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Cisco IOS XE SD-WAN Qualified Command Reference

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Book Title

Cisco IOS XE SD-WAN Qualified Command Reference

Chapter Title

Line Commands

Results

Updated:
May 10, 2022

Chapter: Line Commands

Line Commands

line

To identify a specific line for configuration and enter line configuration collection mode, use the line command in global configuration mode. To remove configuration from a specific line, use the no form of this command.

line { con 0 | vty line-number }

no line { con 0 | vty line-number }

con 0

Console 0 terminal line. The console port is DCE.

vty

Virtual terminal line for remote console access.

line-number

Relative number of the virtual terminal line (or the first line in a contiguous group) that you want to configure when the line type is specified. Numbering begins with zero.

You can either configure a single line or a range.

Command Default

There is no default line.

Command Modes

Global configuration

Command History

Release

Modification

Cisco IOS XE Release 17.2.1v

Command qualified for use in Cisco vManage CLI templates.

Usage Guidelines

For usage guidelines, see the Cisco IOS line command.

The terminal from which you locally configure the router is attached to the console port. To configure line parameters for the console port, enter the following: 

line console 0

The following example starts configuration for virtual terminal lines 0 to 4:

line vty 0 4

line con transport

To set transport output parameters for line console 0, use the transport command in line console 0 configuration mode. To remove transport parameters for line console 0, use the no form of this command.

transport { output [ aceron | all | lapb-ta | lat | mop | nasi | none | pad | rlogin | ssh | telnet | udptn | v120 ] }

no transport { output [ aceron | all | lapb-ta | lat | mop | nasi | none | pad | rlogin | ssh | telnet | udptn | v120 ] }

Table 1. Syntax Description
output

Defines the protocols that can be used from outgoing connections line.
aceron

(Optional) Selects the remote console for Application Control Engine (ACE)-based blade.
all

Assigns the device or interface as the designated-gateway for the domain.
lapb-ta

(Optional) Selects the ISDN link access procedure, balanced-terminal adapter protocol.
lat

(Optional) Selects the digital local-area transport (LAT) protocol and specifies both incoming reverse LAT and host-initiated connections.

mop

(Optional) Selects Maintenance Operation Protocol (MOP).
nasi

(Optional) Selects NetWare Access Servers Interface (NASI) as the input transport protocol.
none

Prevents any protocol selection on the line. This makes the port unusable by incoming connections.
pad

(Optional) Selects X.3 packet assembler/disassembler (PAD) incoming connections.
rlogin

(Optional) Selects the UNIX rlogin protocol.
ssh

(Optional) Selects the Secure Shell (SSH) protocol.
telnet

(Optional) Specifies all types of incoming TCP/IP connections.
udptn

(Optional) Specifies the asynchronous data that is sent through UDP Telnet (UDPTN).
v120

(Optional) Selects the v120 protocol for incoming asynchronous connections over ISDN.

Command Default

SSH is enabled for incoming connections by default on VTY lines only.

Command Modes

Line console configuration (config-line).

Command History

Release Modification

Cisco IOS XE Release 17.2.1v

Command qualified for use in Cisco vManage CLI templates.

Usage Guidelines

You can specify one protocol, multiple protocols, all protocols, or no protocols. To specify multiple protocols, enter the keyword for each protocol, separated by a space under any line configuration mode.

Examples

The following example shows how to configure the line console 0 to only allow ssh connections from the console 0 interface.

Device(config)# line console 0
Device(config-line)# transport output ssh

line vty transport

To set transport input and output parameters for line vty 0 4, use the transport command in line vty 0 4 configuration mode. To remove transport parameters for line vty 0 4, use the no form of this command.

transport { input [ aceron | all | lapb-ta | lat | mop | nasi | none | pad | rlogin | ssh | telnet | udptn | v120 ] | output [ aceron | all | lapb-ta | lat | mop | nasi | none | pad | rlogin | ssh | telnet | udptn | v120 ] }

no transport { input [ aceron | all | lapb-ta | lat | mop | nasi | none | pad | rlogin | ssh | telnet | udptn | v120 ] | output [ aceron | all | lapb-ta | lat | mop | nasi | none | pad | rlogin | ssh | telnet | udptn | v120 ] }

Table 2. Syntax Description
input

Defines the protocols to be used to connect to a specific line of the router.
output

Defines the protocols that can be used for outgoing connections from line.
aceron

(Optional) Selects the remote console for Application Control Engine (ACE)-based blade.
all

Assigns the device or interface as the designated-gateway for the domain.
lapb-ta

(Optional) Selects the ISDN link access procedure, balanced-terminal adapter protocol.
lat

(Optional) Selects the digital local-area transport (LAT) protocol and specifies both incoming reverse LAT and host-initiated connections.

mop

(Optional) Selects Maintenance Operation Protocol (MOP).
nasi

(Optional) Selects NetWare Access Servers Interface (NASI) as the input transport protocol.
none

Prevents any protocol selection on the line. This makes the port unusable by incoming connections.
pad

(Optional) Selects X.3 packet assembler/disassembler (PAD) incoming connections.
rlogin

(Optional) Selects the UNIX rlogin protocol.
ssh

(Optional) Selects the Secure Shell (SSH) protocol.
telnet

(Optional) Specifies all types of incoming TCP/IP connections.
udptn

(Optional) Specifies the asynchronous data that is sent through UDP Telnet (UDPTN).
v120

(Optional) Selects the v120 protocol for incoming asynchronous connections over ISDN.

Command Default

SSH is enabled for incoming connections on VTY lines.

Command Modes

Line VTY configuration (config-line).

Command History

Release Modification

Cisco IOS XE Release 17.2.1v

Command qualified for use in Cisco vManage CLI templates.

Usage Guidelines

You can specify one protocol, multiple protocols, all protocols, or no protocols. To specify multiple protocols, enter the keyword for each protocol, separated by a space under any line configuration mode.

Examples

The following example shows how to configure the line vty 0 4 to only allow ssh connections.

Device(config)#line vty 0 4
Device(config-line)#transport input ssh

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