The device supports the FIPS mode that complies with NIST FIPS 140-2 requirements. Support for features, commands, and parameters might differ in FIPS mode and non-FIPS mode. For more information about FIPS mode, see Security Configuration Guide.

diagnostic-logfile save

Use diagnostic-logfile save to manually save diagnostic logs from the diagnostic log file buffer to the diagnostic log file.

Syntax

diagnostic-logfile save

Views

Any view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

You can specify the directory to save the diagnostic log file by using the info-center diagnostic-logfile directory command.

The system clears the diagnostic log file buffer after saving the buffered diagnostic logs to the diagnostic log file.

If the diagnostic log file buffer is empty, this command displays a success message event though no logs are saved to the diagnostic log file.

Examples

# Manually save diagnostic logs from the diagnostic log file buffer to the diagnostic log file.

<Sysname> diagnostic-logfile save

The contents in the diagnostic log file buffer have been saved to the file flash:/diagfile/diagfile.log.

Related commands

info-center diagnostic-logfile enable

info-center diagnostic-logfile directory

display diagnostic-logfile summary

Use display diagnostic-logfile summary to display the diagnostic log file configuration.

Syntax

display diagnostic-logfile summary

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Examples

# Display the diagnostic log file configuration.

<Sysname> display diagnostic-logfile summary

Diagnostic log file: Enabled.

Diagnostic log file size quota: 10 MB

Diagnostic log file directory: flash:/diagfile

Writing frequency: 24 hour 0 min 0 sec

Table 1 Command output

Field	Description
Diagnostic log file	Status of the diagnostic log file: · Enabled—Diagnostic logs can be output to the diagnostic log file. · Disabled—Diagnostic logs cannot be output to the diagnostic log file.
Diagnostic log file size quota	Maximum size for the diagnostic log file, in MB.
Log file directory	Directory where the diagnostic log file is saved.
Writing frequency	Interval at which the system saves diagnostic logs from the buffer to the diagnostic log file.

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display info-center

Use display info-center to display information center configuration.

Syntax

display info-center

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Examples

# Display information center configuration.

<Sysname> display info-center

Information Center: Enabled

Console: Enabled

Monitor: Enabled

Log host: Enabled

192.168.0.1, log output filter: loghost1,

port number: 5000, host facility: local7

Log buffer: Enabled

Max buffer size 1024, current buffer size 512,

Current messages 0, dropped messages 0, overwritten messages 0

Log file: Enabled

Security log file: Enabled

Information timestamp format:

Log host: Date

Other output destination: Date

display info-center filter

Use display info-center filter to display information about log output filters.

Syntax

display info-center filter [ filter-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

filter-name: Specifies an existing log output filter by its name. If you do not specify a log output filter, this command displays information about all log output filters.

Examples

# Display information about log output filter loghost1.

<Sysname> display info-center filter loghost1

Log output filter: loghost1

Module Rule

ARP Debugging

CFGLOG Deny

Default Informational

Table 2 Command output

Field	Description
Log output filter:	Name of the log output filter.
Module	Module to which the log output filter applies.
Rule	Rules in the log output filter.

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Related commands

info-center filter

display logbuffer

Use display logbuffer to display log buffer information and buffered logs.

Syntax

In standalone mode:

display logbuffer [ reverse ] [ level severity | size buffersize | slot slot-number ] * [ last-mins mins ]

In IRF mode:

display logbuffer [ reverse ] [ level severity | size buffersize | chassis chassis-number slot slot-number ] * [ last-mins mins ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

reverse: Displays log entries chronologically, with the most recent entry at the top. If you do not specify this keyword, the command displays log entries chronologically, with the oldest entry at the top.

level severity: Specifies a severity level in the range of 0 to 7. If you do not specify a severity level, this command displays log information for all levels.

