiliary ports) and vty connections. The following templates are available in Cisco IOS XR software:

  • Default line template—The default line template that applies to a physical and virtual terminal lines.
  • Console line template—The line template that applies to the console line.
  • User-defined line templates—User-defined line templates that can be applied to a range of virtual terminal lines.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to enter line template configuration mode to allow configuration changes to be made to the default line template:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# 
  

Related Commands

Command

Description

vty-pool

Creates or modifies a vty pool.

parity

To set the parity bit for physical terminal connections, use the parity command in line console configuration mode. To specify no parity, use the no form of this command.

parity { even | none | odd }

no parity { even | none | odd }

Syntax Description

even

Specifies even parity.

none

Specifies no parity.

odd

Specifies odd parity.

Command Default

No parity is set.

Command Modes

Line console configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.4.0

The mark and space keywords were removed.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Communication protocols provided by devices such as terminals and modems often require a specific parity bit setting.

Use the paritycommand for setting the parity attribute for physical terminal connections. Physical terminal connections use either the console or auxiliary line template.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the line parity configuration to even for the console line template:

RP/0/0/CPU0:router(config)# line console
RP/0/0/CPU0:router(config-line)# parity even
                    

Related Commands

Command

Description

show users

Displays information about the active lines on the networking device.

resume

To switch to another active Secure Shell (SSH) or Telnet session, use the resume command in EXEC mode.

resume [connection]

Syntax Description

connection

(Optional) Name or number of the active network connection; the default is the most recent connection. Number range is from 1 to 20.

Command Default

The most recent connection.

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

SSH and Telnet sessions can be established to another router or server.

When the network session is being established and without disconnecting the network session, you can resume the router console session by typing a special sequence of characters as shown. After switching back to the router console, the network connection can be resumed by specifying the number of the connection or the name of the connection.

You can have several concurrent sessions open and switch back and forth between them. The number of sessions that can be open is defined using the session-limit command.

You can switch between sessions by escaping one session and resuming a previously opened session, as follows:

  1. Escape from the current session by pressing the escape sequence (Ctrl Shift-6, x [^^X]) to return to the EXEC prompt.
  2. Enter the show sessions command to list the open sessions. All open sessions associated with the current terminal line are displayed.
  3. Enter the resume command and the session number to make the connection. You can also resume the previous session by pressing the Return key. The ^^X and commands are available for all supported connection protocols.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to escape from one connection and resume another. You can omit the connection name and simply enter the connection number to resume that connection.

host1% ^^X 
RP/0/0/CPU0:router# resume 1

blg_router#
    

Related Commands

Command

Description

session-limit

Sets the maximum number of outgoing terminal sessions from the current terminal.

show sessions

Displays information about SSH and Telnet connections.

telnet

Logs in to a host that supports Telnet.

send

To send messages to one or all terminal lines, use the send command in EXEC mode.

send { * | line-number | aux 0 | console 0 | vty number }

Syntax Description

*

Sends a message to all tty lines.

line-number

Line number to which the message is sent. A number from 0 to 101.

aux 0

Sends a message to the auxiliary line.

console 0

Sends a message to the console line.

vty number

Sends a message to a virtual terminal line (vty). Range is 0 to 99.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The system prompts for the message, which can be up to 500 characters long. Enter Ctrl-Z to end the message. Enter Ctrl-C to abort this command.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to send a message to all lines:

RP/0/0/CPU0:router# send *
  
Enter message, end with CTRL/Z; abort with CTRL/C:
The system will be shut down in 10 minutes for repairs.^Z
Send message? [confirm]
RP/0/0/CPU0:router# 
  
***
***
*** Message from tty to all terminals:
***
The system will be shut down in 10 minutes for repairs.

  

session-limit

To set the maximum number of outgoing terminal sessions from the current terminal, use the session-limit command in the appropriate line configuration mode. To remove any specified session limit, use the no form of this command.

session-limit connections

no session-limit

Syntax Description

connections

Maximum number of outgoing connections. Range is from 0 through 20.

Command Default

connections : 6

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to limit the number of active outgoing connections for the default line template to eight:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# session-limit 8
            
         

session-timeout

To set the timeout interval for all outgoing connections from the current terminal, use the session-timeout command in the appropriate line configuration mode. To remove the session-timeout command from the configuration file and restore the system to its default condition, use the no form of this command.

session-timeout minutes [output]

no session-timeout minutes

Syntax Description

minutes

Timeout interval, in minutes. Range is 0 to 35791. The default is 10.

output

(Optional) Specifies that when traffic is sent to an asynchronous line from the router (within the specified interval), the connection is retained.

