Table Of Contents
L Commands
This chapter describes the Cisco NX-OS system management commands that begin with the letter L.
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
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to enable logging messages with a severity level of 4 (warning) or higher to the console session:
switch# configure terminalswitch(config)# logging console 4switch(config)#Related Commands
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
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to log interface events:
switch# configure terminalswitch(config)# logging event link-status defaultswitch(config)#Related Commands
logging ip access-list cache
Use the logging ip access-list cache command to configure the Optimized ACL Logging (OAL) parameters.
To reset to the default settings, use the no form of this command.
logging ip access-list cache {{entries num_entries} | {interval seconds} | {threshold num_packets}}
no logging ip access-list cache {{entries num_entries} | {interval seconds} | {threshold num_packets}}
Syntax Description
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to to specify the maximum number of log entries that are cached in the software:
switch# configure terminalswitch(config)# logging ip access-list cache entries 200switch(config)#This example shows how to specify the maximum time interval before an entry is sent to the system log:
switch# configure terminalswitch(config)# logging ip access-list cache interval 350switch(config)#This example shows how to specify the number of packet matches before an entry is sent to the system log:
switch# configure terminalswitch(config)# logging ip access-list cache threshold 125switch(config)#Related Commands
logging level
Use the logging level command to enable logging messages from the defined facility that have the specified severity level or higher.
To disable logging messages from the defined facility, use the no form of this command.
logging level facility severity-level
no logging level facility severity-level
Syntax Description
facility
Define the appropriate facility. The facilities are listed in the "System Message Logging Facilities" section on page 317.
To apply the same severity level to all facilities, use the all facility.
severity-level
The number of the desired severity level at which messages should be logged. Messages at or numerically lower than the specified level are logged. Severity levels are as follows:
•
0—emergency: System unusable
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•
•
•
•
•
•
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to enable logging messages from the AAA facility that have a severity level of 2 or higher:
switch# configure terminalswitch(config)# logging level aaa 2switch(config)#Related Commands
logging logfile
Use the logging logfile command to configure the name of the log file used to store system messages and the minimum severity level to log.
To disable logging to the log file, 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
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to configure a log file called logfile to store system messages and set its severity level to 4:
switch# configure terminalswitch(config)# logging logfile logfile 4switch(config)#Related Commands
logging module
Use the logging module command to enable module log messages. Set a specified severity level or use the default.
To disable module log messages, use the no form of this command.
logging module [severity-level]
no logging module
Syntax Description
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to enable module log messages:
switch# configure terminalswitch(config)# logging moduleswitch(config)#Related Commands
logging monitor
Use the logging monitor command to enable the device to log messages to the monitor (terminal line). This configuration applies to telnet and SSH sessions.
To disable monitor log messages, use the no form of this command.
logging monitor [severity-level]
no logging monitor
Syntax Description
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to enable monitor log messages:
switch# configure terminalswitch(config)# logging monitorswitch(config)#Related Commands
logging server
Use the logging server command to configure a Remote Syslog Server at the specified host name or IPv4/IPv6 address.
To disable the Remote Syslog Server, use the no form of this command.
logging server host [severity-level [use-vrf VRF_name [facility {auth | authpriv | cron | daemon | ftp | kernel | local0 | local1 | local2 | local3 | local4 | local5 | local6 | local7 | lpr | mail | news | syslog | user | uucp}]]]
no logging server host
Syntax Description
host
Configure the host name or IPv4/IPv6 address of the Remote Syslog Server.
severity-level
(Optional) The number of the desired severity level at which messages should be logged. Messages at or numerically lower than the specified level are logged. Severity levels are as follows:
•
•
•
•
•
•
•
•
use-vrf VRF_name
(Optional) Enable VPN routing and forwarding (VRF) and create a VRF instance named VRF_name.
facility facility
(Optional) Define the appropriate outgoing facility. The facilities are listed in the "System Message Logging Facilities" section on page 317.
The default outgoing facility is local7.
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to configure a Remote Syslog Server at a specified IPv4 address, using the default outgoing facility:
switch# configure terminalswitch(config)# logging server 172.28.254.253switch(config)#This example shows how to configure a Remote Syslog Server at a specified host name, with severity level 5 or higher:
switch# configure terminalswitch(config)# logging server syslogA 5switch(config)#Related Commands
logging source-interface
Use the logging source-interface command to enable a source interface for the Remote Syslog Server.
To disable the source interface, use the no form of this command.
logging source-interface loopback virtual_interface
no logging source-interface loopback virtual_interface
Syntax Description
loopback virtual_interface
Enable the loopback interface selecting the virtual interface number from 0 to 1023.
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to enable a source interface for the syslog server:
switch# configure terminalswitch(config)# logging source-interface loopback 5switch(config)#logging timestamp
Use the logging timestamp command to set the logging timestamp units. By default, the units are seconds.
To reset the logging timestamp units to the default, use the no form of this command.
logging timestamp {microseconds | milliseconds | seconds}
no logging timestamp {microseconds | milliseconds | seconds}
Syntax Description
microseconds | milliseconds | seconds
Select the units to use for logging timestamps. The default units are seconds.
Defaults
None
Command Modes
Global configuration
Supported User RolesSuper user
VDC administrator
VDC userCommand History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to set the logging timestamp units to microseconds:
switch# configure terminalswitch(config)# logging timestamp microsecondsswitch(config)#Related Commands
match (NetFlow)
To specify match criteria for Flexible NetFlow flow records, use the match flow record configuration mode subcommand. To remove match criteria for Flexible NetFlow flow records, use the no form of this command.
match {flow direction | interface {input | output} | ip {protocol | tos} | ipv4 {destination address | source address} | transport {destination-port | source-port}}
match {flow direction | interface {input | output} | ip {protocol | tos} | ipv4 {destination address | source address} | transport {destination-port | source-port}}
Syntax Description
Command Default
No matching criteria are specified by default.
Command Modes
Flow record configuration
Supported User Rolesnetwork-admin
vdc-adminCommand History
Usage Guidelines
A Flexible NetFlow flow record must be enabled before you can use the match command.
This command does not require a license.
Examples
The following example shows how to specify the direction of the flow to be matched:
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match flow directionSpecifies that the match criterion is based on the input interface.
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match interface inputSpecifies that the match criterion is based on the output interface.
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match interface outputSpecifies that the match criterion is based on protocol.
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match ip protocolSpecifies that the match criterion is based on type of service (ToS).
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match ip tosSpecifies that the match criterion is based on the destination IPv4 address.
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match ipv4 destination addressSpecifies that the match criterion is based on the source IPv4 address.
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match ipv4 source addressSpecifies that the match criterion for transport layer fields is based on the destination port.
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match ipv4 transport destination-portSpecifies that the match criterion for transport layer fields is based on the source port.
switch(config)# flow record FLOW-RECORD-1switch(config-flow-record)# match ipv4 transport source-portRelated Commands