Contents

• Implementing Physical and Virtual Terminals on the Cisco IOS XR Software
• Prerequisites for Implementing Physical and Virtual Terminals
• Information About Implementing Physical and Virtual Terminals
• Line Templates
• Line Template Configuration Mode
• Line Template Guidelines
• Terminal Identification
• vty Pools
• How to Implement Physical and Virtual Terminals on Cisco IOS XR Software
• Modifying Templates
• Creating and Modifying vty Pools
• Monitoring Terminals and Terminal Sessions
• Configuration Examples for Implementing Physical and Virtual Terminals
• Additional References

Implementing Physical and Virtual Terminals on the Cisco IOS XR Software

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Line templates define standard attribute settings for incoming and outgoing transport over physical and virtual terminal lines (vtys). Vty pools are used to apply template settings to ranges of vtys.

Note

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.

This module describes the new and revised tasks you need to implement physical and virtual terminals on your Cisco IOS XR network.

For more information about physical and virtual terminals on the Cisco IOS XR software and complete descriptions of the terminal services commands listed in this module, see Related Documents. To locate documentation for other commands that might appear in the course of running a configuration task, search online in Cisco IOS XR Commands Master List for the Cisco XR 12000 Series Router.

Table 1 Feature History for Implementing Physical and Virtual Templates on Cisco IOS XR Software

Release	Modification
Release 3.2	This feature was introduced.
Release 3.3.0	No modification.
Release 3.4.0	No modification.
Release 3.5.0	No modification.
Release 3.6.0	No modification.
Release 3.7.0	No modification.
Release 3.8.0	The keyword fm in the vty-pool command was changed to eem .
Release 3.9.0	No modification.

This module contains the following topics:

• Prerequisites for Implementing Physical and Virtual Terminals
• Information About Implementing Physical and Virtual Terminals
• How to Implement Physical and Virtual Terminals on Cisco IOS XR Software
• Configuration Examples for Implementing Physical and Virtual Terminals
• Additional References

Prerequisites for Implementing Physical and Virtual Terminals

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Information About Implementing Physical and Virtual Terminals

To implement physical and virtual terminals, you need to understand the concepts in this section.

• Line Templates
• Line Template Configuration Mode
• Line Template Guidelines
• Terminal Identification
• vty Pools

Line Templates

The following line templates are available in the 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.

Line Template Configuration Mode

Changes to line template attributes are made in line template configuration mode. To enter line template configuration mode, issue the line command from global configuration mode, specifying the template to be modified. The line templates that are available to be configured with the line command can be displayed using the online help feature ( ? ):

RP/0/0/CPU0:router(config)# line ?
  
console   console template
default   default template
template  user defined template
  

After you specify a template with the line command, the router will enter line template configuration mode where you can set the terminal attributes that will apply to specified line template. This example shows how to specify the console template and to enter line template configuration mode for the console template:

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

From line template configuration mode, the following terminal attribute setting commands can be configured:

RP/0/0/CPU0:router(config-line)# ?
  
absolute-timeout      Set absolute timeout for line disconnection.
access-class          Filter connections based on an IP access list
accounting            Accounting parameters
authorization         Authorization parameters
commit                Commit the configuration changes to running
databits              Set the nimber of databits.
default               Set a command to its defaults
describe              Describe a command without taking real actions
disconnect-character  Define the disconnect character
do                    Run an exec command
escape-character      Change the current line template's escape character
exec-timeout          Set EXEC timeout
exit                  Exit from this submode
flowcontrol           Configure flow control.
length                Set number of lines on a screen.
login                 Line login configuration
no                    Negate a command or set its defaults
parity                Set the parity used.
password              Specify the password for the user
secret                Provide a secure one way encrypted password
session-limit         Set the number of outgoing connections
session-timeout       Set interval for closing connection when there is no input traffic
show                  Show contents of configuration
speed                 Set the serial port inbound/outbound speed.
stopbits              Set the stopbits used.
telnet                Telnet protocol-specific configuration
timeout               Timeouts for the line
transport             Define transport protocols for line
users                 Users characteristics
width                 Set width of the display terminal.
  