Command Default

minutes : 10

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the session-timeout command to set the interval that Cisco IOS XR software waits for traffic before closing the connection to a remote device and returning the terminal to an idle state. If the output keyword is not specified, the session timeout interval is based solely on detected input from the user. If the keyword is specified, the interval is based on input and output traffic.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the session timeout value for the default line template to 120 minutes (2 hours):

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# session-timeout 120            
         

show line

To display the parameters of terminal lines, use the show line command in EXEC mode.

show line [ aux location node-id | console location node-id | vty number ]

Syntax Description

aux

(Optional) Displays the terminal line parameters for the auxiliary line.

location node-id

(Optional) Specifies the location for the route processor (RP) on which the auxiliary or console port resides. The node-id argument is entered in the rack/slot/module notation.

console

(Optional) Displays the terminal line parameters for the console line.

vty number

(Optional) Specifies a virtual terminal line (vty) number. Range is from 0 through 99.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

tty-access

read

Examples

The following example shows sample output from the show line command. The asterisk (*) indicates the current terminal session.

RP/0/0/CPU0:router# show line
  
     Tty             Speed     Modem  Uses   Noise Overruns           Acc I/O
     aux0_0_0         9600       -     -       -      0/0               -/-
  *  con0_0_0         9600       -     -       -      0/0               -/-
     vty0             0/0        -     -       -      0/0               -/-
     vty1             0/0        -     -       -      0/0               -/-
     vty2             0/0        -     -       -      0/0               -/-
     vty3             0/0        -     -       -      0/0               -/-
     vty4             0/0        -     -       -      0/0               -/-
     vty100           0/0        -     -       -      0/0               -/-
     vty101           0/0        -     -       -      0/0               -/-
     vty102           0/0        -     -       -      0/0               -/-
     vty103           0/0        -     -       -      0/0               -/-
     vty104           0/0        -     -       -      0/0               -/-
     vty105           0/0        -     -       -      0/0               -/-  
  
Table 5  show line Field Descriptions

Field

Description

Tty

Available ttys and vtys.

Speed

Baud rate that the inbound serial connection is using, in bps.

Modem

Not implemented.

Uses

Not implemented.

Noise

Not implemented.

Overruns

Hardware Universal Asynchronous Receiver/Transmitter (UART) overruns or software buffer overflows, both defined as the number of overruns or overflows that have occurred on the specified line since the system was restarted. Hardware overruns are buffer overruns; the UART chip has received bits from the software faster than it can process them. A software overflow occurs when the software has received bits from the hardware faster than it can process them.

Acc I/O

Not implemented.

The following example shows sample output from the show line command with the console line specified:

RP/0/0/CPU0:routershow line console location 0/rp0/cpu0
  
     Tty             Speed     Overruns             Acc I/O
     con0/RP0/CPU0    9600          0/0                 -/-         
  
  Line con0_RP0_CPU0, Location "0/RP0/CPU0", Type "Console"
  Length: 24 lines, Width: 80 columns
  Baud rate (TX/RX) is 9600, 1 parity, 2 stopbits, 8 databits
  Template: console
  Capabilities: Timestamp Disabled
  Allowed transports are none.  
  
Table 6  show line location Field Descriptions

Field

Description

Tty

Unique identifier of the tty; it contains the type of tty and, for physical ttys, it indicates the physical location of the tty.

Speed

Baud rate that the inbound serial connection is using in bps.

Overruns

Hardware UART overruns or software buffer overflows, both defined as the number of overruns or overflows that have occurred on the specified line since the system was restarted. Hardware overruns are buffer overruns; the UART chip has received bits from the software faster than it can process them. A software overflow occurs when the software has received bits from the hardware faster than it can process them.

Acc I/O

Not implemented.

Line

Unique identifier of the TTY. This field displays the type of TTY and the physical location of physical TTYs.

Location

Location of the line.

Type

Line type.

Length

Length of the terminal or screen display, in rows.

Width

Width of the terminal or screen display, in columns.

Baud rate (TX/RX)

Transmit rate/receive rate of the line, in bps.

parity

Parity bits value used for physical terminal connections.

stopbits

Stop bits value used for physical terminal connections.

databits

Data bits value used for physical terminal connections.

Template

Line template being sourced by the particular connection.

Config

Configuration applied to the tty. This field indicates the allowed incoming transports that can be used to access the router from this tty.