Table 3 Log levels

Severity value	Level	Description	Keyword in commands
0	Emergency	The system is unusable. For example, the system authorization has expired.	emergency
1	Alert	Action must be taken immediately. For example, traffic on an interface exceeds the upper limit.	alert
2	Critical	Critical condition. For example, the device temperature exceeds the upper limit, the power module fails, or the fan tray fails.	critical
3	Error	Error condition. For example, the link state changes.	error
4	Warning	Warning condition. For example, an interface is disconnected, or the memory resources are used up.	warning
5	Notification	Normal but significant condition. For example, a terminal logs in to the device, or the device reboots.	notification
6	Informational	Informational message. For example, a command or a ping operation is executed.	informational
7	Debugging	Debugging message.	debugging

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size buffersize: Specifies the number of latest logs to be displayed. The value range is 1 to 1024. If you do not specify this option, the command displays all logs in the log buffer.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays information for all cards. (In standalone mode.)

chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. If you do not specify a card, this command displays information for all cards. (In IRF mode.)

last-mins mins: Displays logs buffered over the last specified period of time. The mins argument specifies a time period in the range of 1 to 43200 minutes. If you do not specify a time period, the command displays all logs in the log buffer.

Examples

# Display log buffer information and buffered logs.

<Sysname> display logbuffer

Log buffer: Enabled

Max buffer size: 1024

Actual buffer size: 512

Dropped messages: 0

Overwritten messages: 718

Current messages: 512

%Jun 17 15:57:09:578 2019 Sysname SYSLOG/7/SYS_RESTART:System restarted --

…

# Display log buffer information and logs buffered over the last 5 minutes.

<Sysname> display logbuffer last-mins 5

Log buffer: Enabled

Max buffer size: 1024

Actual buffer size: 512

Dropped messages: 0

Overwritten messages: 0

Current messages: 191

%Jan 1 01:00:06:784 2019 Sysname SHELL/6/SHELL_CMD: -Line=vty0-IPAddr=192.168.1.242-User=**; Command is display current-configuration

%Jan 1 01:03:19:691 2019 Sysname SHELL/5/SHELL_LOGIN: VTY logged in from 192.168.1.33.

%Jan 1 01:03:21:269 2019 Sysname SHELL/6/SHELL_CMD: -Line=vty1-IPAddr=192.168.1.33-User=**; Command is display logbuffer last-mins 5

Table 4 Command output

Field	Description
Log buffer	Status of the log buffer: · Enabled—Logs can be output to the log buffer. · Disabled—Logs cannot be output to the buffer.
Max buffer size	Maximum buffer size supported by the system.
Actual buffer size	Maximum buffer size configured by using the info-center logbuffer size command.
Dropped messages	Number of dropped messages.
Overwritten messages	Number of overwritten messages.
Current messages	Number of current messages.
Failed to obtain the specified data. The following tries to display all data in the log buffer.	The device fails to obtain the data from the database because of abnormal interaction with the database. Then all data in the log buffer will be displayed.

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Related commands

info-center logbuffer

reset logbuffer

display logbuffer summary

Use display logbuffer summary to display the log buffer summary.

Syntax

In standalone mode:

display logbuffer summary [ level severity | slot slot-number ] *

In IRF mode:

display logbuffer summary [ level severity | chassis chassis-number slot slot-number ] *

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

level severity: Specifies a severity level in the range of 0 to 7. If you do not specify a severity level, this command displays log information of all levels in the log buffer. For more information about log levels, see Table 3.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays information for all cards. (In standalone mode.)

Usage guidelines

This command displays only the summary of the general log buffer.

Examples

# (In standalone mode.) Display the summary of the log buffer.

<Sysname> display logbuffer summary

Slot CPU EMERG ALERT CRIT ERROR WARN NOTIF INFO DEBUG

1 0 0 0 0 7 0 34 38 0

Table 5 Command output

Field	Description
EMERG	Represents emergency. For more information, see Table 3.
ALERT	Represents alert. For more information, see Table 3.
CRIT	Represents critical. For more information, see Table 3.
ERROR	Represents error. For more information, see Table 3.
WARN	Represents warning. For more information, see Table 3.
NOTIF	Represents notification. For more information, see Table 3.
INFO	Represents informational. For more information, see Table 3.
DEBUG	Represents debugging. For more information, see Table 3.

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display logfile buffer

Use display logfile buffer to display the content of the log file buffer.

Syntax

display logfile buffer

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Usage guidelines

The system saves logs to the log file buffer before the logs are saved to the log file automatically or manually.

After saving the buffered logs to the log file, the system clears the log file buffer.

Examples

# Display the content of the log file buffer.

<Sysname> display logfile buffer

%@356%Dec 13 16:53:45:495 2019 H3C SHELL/6/SHELL_CMD: -Line=con0-IPAddr=**-User=**; Command is logfile save.