Line Template Guidelines

The following guidelines apply to modifying the console template and to configuring a user-defined template:

• Modify the templates for the physical terminal lines on the router (the console port) from line template configuration mode. Use the line console command from global configuration mode to enter line template configuration mode for the console template.

• Modify the template for virtual lines by configuring a user-defined template with the line template-name command, configuring the terminal attributes for the user-defined template from line template configuration, and applying the template to a range of virtual terminal lines using the vty pool command.

Attributes not defined in the console template, or any virtual template, are taken from the default template.

The default settings for the default template are described for all commands in line template configuration mode in the Terminal Services Commands on the Cisco IOS XR Software module in Cisco IOS XR System Management Command Reference for the Cisco XR 12000 Series Router.

Note

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.

Terminal Identification

The physical terminal lines for the console port is identified by its location, expressed in the format of rack/slot/module , on the active or standby route processor (RP) where the respective console port resides. For virtual terminals, physical location is not applicable; the Cisco IOS XR software assigns a vty identifier to vtys according to the order in which the vty connection has been established.

vty Pools

Each virtual line is a member of a pool of connections using a common line template configuration. Multiple vty pools may exist, each containing a defined number of vtys as configured in the vty pool. The Cisco IOS XR software supports the following vty pools by default:

• Default vty pool—The default vty pool consists of five vtys (vtys 0 through 4) that each reference the default line template.

• Default fault manager pool—The default fault manager pool consists of six vtys (vtys 100 through 105) that each reference the default line template.

In addition to the default vty pool and default fault manager pool, you can also configure a user-defined vty pool that can reference the default template or a user-defined template.

When configuring vty pools, follow these guidelines:

• 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 fault manager vty pool.
• The vty range for fault 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 will fail 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 will fail.

How to Implement Physical and Virtual Terminals on Cisco IOS XR Software

Modifying Templates

This task explains how to modify the terminal attributes for the console and default line templates. The terminal attributes that you set will modify the template settings for the specified template.

SUMMARY STEPS

1.    configure

2.    line {console | default}

3.    Configure the terminal attribute settings for the specified template using the commands in line template configuration mode.

4.    Use one of the following commands:

• end
• commit

DETAILED STEPS

	Command or Action	Purpose
Step 1	configure Example: RP/0/0/CPU0:router# configure	Enters global configuration mode.
Step 2	line {console | default} Example: RP/0/0/CPU0:router(config)# line console or RP/0/0/CPU0:router(config)# line default	Enters line template configuration mode for the specified line template. console —Enters line template configuration mode for the console template. default —Enters line template configuration mode for the default line template.
Step 3	Configure the terminal attribute settings for the specified template using the commands in line template configuration mode.	—
Step 4	Use one of the following commands: end commit Example: RP/0/0/CPU0:router(config-line)# end or RP/0/0/CPU0:router(config-line)# commit	Saves configuration changes. When you issue the end command, the system prompts you to commit changes: Uncommitted changes found, commit them before exiting(yes/no/cancel)? [cancel]: Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode. Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes. Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes. Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Creating and Modifying vty Pools

This task explains how to create and modify vty pools.

You can omit 3 to 5 if you are configuring the default line template to reference a vty pool.

SUMMARY STEPS

1.    configure

2.    telnet {ipv4 | ipv6} server max-servers limit

3.    line template template-name

4.    Configure the terminal attribute settings for the specified line template using the commands in line template configuration mode.