Allowed transports are

Incoming transport protocols that can be used by this tty to access the router.

show sessions

To display information about suspended Secure Shell (SSH) and Telnet connections launched from the terminal session, use the show sessions command in EXEC mode.

show sessions

Syntax Description

This command has no keywords or arguments.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the show sessions command to display the hostname, remote connection service used by the router to access the host, idle time, and connection name.

Task ID

Task ID

Operations

tty-access

read

Examples

The following example shows sample output from the show sessions command:

RP/0/0/CPU0:router# show sessions
  
  Conn Host                Address             Service Idle Conn Name
  *  1 10.26.25.40         10.26.25.40         telnet    15 10.26.25.40  
  

The asterisk (*) indicates the current terminal session.

Table 7  show sessions Field Descriptions

Field

Description

Conn

Identifier for the connection used for resuming and disconnecting suspended sessions. An asterisk (*) indicates the current terminal session.

Host

Remote host to which the router is connected. This field displays either the IP address or hostname of the remote host. If the IP address of the remote host is mapped to the hostname (that is, if Domain Name System [DNS] services are enabled) and the session is initiated with the hostname, the output for this field displays the hostname of the host rather than the IP address of the host.

Address

IP address of the remote host.

Service

Remote connection service used.

Idle

Interval (in seconds) since data was last sent on the line.

Conn Name

Equivalent to the “Host” field in Cisco IOS XR software.

Related Commands

Command

Description

disconnect

Disconnects a network connection.

resume

Switches to another active Telnet session.

show terminal

To obtain information about the terminal configuration attribute settings for the current terminal line, use the show terminal command in EXEC mode.

show terminal

Syntax Description

This command has no keywords or arguments.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

tty-access

read

Examples

This example shows sample output from the show terminal command:

RP/0/0/CPU0:router# show terminal
  
Line vty0, Location "10.56.249.67", Type "VTY"
Length: 24 lines, Width: 80 columns
Baud rate (TX/RX) is 0, 0 parity, 0 stopbits, 0 databits
Template: default
Capabilities: Timestamp Disabled
Allowed transports are telnet ssh.

  
Table 8  show terminal Field Descriptions

Field

Description

Line

Line that is currently being used.

Location

Location of the terminal accessing the router.

Type

Type of line.

Length

Length of the terminal or screen display, in rows.

Width

Width of the terminal or screen display, in columns.

Baud rate (TX/RX)

Transmit or receive rate of the line, in bps.

parity

Parity bits value used for physical terminal connections.

stopbits

Stop bits value used for physical terminal connections.

databits

Data bits value used for physical terminal connections.

Template

Line template being sourced by the particular connection.

Config

Configuration applied to the tty. This field indicates the allowed incoming transports that can be used to access the router from this tty.

Allowed transports are

Incoming transport protocols that can be used by this tty to access the router.

show users

To display information about the active lines on the router, use the show users command in EXEC mode.

show users

Syntax Description

This command has no keywords or arguments.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the show users command to display the line number, connection name, idle time, hosts, and terminal location. An asterisk (*) indicates the current terminal session.


Note


To display all user groups and task IDs associated with the currently logged-in user, use the show user command in EXEC mode. See the Authentication, Authorization, and Accounting Commands on Cisco IOS XR Software module in Cisco IOS XR System Security Command Reference for the Cisco XR 12000 Series Router.


Task ID

Task ID

Operations

tty-access

read

Examples

The following example shows sample output identifying an active vty terminal session:

RP/0/0/CPU0:router# show users
  
     Line            User                 Service  Conns   Idle        Location
     con0_RP0_CPU0   cisco                hardware     0  18:33:48     
     vty0            cisco                telnet       0  00:30:36     10.33.54.132
  *  vty1            cisco                telnet       0  00:00:00     10.33.54.132  
  
Table 9  show users Command Output Field Descriptions

Field

Description

Line

All current connections. An asterisk (*) indicates the active connection.

User

Username of the user logged into the line.

Service

Physical or remote login service used.

Conns

Number of outgoing connections.

Idle

Interval (in hours:minutes:seconds) since last keystroke.

Location

IP address of remote login host. For local (physical) terminal connections, this field is blank.

Related Commands

Command

Description

show line

Displays the parameters of a terminal line.

show user

Displays all user groups and task IDs associated with the currently logged-in user.

stopbits

To set the stop bits used for physical terminal connections, use the stopbits command in line console configuration mode. To restore the default, use the no form of this command.

stopbits { 1 | 2 }

no stopbits

Syntax Description

1

Specifies one stop bit.