Related commands

info-center logfile frequency

logfile save

display logfile summary

Use display logfile summary to display the log file configuration.

Syntax

display logfile summary

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Usage guidelines

This command displays only the general log file configuration.

Examples

# Display the log file configuration.

<Sysname> display logfile summary

Log file: Enabled.

Log file size quota: 2 MB

Log file directory: flash:/logfile

Writing frequency: 24 hour 0 min 10 sec

Table 6 Command output

Field	Description
Log file	Log file status: · Enabled—Logs can be output to the log file. · Disabled—Logs cannot be output to the log file.
Log file size quota	Maximum log file size, in MB.
Log file directory	Log file directory.
Writing frequency	Log file writing frequency.

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display security-logfile buffer

Use display security-logfile buffer to display the content of the security log file buffer.

Syntax

display security-logfile buffer

Views

Any view

Predefined user roles

security-audit

Usage guidelines

The system saves security logs to the security log file buffer before the logs are saved to the security log file automatically or manually.

After saving the buffered security logs to the security log file, the system clears the security log file buffer.

To use this command, a local user must have the security-audit user role. For information about configuring the security-audit user role, see AAA commands in Security Command Reference.

Examples

# Display the content of the security log file buffer.

<Sysname> display security-logfile buffer

%@1%Sep 17 11:13:16:609 2019 Sysname SHELL/5/SHELL_LOGIN: Console logged in from con0.

Related commands

info-center security-logfile frequency

security-logfile save

display security-logfile summary

Use display security-logfile summary to display the summary of the security log file.

Syntax

display security-logfile summary

Views

Any view

Predefined user roles

security-audit

Usage guidelines

To use this command, a local user must have the security-audit user role. For information about configuring the security-audit user role, see AAA commands in Security Command Reference.

Examples

# Display the summary of the security log file.

<Sysname> display security-logfile summary

Security log file: Enabled

Security log file size quota: 10 MB

Security log file directory: flash:/seclog

Alarm threshold: 80%

Current usage: 30%

Writing frequency: 24 hour 0 min 0 sec

Table 7 Command output

Field	Description
Security log file	Status of the security log file: · Enabled—Security logs can be output to the security log file. · Disabled—Security logs cannot be output to the security log file.
Security log file size quota	Maximum storage space reserved for the security log file.
Security log file directory	Security log file directory.
Alarm threshold	Alarm threshold of the security log file usage.
Current usage	Current usage of the security log file.
Writing frequency	Security log file writing frequency.

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Related commands

authorization-attribute (Security Command Reference)

enable log updown

Use enable log updown to enable an interface to generate link up or link down logs when the interface state changes.

Use undo enable log updown to disable an interface from generating link up or link down logs when the interface state changes.

Syntax

enable log updown

undo enable log updown

Default

All interfaces are allowed to generate link up and link down logs.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Examples

# Disable Ten-GigabitEthernet 1/0/1 from generating link up or link down logs.

<Sysname> system-view

[Sysname] interface ten-gigabitethernet 1/0/1

[Sysname-Ten-GigabitEthernet1/0/1] undo enable log updown

info-center diagnostic-logfile directory

Use info-center diagnostic-logfile directory to configure the directory to save the diagnostic log file.

Syntax

info-center diagnostic-logfile directory dir-name

Default

The diagnostic log file directory is flash:/diagfile.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

dir-name: Specifies a directory by its name, a string of 1 to 64 characters.

Usage guidelines

The specified directory must have been created.

(In standalone mode.) The device uses the default diagnostic log file directory after a reboot or an active/standby MPU switchover.

(In IRF mode.) The device uses the default diagnostic log file directory after an IRF reboot or a global active/standby MPU switchover in an IRF fabric.

Examples

# Set the diagnostic log file directory to flash:/test.

<Sysname> mkdir test

Creating directory flash:/test... Done.

<Sysname> system-view

[Sysname] info-center diagnostic-logfile directory flash:/test

info-center diagnostic-logfile enable

Use info-center diagnostic-logfile enable to enable saving diagnostic logs to the diagnostic log file.

Use undo info-center diagnostic-logfile enable to disable saving diagnostic logs to the diagnostic log file.

Syntax

info-center diagnostic-logfile enable

undo info-center diagnostic-logfile enable

Default

Saving diagnostic logs to the diagnostic log file is enabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command enables saving diagnostic logs to the diagnostic log file for centralized management. Users can view the diagnostic logs to monitor device activities and to troubleshoot problems.