5.    exit

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

7.    Use one of the following commands:

• end
• commit

DETAILED STEPS

	Command or Action	Purpose
Step 1	configure Example: RP/0/0/CPU0:router# configure	Enters global configuration mode.
Step 2	telnet {ipv4 | ipv6} server max-servers limit Example: RP/0/0/CPU0:router(config)# telnet ipv4 server max-servers 10	Specifies the number of allowable Telnet servers. Up to 100 Telnet servers are allowed. Note    By default no Telnet servers are allowed. You must configure this command in order to enable the use of Telnet servers.
Step 3	line template template-name Example: RP/0/0/CPU0:router(config)# line template 1	Enters line template configuration mode for a user-defined template.
Step 4	Configure the terminal attribute settings for the specified line template using the commands in line template configuration mode.	—
Step 5	exit Example: RP/0/0/CPU0:router(config-line)# exit	Exits line template configuration mode and returns the router to global configuration mode.
Step 6	vty-pool {default | pool-name | eem} first-vty last-vty [line-template {default | template-name}] Example: RP/0/0/CPU0:router(config)# vty-pool default 0 5 line-template default or RP/0/0/CPU0:router(config)# vty-pool pool1 5 50 line-template template1 or RP/0/0/CPU0:router(config)# vty-pool eem 100 105 line-template template1	Creates or modifies vty pools. If you do not specify a line template with the line-template keyword, a vty pool defaults to the default line template. default —Configures the default vty pool. The default vty pool must start at vty 0 and must contain a minimum of five vtys (vtys 0 through 4). You can resize the default vty pool by increasing the range of vtys that compose the default vty pool. pool-name —Creates a user-defined vty pool. A user-defined pool must start at least at vty 5, depending on whether the default vty pool has been resized. If the range of vtys for the default vty pool has been resized, use the first range value free from the default line template. For example, if the range of vtys for the default vty pool has been configured to include 10 vtys (vty 0 through 9), the range value for the user-defined vty pool must start with vty 10. eem —Configures the embedded event manager pool. The default embedded event manager vty pool must start at vty 100 and must contain a minimum of six vtys (vtys 100 through 105). line-template template-name —Configures the vty pool to reference a user-defined template.
Step 7	Use one of the following commands: end commit Example: RP/0/0/CPU0:router(config)# end or RP/0/0/CPU0:router(config)# commit	Saves configuration changes. When you issue the end command, the system prompts you to commit changes: Uncommitted changes found, commit them before exiting(yes/no/cancel)? [cancel]: Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode. Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes. Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes. Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Monitoring Terminals and Terminal Sessions

This task explains how to monitor terminals and terminal sessions using the show EXEC commands available for physical and terminal lines.

Note	The commands can be entered in any order.

SUMMARY STEPS

1.    (Optional) show line [aux location node-id | console location node-id | vty number]

2.    (Optional) show terminal

3.    (Optional) show users

DETAILED STEPS

	Command or Action	Purpose
Step 1	show line [aux location node-id | console location node-id | vty number] Example: RP/0/0/CPU0:router# show line	(Optional) Displays the terminal parameters of terminal lines. Specifying the show line aux location node-id EXEC command displays the terminal parameters of the auxiliary line. Specifying the show line console location node-id EXEC command displays the terminal parameters of the console. For the location node-id keyword and argument, enter the location of the Route Processor (RP) on which the respective auxiliary or console port resides. The node-id argument is expressed in the format of rack/slot/module . Specifying the show line vty number EXEC command displays the terminal parameters for the specified vty.
Step 2	show terminal Example: RP/0/0/CPU0:router# show terminal	(Optional) Displays the terminal attribute settings for the current terminal line.
Step 3	show users Example: RP/0/0/CPU0:router# show users	(Optional) Displays information about the active lines on the router.

Configuration Examples for Implementing Physical and Virtual Terminals

Modifying the Console Template: Example

This configuration example shows how to modify the terminal attribute settings for the console line template:

line console
  exec-timeout 0 0
  escape-character 0x5a 
  session-limit 10
  disconnect-character 0x59
  session-timeout 100
  transport input telnet
  transport output telnet
  

In this configuration example, the following terminal attributes are applied to the console line template:

• The EXEC time out for terminal sessions is set to 0 minutes, 0 seconds. Setting the EXEC timeout to 0 minutes and 0 seconds disables the EXEC timeout function; thus, the EXEC session for the terminal session will never time out.
• The escape character is set to the 0x5a hexadecimal value (the 0x5a hexadecimal value translates into the “Z” character).
• The session limit for outgoing terminal sessions is set to 10 connections.
• The disconnect character is set to 0x59 hexadecimal value (the 0x59 hexidecimal character translates into the “Y” character).
• The session time out for outgoing terminal sessions is set to 100 minutes (1 hour and 40 minutes).
• The allowed transport protocol for incoming terminal sessions is Telnet.
• The allowed transport protocol for outgoing terminal sessions is Telnet.