2

Specifies two stop bits. This is the default.

Command Default

Two stop bits.

Command Modes

Line console configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the stopbits command to set the data bits attributes for physical terminal connections. Physical terminal connections use either the console or auxiliary terminal templates.

Communication protocols provided by devices such as terminals and modems often require a specific stop-bit setting.


Note


The number of stop bits configured on the router and a terminal server should be same. The default number of stop bits on the router is two stop-bits.


Task ID

Task ID

Operations

tty-access

read, write

Examples

This example shows how to change the default from two stop bits to one for the console line template:

RP/0/0/CPU0:router(config)# line console
RP/0/0/CPU0:router(config-line)# stopbits 1
                     

Related Commands

Command

Description

databits

Sets the number of data bits.

terminal exec prompt

To specify prompt attributes for the current terminal session, use the terminal exec prompt command in EXEC mode.

terminal exec prompt { no-timestamp | timestamp }

Syntax Description

no-timestamp

Disables the time-stamp printing before each command.

timestamp

Enables the time-stamp printing before each command.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use theterminal exec prompt command with the timestamp keyword to show the time-stamp display after each command is entered. Use the terminal exec command with the no-timestamp keyword to disable the time-stamp display.


Note


The terminal commands are active for the current terminal session only. To apply a setting to all sessions, use the line commands.


Task ID

Task ID

Operations

tty-access

read

Examples

This example shows how to enable the time-stamp prompt. When enabled, the date and time are displayed after each command. In this example, the show version command is entered, and the date and time is displayed.

RP/0/0/CPU0:routerterminal exec prompt timestamp   
RP/0/0/CPU0:routershow version

Thu Feb 19 13:17:34.962 PST DST

Cisco IOS XR Software, Version 3.8.0.30I[SIT_IMAGE]
Copyright (c) 2009 by Cisco Systems, Inc.

ROM: System Bootstrap, Version 12.0(20051020:160303) [sjabbar-CSCsa64979_4 1.17dev(0.5)] DEVELOPMENT SOFTWARE
Copyright (c) 1994-2005 by cisco Systems,  Inc.

router uptime is 1 week, 2 days, 12 hours, 31 minutes
System image file is "disk0:c12k-os-mbi-3.8.0.30I/mbiprp-rp.vm"

cisco 12406/PRP (7457) processor with 2097152K bytes of memory.
7457 processor at 1266Mhz, Revision 1.2

2 Cisco 12000 Series - Multi-Service Blade Controllers
2 Cisco 12000 Series SPA Interface Processor-601/501/401
1 Cisco 12000 Series Performance Route Processor
3 Management Ethernet
8 PLIM_QOS
6 T3
6 SONET/SDH
6 Packet over SONET/SDH
2 GigabitEthernet/IEEE 802.3 interface(s)
28 T1
 --More--
  

The following example shows how to disable the time-stamp prompt:

RP/0/0/CPU0:routerterminal exec prompt no-timestamp 
                    

Related Commands

Command

Description

line

Specifies the console, the default, or a user-defined line template and enters line template configuration mode.

show terminal

Display the terminal configuration settings for the current terminal line.

terminal exec utility pager

To configure the terminal page display options, use the terminal exec utility pager command in EXEC mode.

terminal exec utility pager { less | more | none }

Syntax Description

less

Specifies to use unix-like "less" bidirectional paging for the terminal display.

more

Specifies to use unix-like "more" unidirectional paging for the terminal display.

none

Specifies that the display is not paginated.

Command Default

No pagination is configured by default.

Command Modes

EXEC

Command History

Release Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the terminal exec utility pager command with the more keyword to scroll forward through command display one screen at a time. "--More--" is displayed at the end of each screen. Press the Space key to advance one screen. Press the Enter key to advance one line. Press the Esc key to exit the command display.

Task ID

Task ID Operation

tty-access

Read

Examples

This example shows how to limit command display to one screen at a time such that you can move forward through the display:

RP/0/0/CPU0:router#terminal exec utility pager more

terminal length

To set the number of lines that display at one time on the screen for the current terminal session, use the terminal length command in EXEC mode.

terminal length lines

Syntax Description

lines

Number of lines that display on a screen. Range is from 0 through 512.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the terminal length command to set the terminal length value for only the current terminal session and not save it to the running configuration. Exiting from the terminal session returns the terminal length value to the value configured with the length command.