Examples

# Enable saving diagnostic logs to the diagnostic log file.

<Sysname> system-view

[Sysname] info-center diagnostic-logfile enable

info-center diagnostic-logfile frequency

Use info-center diagnostic-logfile frequency to configure the interval at which the system saves diagnostic logs from the diagnostic log file buffer to the diagnostic log file.

Use undo info-center diagnostic-logfile frequency to restore the default.

Syntax

info-center diagnostic-logfile frequency freq-sec

undo info-center diagnostic-logfile frequency

Default

The diagnostic log file saving interval is 86400 seconds.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

freq-sec: Specifies the diagnostic log file saving interval in seconds. The value range is 10 to 86400.

Usage guidelines

The system outputs diagnostic logs to the diagnostic log file buffer, and then saves the buffered logs to the diagnostic log file at the specified interval.

Examples

# Set the diagnostic log file saving interval to 600 seconds.

<Sysname> system-view

[Sysname] info-center diagnostic-logfile frequency 600

Related commands

info-center diagnostic-logfile enable

info-center diagnostic-logfile quota

Use info-center diagnostic-logfile quota to set the maximum size for the diagnostic log file.

Use undo info-center diagnostic-logfile quota to restore the default.

Syntax

info-center diagnostic-logfile quota size

undo info-center diagnostic-logfile quota

Default

The maximum diagnostic log file size is 5 MB.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

size: Specifies the maximum size for the diagnostic log file, in MB. The value range is 1 to 10.

Examples

# Set the maximum size to 6 MB for the diagnostic log file.

<Sysname> system-view

[Sysname] info-center diagnostic-logfile quota 6

info-center enable

Use info-center enable to enable the information center.

Use undo info-center enable to disable the information center.

Syntax

info-center enable

undo info-center enable

Default

The information center is enabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Examples

# Enable the information center.

<Sysname> system-view

[Sysname] info-center enable

Information center is enabled.

info-center filter

Use info-center filter to create a log output filter.

Syntax

info-center filter filter-name { module-name | default } { deny | level severity }

undo info-center filter filter-name [ module-name | default ]

Default

No log output filters exist.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

filter-name: Specifies a name for the log output filter, a case-insensitive string of 1 to 8 characters.

module-name: Specifies a module by its name. To view the names of supported modules, execute the info-center filter filter-name ? command.

default: Specifies all supported modules.

deny: Disables log output.

level severity: Specifies a log severity level by its name. Supported severity levels are alert, critical, debugging, emergency, error, informational, notification, and warning. See Table 3 for more information about the log severity levels. The log output filter applies to logs of the specified severity level and all higher levels.

Usage guidelines

A log output filter contains a set of log output filter rules for modules. You can use this command to create multiple log output filters. When specifying a log host, you can apply a log output filter to control log output to the log host.

You can also use the info-center source command to configure log output rules for the log host output destination. The system chooses the settings to control log output to a log host in the following order:

1. Log output filter specified for the log host by using the info-center loghost command.

2. Log output rules configured for the log host output destination by using the info-center source command.

3. Default log output rules (see Table 8).

Follow these restrictions and guidelines when you configure a log output filter:

· To set a log output filter rule for a module, use the module-name argument to specify the module name.

If you set log output filter rules for the same module multiple times, the most recent configuration takes effect.

· To set a general log output filter rule for all modules, use the default keyword. The general log output filter rule applies to all modules that do not have module-specific filter rules.

If you set a general log output filter rule multiple times, the most recent configuration takes effect.

· If no general log output filter rule is set, the system outputs logs with severity levels informational through alert for modules that do not have module-specific filter rules.

· To remove a module-specific log output filter rule, you must use the module-name argument. If you do not specify any parameters, the entire log output filter is deleted.

Examples

# Create log output filter loghost1. In the log output filter, enable the ARP module to output logs with severity levels notification through alert, the SNMP module to output logs with severity levels warning through alert, and disable log output of all other modules.

<Sysname> system-view

[Sysname] info-center filter loghost1 arp level notification

[Sysname] info-center filter loghost1 snmp level warning

[Sysname] info-center filter loghost1 default deny

Related commands

display info-center filter

info-center loghost

info-center source

info-center format

Use info-center format to set the format for logs sent to log hosts.

