L Commands

This chapter describes the Cisco Nexus 1000V commands that begin with the letter L.

line console

To enter console configuration mode, use the line console command. To exit console configuration mode, use the no form of this command.

line console

no line console

Syntax Description

This command has no arguments or keywords.

Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Examples

This example shows how to enter console configuration mode: 

n1000v# configure terminal

n1000v(config)# line console

n1000v(config-console)#

line vty

To enter line configuration mode, use the line vty command. To exit line configuration mode, use the no form of this command.

line vty

no line vty

Syntax Description

This command has no arguments or keywords.

Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Examples

This example shows how to enter line configuration mode: 

n1000v# configure terminal

n1000v(config)# line vty

n1000v(config-line)#

logging console

Use the logging console command to enable logging messages to the console session.

To disable logging messages to the console session, use the no form of this command.

logging console [severity-level]

no logging console

Syntax Description

severity-level

The severity level at which you want messages to be logged. When you set a severity level, for example 4, then messages at that severity level and higher
(0 through 4) are logged.

Severity levels are as follows:

Level
Designation
Definition

0

Emergency

System unusable   *the highest level*

1

Alert

Immediate action needed

2

Critical

Critical condition—default level

3

Error

Error condition

4

Warning

Warning condition

5

Notification

Normal but significant condition

6

Informational

Informational message only

7

Debugging

Appears during debugging only


Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to enable logging messages with a severity level of 4 (warning) or higher to the console session: 

n1000v# configure terminal 

n1000v(config)# logging console 4 

n1000v(config)#

Related Commands

Command
Description

show logging console

Displays the console logging configuration.


logging event

Use the logging event command to log interface events.

logging event {link-status | trunk-status} {enable | default}

no logging event {link-status | trunk-status} {enable | default}

Syntax Description

link-status

Log all up/down and change status messages.

trunk-status

Log all trunk status messages.

default

The default logging configuration is used.

enable

Enables interface logging to override the port level logging configuration.


Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to log interface events: 

n1000v# configure terminal 

n1000v(config)# logging event link-status default 

n1000v(config)#

Related Commands

Command
Description

show logging

Displays the logging configuration and contents of logfile.


logging level

Use the logging level command to enable the logging of messages as follows:

•from a named facility (such as license or aaa)

•of a specified severity level or higher

To disable the logging of messages, use the no form of this command.

logging level facility severity-level

no logging level facility severity-level

Syntax Description

facility

Names the facility.

severity-level

The severity level at which you want messages to be logged. When you set a severity level, for example 4, then messages at that severity level and higher
(0 through 4) are logged.

Severity levels are as follows:

Level
Designation
Definition

0

Emergency

System unusable   *the highest level*

1

Alert

Immediate action needed

2

Critical

Critical condition—default level

3

Error

Error condition

4

Warning

Warning condition

5

Notification

Normal but significant condition

6

Informational

Informational message only

7

Debugging

Appears during debugging only


Defaults

None

Command Modes

Global Configuration

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

To apply the same severity level to all facilities, use the following command:

•logging level all level_number

To list the available facilities for which messages can be logged, use the following command:

•logging level ?

Examples

This example shows how to enable logging messages from the AAA facility that have a severity level of 0 through 2: 

n1000v# configure terminal 

n1000v(config)# logging level aaa 2 

n1000v(config)#

This example shows how to enable logging messages from the license facility with a severity level of
0 through 4; and then display the license logging configuration: 

n1000v# configure terminal 

n1000v(config)# logging level license 4 

n1000v(config)# show logging level license

Facility        Default Severity        Current Session Severity

--------        ----------------        ------------------------

licmgr                  6                       4


0(emergencies)          1(alerts)       2(critical)

3(errors)               4(warnings)     5(notifications)

6(information)          7(debugging)


n1000v(config)#

Related Commands

Command
Description

show logging level

Displays the facility logging level configuration.

logging level ?

Lists the available facilities for which messages can be logged.


logging logfile

Use the logging logfile command to configure the log file used to store system messages.

To remove a configuration, use the no form of this command.

logging logfile logfile-name severity-level [size bytes]

no logging logfile [logfile-name severity-level [size bytes]]]

Syntax Description

logfile-name

Specifies the name of the log file that stores system messages.

severity-level

The severity level at which you want messages to be logged. When you set a severity level, for example 4, then messages at that severity level and higher
(0 through 4) are logged.

Severity levels are as follows:

Level
Designation
Definition

0

Emergency

System unusable   *the highest level*

1

Alert

Immediate action needed

2

Critical

Critical condition—default level

3

Error

Error condition

4

Warning

Warning condition

5

Notification

Normal but significant condition

6

Informational

Informational message only

7

Debugging

Appears during debugging only

size bytes

(Optional) Specifies the log file size in bytes, from 4096 to 10485760 bytes.

The default file size is 10485760 bytes.


Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to configure a log file named logfile to store system messages and set its severity level to 4: 

n1000v# config t 

n1000v(config)# logging logfile logfile 4 

n1000v(config)#

Related Commands

Command
Description

show logging logfile

Displays the contents of the log file.


logging module

To start logging of module messages to the log file, use the logging module command. To stop module log messages, use the no form of this command.

logging module [severity]

no logging module [severity]

Syntax Description

severity-level

The severity level at which you want messages to be logged. If you do not specify a severity level, the default is used. When you set a severity level, for example 4, then messages at that severity level and higher (0 through 4) are logged.

Severity levels are as follows:

Level
Designation
Definition

0

Emergency

System unusable   *the highest level*

1

Alert

Immediate action needed

2

Critical

Critical condition—default level

3

Error

Error condition

4

Warning

Warning condition

5

Notification

Normal but significant condition (the default)

6

Informational

Informational message only

7

Debugging

Appears during debugging only


Defaults

Disabled

If you start logging of module messages, and do not specify a severity, then the default is used, Notification (5).

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to start logging of module messages to the log file at the default severity level (severity 4): 

n1000v# configure terminal 

n1000v(config)# logging module 

n1000v(config)#


This example shows how to stop the logging of module messages to the log file: 

n1000v# configure terminal 

n1000v(config)# no logging module

n1000v#

Related Commands

Command
Description

show logging module

Displays the current configuration for logging module messages to the log file.


logging monitor

Use the logging monitor command to enable the logging of messages to the monitor (terminal line). This configuration applies to telnet and SSH sessions.

To disable monitor logging, use the no form of this command.

logging monitor [severity-level]

no logging monitor

Syntax Description

severity-level

The severity level at which you want messages to be logged. If you do not specify a severity level, the default is used. When you set a severity level, for example 4, then messages at that severity level and higher (0 through 4) are logged.

Severity levels are as follows:

Level
Designation
Definition

0

Emergency

System unusable   *the highest level*

1

Alert

Immediate action needed

2

Critical

Critical condition—default level

3

Error

Error condition

4

Warning

Warning condition

5

Notification

Normal but significant condition (the default)

6

Informational

Informational message only

7

Debugging

Appears during debugging only


Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

Network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to enable monitor log messages: 

n1000v# configure terminal 

n1000v(config)# logging monitor 

n1000v(config)#

Related Commands

Command
Description

show logging monitor

Displays the monitor logging configuration.


logging server

Use the logging server command to designate and configure a remote server for logging system messages. Use the no form of this command to remove or change the configuration,

logging server host0 [i1 [use-vrf s0 [facility {auth | authpriv | cron | daemon | ftp | kernel | local0 | local1 | local2 | local3 | local4 | local5 | local6 | local7 | lpr | mail | news | syslog | user | uucp}]]]

no logging server host0 [i1 [use-vrf s0 [facility {auth | authpriv | cron | daemon | ftp | kernel | local0 | local1 | local2 | local3 | local4 | local5 | local6 | local7 | lpr | mail | news | syslog | user | uucp}]]]

Syntax Description

host0

Hostname/IPv4/IPv6 address of the Remote Syslog Server.

i1

(Optional) 0-emerg;1-alert;2-crit;3-err;4-warn;5-notif;6-inform;7-debug.

use-vrf s0

(Optional) Enter VRF name, default is management + VRF name,default management.

facility

(Optional) Facility to use when forwarding to server.

auth

Use auth facility.

authpriv

Use authpriv facility.

cron

Use Cron/at facility.

daemon

Use daemon facility.

ftp

Use file transfer system facility.

kernel

Use kernel facility.

local0

Use local0 facility.

local1

Use local1 facility.

local2

Use local2 facility.

local3

Use local3 facility.

local4

Use local4 facility.

local5

Use local5 facility.

local6

Use local6 facility.

local7

Use local7 facility.

lpr

Use lpr facility.

mail

Use mail facility.

news

Use USENET news facility.

syslog

Use syslog facility.

user

Use user facility.

uucp

Use Unix-to-Unix copy system facility.


Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to configure a remote syslog server at a specified IPv4 address, using the default outgoing facility: 

n1000v# configure terminal 

n1000v(config)# logging server 172.28.254.253 

n1000v(config)#

This example shows how to configure a remote syslog server at a specified host name, with severity level 5 or higher: 

n1000v# configure terminal 

n1000v(config)# logging server syslogA 5 

n1000v(config)#


Related Commands

Command
Description

show logging server

Displays the current server configuration for logging system messages.


logging timestamp

To set the unit of measure for the system messages timestamp, use the logging timestamp command. To restore the default unit of measure, use the no form of this command.

logging timestamp {microseconds | milliseconds | seconds}

no logging timestamp {microseconds | milliseconds | seconds}

Syntax Description

microseconds

Timestamp in micro-seconds.

milliseconds

Timestamp in milli-seconds.

seconds

Timestamp in seconds (Default).


Defaults

Seconds

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to set microseconds as the unit of measure for the system messages timestamp: 

n1000v# configure terminal 

n1000v(config)# logging timestamp microseconds 

n1000v(config)#

Related Commands

Command
Description

show logging timestamp

Displays the logging timestamp configuration.