Specifying a value of 0 for the lines argument prevents the router from pausing between screens of output.


Note


The terminal commands are active for the current terminal session only. To apply a setting to all sessions, use the line commands.


Task ID

Task ID

Operations

tty-access

read, write

Examples

This example shows how to set the length for the current terminal session to 120 lines:

RP/0/0/CPU0:router# terminal length 120
                    

Related Commands

Command

Description

length

Sets the length of the display terminal.

terminal width

To set the width of the display terminal for the current terminal session, use the terminal width command in EXEC mode.

terminal width characters

Syntax Description

characters

Number of characters to display on a screen. Range is from 0 to 512.

Command Default

None

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the terminal width command to set the terminal width value for only the current terminal session and not save it to the running configuration. Exiting from the terminal session returns the terminal width value to the value configured with the width (display) command.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the terminal width for the current terminal session to 120 characters:

RP/0/0/CPU0:router# terminal width 120
                     

Related Commands

Command

Description

width (display)

Sets the width of the display terminal.

timestamp disable

To disable time-stamp recording at the top of each command output, use the timestamp disable command in the appropriate line configuration mode. To reenable time-stamp recording if disabled, use the no form of this command.

timestamp disable

no timestamp disable

Syntax Description

This command has no keywords or arguments.

Command Default

Time-stamp recording at the top of each command output is enabled.

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.4.0

No modification.

Release 3.8.0

The command was changed from timestamp to timestamp disable. The default was changed.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

By default, the time stamp is displayed at the top of any command output. The time stamp records the time at which the command was issued. You can use the snmp-server view command to disable this setting so that the time stamp does not appear at the top of the command output. This setting applies to all command outputs on any terminal line to which the current line template applies.

Task ID

Task ID

Operations

tty-access

read, write

Examples

This example shows how to disable time-stamp recording for the console line template:

RP/0/0/CPU0:router(config)# line console             
RP/0/0/CPU0:router(config-line)#  timestamp disable
                     

transport input

To define the transport protocols that can be used to access the router, use the transport input command in the appropriate line configuration mode. To change or remove the protocol, use the no form of this command.

transport input { all | none | ssh | telnet }

no transport input { all | none | ssh | telnet }

Syntax Description

all

Specifies the Secure Shell (SSH) and Telnet protocols.

none

Specifies that the router rejects incoming SSH and Telnet transport protocol connections.

ssh

Specifies the SSH transport protocol.

telnet

Specifies the Telnet transport protocol.

Command Default

All protocols are allowed on the line.

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

To be accepted, incoming network connections to an asynchronous port (terminal line) must use a transport protocol specified with the transport input command. This command can be useful in limiting the acceptable transport protocols to include or exclude those used by different types of users, or to restrict a line to secure connections (SSH connections).

Task ID

Task ID

Operations

tty-access

read, write

Examples

This example shows how to set the transport input setting for the default line template to SSH connections:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# transport input ssh
                     

Related Commands

Command

Description

transport output

Determines the protocols that can be used for outgoing connections from a line.

transport preferred

Specifies the transport protocol that Cisco IOS XR software uses if the user does not specify one when initiating a connection.

transport output

To specify the transport protocols that can be used for outgoing connections from a line, use the transport output command in the appropriate line configuration mode. To change or remove the protocol, use the no form of this command.

transport output { all | none | ssh | telnet }

no transport output { all | none | ssh | telnet }

Syntax Description

all

Specifies the Secure Shell (SSH) and Telnet transport protocols.

none

Specifies that the router rejects outgoing SSH and Telnet transport protocol connections.

ssh

Specifies the SSH transport protocol.

telnet

Specifies the Telnet transport protocol.

Command Default

All protocols are allowed on the line.

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Any settings made with the transport output command override settings made with the transport preferred command.

Task ID

Task ID

Operations

tty-access

read, write

Examples

This example shows how to set the default line template to prevent any outgoing transport protocol connections:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# transport output none
                     

Related Commands

Command

Description

transport input

Defines which protocols to use to connect to a specific line of the router.

transport preferred

Specifies the transport protocol that Cisco IOS XR software uses if the user does not specify one when initiating a connection.

transport preferred

To specify the default outgoing transport protocol to be used for initiating network connections, use the transport preferred command in the appropriate line configuration mode. To change or remove the protocol, use the no form of this command.

transport preferred { none | ssh | telnet }

no transport preferred { none | ssh | telnet }

Syntax Description

none

Disables the feature.

ssh

Specifies the Secure Shell (SSH) transport protocol.

telnet

Specifies the Telnet transport protocol.