Use undo info-center format to restore the default.

Syntax

info-center format { cmcc | rfc5424 | sgcc | unicom }

undo info-center format

Default

Logs are sent to log hosts in non-customized format.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

cmcc: Specifies the China Mobile Communications Corporation (CMCC) format.

rfc5424: Specifies the RFC 5424 format.

sgcc: Specifies the State Grid Corporation of China (SGCC) format.

unicom: Specifies the China Unicom format.

Usage guidelines

Logs can be sent to log hosts in non-customized, China Unicom, or CMCC format. For more information about log formats, see Network Management and Monitoring Configuration Guide.

Examples

# Set the log format to RFC 5424 for logs sent to log hosts.

<Sysname> system-view

[Sysname] info-center format rfc5424

info-center logbuffer

Use info-center logbuffer to enable log output to the log buffer.

Use undo info-center logbuffer to disable log output to the log buffer.

Syntax

info-center logbuffer

undo info-center logbuffer

Default

Log output to the log buffer is enabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Examples

# Enable log output to the log buffer.

<Sysname> system-view

[Sysname] info-center logbuffer

Related commands

display logbuffer

info-center enable

info-center logbuffer size

Use info-center logbuffer size to set the maximum number of logs that can be buffered.

Use undo info-center logbuffer size to restore the default.

Syntax

info-center logbuffer size buffersize

undo info-center logbuffer size

Default

A maximum of 512 logs can be buffered.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

buffersize: Specifies the maximum log buffer size. The value range is 0 to 1024.

Examples

# Set the maximum log buffer size to 50.

<Sysname> system-view

[Sysname] info-center logbuffer size 50

# Restore the default maximum log buffer size.

<Sysname> system-view

[Sysname] undo info-center logbuffer size

Related commands

display logbuffer

info-center enable

info-center logfile directory

Use info-center logfile directory to specify the directory to save the log file.

Syntax

info-center logfile directory dir-name

Default

The log file directory is flash:/logfile.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

dir-name: Specifies a directory by its name, a string of 1 to 64 characters.

Usage guidelines

The specified log file directory must have been created.

The log file uses the .log extension.

(In standalone mode.) The device uses the default log file directory after a reboot or an active/standby MPU switchover.

(In IRF mode.) The device uses the default log file directory after an IRF reboot or a global active/standby MPU switchover in an IRF fabric.

Examples

# Set the log file directory to flash:/test.

<Sysname> mkdir test

Creating directory flash:/test... Done.

<Sysname> system-view

[Sysname] info-center logfile directory flash:/test

Related commands

info-center logfile enable

Use info-center logfile enable to enable the log file feature.

Use undo info-center logfile enable to disable the log file feature.

Syntax

info-center logfile enable

undo info-center logfile enable

Default

The log file feature is enabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Examples

# Enable log output to the log file.

<Sysname> system-view

[Sysname] info-center logfile enable

info-center logfile frequency

Use info-center logfile frequency to configure the interval at which the system saves logs from the log file buffer to the log file.

Use undo info-center logfile frequency to restore the default.

Syntax

info-center logfile frequency freq-sec

undo info-center logfile frequency

Default

The log file saving interval is 86400 seconds.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

freq-sec: Specifies the log file saving interval in seconds. The value range is 1 to 86400.

Usage guidelines

This command enables the system to automatically save logs in the log file buffer to the log file at the specified interval.

Examples

# Set the log file saving interval to 60000 seconds.

<Sysname> system-view

[Sysname] info-center logfile frequency 60000

Related commands

info-center logfile enable

info-center logfile alarm-threshold

Use info-center logfile alarm-threshold to set the log file usage alarm threshold.

Use undo info-center logfile alarm-threshold to restore the default.

Syntax

info-center logfile alarm-threshold usage

undo info-center logfile alarm-threshold

Default

The log file usage alarm threshold is 80% of the log file size. When the log file usage ratio reaches 80%, the system outputs a message to inform the user.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

usage: Specifies an alarm threshold in percentage in the range of 0 to 100. Setting the alarm threshold to 0 disables the log file usage alarm feature.

Usage guidelines

After you set the log file usage alarm threshold, the system outputs a message to inform the user when the threshold is reached. The user can then back up the log file to avoid loss of log data.