To verify that the terminal attributes for the console line template have been applied to the console, use the show line command:

RP/0/0/CPU0:router# show line console location 0/0/CPU0 
  
Tty             Speed     Modem  Uses   Noise Overruns           Acc I/O
*  con0/0/CPU0      9600        -     -       -      0/0               -/-

Line con0_0_CPU0, Location "Unknown", Type "Unknown"
Length: 24 lines, Width: 80 columns
Baud rate (TX/RX) is 9600, 1 parity, 2 stopbits, 8 databits
Template: console
Config: 
Allowed transports are telnet.
  

Modifying the Default Template: Example

This configuration example shows how to override the terminal settings for the default line template:

line default
  exec-timeout 0 0
  width 512
  length 512
  

In this example, the following terminal attributes override the default line template default terminal attribute settings:

• The EXEC timeout for terminal sessions is set to 0 minutes and 0 seconds. Setting the EXEC timeout to 0 minutes and 0 seconds disables the EXEC timeout function; thus, the EXEC session for the terminal session will never time out (the default EXEC timeout for the default line template is 10 minutes).
• The width of the terminal screen for the terminals referencing the default template is set to 512 characters (the default width for the default line template is 80 characters).
• The length, the number of lines that will display at one time on the terminal referencing the default template, is set to 512 lines (the default length for the default line template is 24 lines).

Configuring a User-Defined Template to Reference the Default vty Pool: Example

This configuration example shows how to configure a user-defined line template (named test in this example) for vtys and to configure the line template test to reference the default vty pool:

line template test
  exec-timeout 100 0
  width 100
  length 100
  exit
vty-pool default 0 4 line-template test

Configuring a User-Defined Template to Reference a User-Defined vty Pool: Example

This configuration example shows how to configure a user-defined line template (named test2 in this example) for vtys and to configure the line template test to reference a user-defined vty pool (named pool1 in this example):

line template test2
  exec-timeout 0 0
  session-limit 10
  session-timeout 100
  transport input all
  transport output all
  exit
vty-pool pool1 5 50 line-template test2

Configuring a User-Defined Template to Reference the Fault Manager vty Pool: Example

This configuration example shows how to configure a user-defined line template (named test3 in this example) for vtys and to configure the line template test to reference the fault manager vty pool:

line template test3
  width 110
  length 100
  session-timeout 100
  exit
  vty-pool eem 100 106 line-template test3

Additional References

The following sections provide references related to implementing physical and virtual terminals on Cisco IOS XR software.

Related Documents

Related Topic	Document Title
Cisco IOS XR terminal services commands	Terminal Services Commands on the Cisco IOS XR Software module of Cisco IOS XR System Management Command Reference for the Cisco XR 12000 Series Router
Cisco IOS XR command master index	Cisco IOS XR Commands Master List for the Cisco XR 12000 Series Router
Information about getting started with Cisco IOS XR software	Cisco IOS XR Getting Started Guide for the Cisco XR 12000 Series Router
Information about user groups and task IDs	Configuring AAA Services on the Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide for the Cisco XR 12000 Series Router

Standards

Standards	Title
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.	—

MIBs

MIBs	MIBs Link
—	To locate and download MIBs using Cisco IOS XR software, use the Cisco MIB Locator found at the following URL and choose a platform under the Cisco Access Products menu: http://cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

RFCs

RFCs	Title
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.	—

Technical Assistance

Description	Link
The Cisco Technical Support website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.	http://www.cisco.com/techsupport