Command Default

No transport protocol is set as the default outgoing protocol.

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the transport preferred command to provide a default transport protocol to use when initiating outgoing connections. The preferred outgoing transport protocol specified with the transport preferred command enables you to initiate an outgoing connection without explicitly specifying the transport protocol.

Cisco IOS XR software assumes that any unrecognized command is a hostname and the software attempts a connection. When the protocol is set to none, the system ignores unrecognized commands entered at the EXEC prompt, and does not attempt a connection.

The default setting, the same as using the transport preferred command with the none keyword, prevents errant connection attempts.

Task ID

Task ID

Operations

tty-access

read, write

Examples

The following example shows how to set the preferred transport setting for the default line template to SSH:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# transport preferred ssh
                     

Related Commands

Command

Description

transport input

Defines which protocols to use to connect to a specific line of the router.

transport output

Determines the protocols that can be used for outgoing connections from a line.

vty-pool

To create or modify a virtual terminal line (vty) pool, use the vty-pool command in global configuration mode. To delete a vty pool, use the no form of this command.

vty-pool { default | eem | pool-name } first-vty last-vty [ line-template { default | template-name } ]

no vty-pool { default | eem | pool-name } first-vty last-vty [ line-template { default | template-name } ]

Syntax Description

default

Specifies the default vty pool.

eem

Specifies the embedded event manager vty pool.

pool-name

User-defined vty pool.

first-vty

First vty line in the pool.

  • For the default vty pool, you must specify 0 for the first vty line.
  • For a user-defined vty pool, the range is 5 to 99.
  • For the embedded event manager vty pool, you must specify 100 for the first vty line.

last-vty

Last vty line in the pool.

  • The default vty pool must contain at least five vtys. Range is 4 to 99.
  • For a user-defined vty pool, the range is 5 to 99.
  • The embedded event manager vty pool must contain at least six vtys. Range is 105 to 199.

line-template

(Optional) Specifies the terminal template to be used in the configuration of virtual terminals in the vty pool.

default

Specifies that the vty pool should reference the default template.

template-name

User-defined template to be applied to the vtys in the vty pool.

Command Default

default vty-pool : 5 vtys (vty 0 through 4) referencing the default line template.

eem vty pool : 6 vtys (vty 100 through 105) referencing the default line template.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.8.0

The keyword fm was changed to eem .

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

When creating or modifying vty pools, follow these usage guidelines:

  • Before creating or modifying the vty pools, enable the Telnet server using the telnet server command in global configuration mode. See Cisco IOS XR IP Addresses and Services Configuration Guide for the Cisco XR 12000 Series Router and Cisco IOS XR IP Addresses and Services Command Reference for the Cisco XR 12000 Series Router for more information.
  • The vty range for the default vty pool must start at vty 0 and must contain a minimum of five vtys.
  • The vty range from 0 through 99 can reference the default vty pool.
  • The vty range from 5 through 99 can reference a user-defined vty pool.
  • The vty range from 100 is reserved for the embedded event manager vty pool.
  • The vty range for embedded event manager vty pools must start at vty 100 and must contain a minimum of six vtys.
  • A vty can be a member of only one vty pool. A vty pool configuration fails if the vty pool includes a vty that is already in another pool.

If you attempt to remove an active vty from the active vty pool when configuring a vty pool, the configuration for that vty pool fails.

Task ID

Task ID

Operations

tty-access

read, write

Examples

This example shows how to configure a user-defined vty pool (test1) that contains vtys 10 through14 and references the user-defined line template test2:

RP/0/0/CPU0:router(config)# vty-pool test1 10 14 line-template test2
   

Related Commands

Command

Description

line

Enters line template configuration mode for the specified line template.

width (display)

To set the width of the display terminal, use the width command in the appropriate line configuration mode. To remove the width command from the configuration file and restore the system to its default condition, use the no form of this command.

width characters

no width characters

Syntax Description

characters

Number of characters to display on a screen. Range is from 0 to 512.

Command Default

characters : 80

Command Modes

Line console configuration

Line default configuration

Line template configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the width command to modify the default width setting for the specified line template.

Task ID

Task ID

Operations

tty-access

read, write

Examples

This example shows how to set the terminal width for the default line template to 99 characters:

RP/0/0/CPU0:router(config)# line default
RP/0/0/CPU0:router(config-line)# width 99
                    

Related Commands

Command

Description

terminal width

Sets the width of the display terminal for the current terminal session.