Examples

# Set the log file usage alarm threshold to 90% of the general log file size.

<Sysname> system-view

[Sysname] info-center logfile alarm-threshold 90

info-center logfile overwrite-protection

Use info-center logfile overwrite-protection to enable log file overwrite-protection.

Use undo info-center logfile overwrite-protection to disable log file overwrite-protection.

Syntax

info-center logfile overwrite-protection [ all-port-powerdown ]

undo info-center logfile overwrite-protection

Default

Log file overwrite-protection is disabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

all-port-powerdown: Shuts down all the service ports on the device when no log file space or storage device space is available. If you do not specify this keyword, the device does not shut down service ports when no log file space or storage device space is available.

Usage guidelines

This command is available only in FIPS mode.

Log file overwrite protection enables the system to stop saving new logs when no log file space or storage device space is available.

Examples

# Enable log file overwrite-protection.

<Sysname> system-view

[Sysname] info-center logfile overwrite-protection

info-center logfile size-quota

Use info-center logfile size-quota to set the maximum log file size.

Use undo info-center logfile size-quota to restore the default.

Syntax

info-center logfile size-quota size

undo info-center logfile size-quota

Default

The maximum log file size is 5 MB.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

size: Specifies the maximum log file size in MB.The value range is 1 to 5.

Examples

# Set the maximum log file size to 2 MB.

<Sysname> system-view

[Sysname] info-center logfile size-quota 2

Related commands

info-center logfile enable

info-center logging suppress duplicates

Use info-center logging suppress duplicates to enable duplicate log suppression.

Use undo info-center logging suppress duplicates to disable duplicate log suppression.

Syntax

info-center logging suppress duplicates

undo info-center logging suppress duplicates

Default

Duplicate log suppression is disabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

Outputting consecutive duplicate logs wastes system and network resources and increases device maintenance costs. You can enable this feature to suppress output of consecutive duplicate logs.

Examples

# Enable duplicate log suppression on device A.

<Sysname> system-view

[Sysname] info-center logging suppress duplicates

info-center logging suppress module

Use info-center logging suppress module to configure a log suppression rule for a module.

Use undo info-center logging suppress module to delete a log suppression rule.

Syntax

info-center logging suppress module module-name mnemonic { all | mnemonic-value }

undo info-center logging suppress module module-name mnemonic { all | mnemonic-value }

Default

The device does not suppress output of any logs from any modules.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

module-name: Specifies a log source module by its name, a case-insensitive string of 1 to 8 characters. To view the list of available log source modules, use the info-center logging suppress module ? command.

mnemonic { all | mnemonic-value }: Configures a mnemonic filter for log suppression.

· all: Suppresses output of all logs of the module.

· mnemonic-value: Suppresses output of logs with the specified mnemonic value. The mnemonic-value argument is a case-insensitive string of 1 to 32 characters, which must be the complete value contained in the mnemonic field of the log message. Log suppression will fail if a partial mnemonic value is specified.

Usage guidelines

You can configure log suppression rules to filter out the logs that you are not concerned with. A log suppression rule suppresses output of all logs or only logs with a specific mnemonic value for a module.

Examples

# Configure a log suppression rule to suppress output of logs with the shell_login mnemonic value for the shell module.

<Sysname> system-view

[Sysname] info-center logging suppress module shell mnemonic shell_login

Related commands

info-center source

info-center loghost

Use info-center loghost to specify a log host and to configure output parameters.

Use undo info-center loghost to remove a log host.

Syntax

info-center loghost [ vpn-instance vpn-instance-name ] { hostname | ipv4-address | ipv6 ipv6-address } [ port port-number ] [ dscp dscp-value ] [ facility local-number ] [ filter filter-name ]

undo info-center loghost [ vpn-instance vpn-instance-name ] { hostname | ipv4-address | ipv6 ipv6-address }

Default

No log hosts are specified.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If the log host is on the public network, do not specify this option.

hostname: Specifies a log host by its name, a case-insensitive string of 1 to 253 characters. The host name can contain letters, digits, and special characters including hyphen (-), underscore (_), and dot (.).

ipv4-address: Specifies a log host by its IPv4 address.

ipv6 ipv6-address: Specifies a log host by its IPv6 address.

port port-number: Specifies the port number of the log host, in the range of 1 to 65535. The default is 514. It must be the same as the value configured on the log host. Otherwise, logs cannot be sent to the log host.

dscp dscp-value: Specifies the DSCP value in log packets sent to the log host. The value range for the dscp-value argument is 0 to 63, and the default is 0. The DSCP value of a packet defines the priority of the packet and affects the transmission priority of the packet. A greater DSCP value represents a higher priority.

facility local-number: Specifies a logging facility from local0 to local7 for the log host. The default value is local7. Logging facilities are used to mark different logging sources, and query and filer logs.

filter filter-name: Specifies a log output filter to control log output to the log host. The filter-name argument represents the filter name, a case-insensitive string of 1 to 8 characters. If you do not specify a log output filter, the log output rules configured by using the info-center source command for the log host destination are used.

Usage guidelines

The info-center loghost command takes effect only after the information center is enabled by using info-center enable command.

The device supports a maximum of 20 log hosts.

Examples

# Output logs to the log host at 1.1.1.1.

<Sysname> system-view

[Sysname] info-center loghost 1.1.1.1

Related commands

info-center filter

info-center source

info-center loghost locate-info with-sn

Use info-center loghost locate-info with-sn to add the device serial number to the location field of logs sent to log hosts.

Use undo info-center loghost locate-info with-sn to restore the default.

Syntax

info-center loghost locate-info with-sn

undo info-center loghost locate-info with-sn

Default

The device does not add the device serial number to the location field of logs sent to log hosts.

Views

System view

Predefined user roles

network-admin

mdc-admin

Examples

# Add the device serial number to the location field of logs sent to log hosts.

<Sysname> system-view

[Sysname] info-center loghost locate-info with-sn

info-center loghost source

Use info-center loghost source to specify a source IP address for logs sent to log hosts.

Use undo info-center loghost source to restore the default.

Syntax

info-center loghost source interface-type interface-number

undo info-center loghost source

Default

The source IP address of logs sent to log hosts is the primary IP address of the outgoing interface.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

interface-type interface-number: Specifies an interface by its type and number.

Usage guidelines

The system uses the primary IP address of the specified interface as the source IP address of the logs sent to log hosts.

The info-center loghost source command takes effect only after the information center is enabled by using info-center enable command.

Examples

# Use the IP address of interface Loopback 0 as the source IP address of the logs sent to log hosts.

<Sysname> system-view

[Sysname] interface loopback 0

[Sysname-LoopBack0] ip address 2.2.2.2 32

[Sysname-LoopBack0] quit

[Sysname] info-center loghost source loopback 0

info-center security-logfile alarm-threshold

Use info-center security-logfile alarm-threshold to set the alarm threshold for security log file usage.

Use undo info-center security-logfile alarm-threshold to restore the default.

Syntax

info-center security-logfile alarm-threshold usage

undo info-center security-logfile alarm-threshold

Default

The alarm threshold for security log file usage is 80. When the usage of the security log file reaches 80%, the system outputs a message to inform the administrator.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

usage: Specifies an alarm threshold. The value must be an integer in the range of 1 to 100.

Usage guidelines

When the security log file is full, the system deletes the oldest logs and then writes new logs to the security log file. This feature helps avoid security log loss by setting an alarm threshold for the security log file usage. When the threshold is reached, the system outputs log information to inform the administrator. The administrator can log in to the device with the security-audit user role and back up the security log file.

Examples

# Set the alarm threshold for security log file usage to 90.

<Sysname> system-view

[Sysname] info-center security-logfile alarm-threshold 90

Related commands

info-center security-logfile size-quota

info-center security-logfile directory

Use info-center security-logfile directory to specify the security log file directory.

Syntax

info-center security-logfile directory dir-name

Default

The security log file is saved in the flash:/seclog directory.

Views

System view

Predefined user roles

security-audit

Parameters

dir-name: Specifies a directory by its name, a string of 1 to 64 characters.

Usage guidelines

The specified directory must have been created.

To use this command, a local user must have the security-audit user role. For information about configuring the security-audit user role, see AAA commands in Security Command Reference.

(In standalone mode.) The device uses the default security log file directory after a reboot or an active/standby MPU switchover.

(In IRF mode.) The device uses the default security log file directory after an IRF reboot or a global active/standby MPU switchover in an IRF fabric.

Examples

# Set the security log file directory to flash:/test.

<Sysname> mkdir test

Creating directory flash:/test... Done.

<Sysname> system-view

[Sysname] info-center security-logfile directory flash:/test

info-center security-logfile enable

Use info-center security-logfile enable to enable saving of security logs to the security log file.

Use undo info-center security-logfile enable to restore the default.

Syntax

info-center security-logfile enable

undo info-center security-logfile enable

Default

The saving of security logs to the security log file is disabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This feature enables the system to output security logs to the security log file buffer, and then saves the buffered logs to the security log file regularly.

Examples

# Enable saving security logs to the security log file.

<Sysname> system-view

[Sysname] info-center security-logfile enable

info-center security-logfile frequency

Use info-center security-logfile frequency to configure the interval for saving security logs to the security log file.

Use undo info-center security-logfile frequency to restore the default.

Syntax

info-center security-logfile frequency freq-sec

undo info-center security-logfile frequency

Default

The security log file saving interval is 86400 seconds.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

freq-sec: Specifies the security log file saving interval in seconds. The value range is 10 to 86400 seconds.

Usage guidelines

The system outputs security logs to the security log file buffer, and then saves the buffered logs to the security log file at the specified interval.

Examples

# Set the security log file saving interval to 600 seconds.

<Sysname> system-view

[Sysname] info-center security-logfile frequency 600

Related commands

info-center security-logfile enable

info-center security-logfile size-quota

Use info-center security-logfile size-quota to set the maximum size for the security log file.

Use undo info-center security-logfile size-quota to restore the default.

Syntax

info-center security-logfile size-quota size

undo info-center security-logfile size-quota

Default

The maximum size for the security log file is 10 MB.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

size: Sets the maximum size for the security log file, in MB. The value range is 1 to 10.

Examples

# Set the maximum size to 6 MB for the security log file.

<Sysname> system-view

[Sysname] info-center security-logfile size-quota 6

Related commands

info-center security-logfile alarm-threshold

info-center source

Use info-center source to configure a log output rule for a module.

Use undo info-center source to restore the default.

Syntax

info-center source { module-name | default } { console | logbuffer | logfile | loghost | monitor } { deny | level severity }

undo info-center source { module-name | default } { console | logbuffer | logfile | loghost | monitor }

Default

Table 8 lists the default log output rules.

Table 8 Default output rules

Destination	Log source modules	Output switch	Severity
Console	All supported modules	Enabled	Debugging
Monitor terminal	All supported modules	Disabled	Debugging
Log host	All supported modules	Enabled	Informational
Log buffer	All supported modules	Enabled	Informational
Log file	All supported modules	Enabled	Informational

‌

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

module-name: Specifies a module by its name. You can use the info-center source ? command to view the modules supported by the device.

default: Specifies all supported modules.

console: Outputs logs to the console.

logbuffer: Outputs logs to the log buffer.

logfile: Outputs logs to the log file.

loghost: Outputs logs to the log host.

monitor: Outputs logs to the monitor terminal.

deny: Disables log output.

level severity: Specifies a severity level in the range of 0 to 7. The smaller the severity value, the higher the severity level. See Table 3 for more information. Logs at the specified severity level and higher levels are allowed to be output.

Usage guidelines

If you do not set an output rule for a module, the module uses the output rule set by using the default keyword. If no rule is set by using the default keyword, the module uses the default output rule.

To modify or remove an output rule set for a module, you must use the module-name argument. A new output rule configured by using the default keyword does not take effect on the module.

If you execute this command for a module multiple times, the most recent configuration takes effect.

If you execute this command for the default modules multiple times, the most recent configuration takes effect.

Examples

# Output only VLAN module's information with the emergency level to the console.

<Sysname> system-view

[Sysname] info-center source default console deny

[Sysname] info-center source vlan console level emergency

# Based on the previous configuration, disable output of VLAN module's information to the console so no system information is output to the console.

<Sysname> system-view

[Sysname] undo info-center source vlan console

info-center synchronous

Use info-center synchronous to enable synchronous information output.

Use undo info-center synchronous to disable synchronous information output.

Syntax

info-center synchronous

undo info-center synchronous

Default

Synchronous information output is disabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

System log output interrupts ongoing configuration operations, including obscuring previously entered commands. Synchronous information output shows the obscured commands. It also provides a command prompt in command editing mode, or a [Y/N] string in interaction mode so you can continue your operation from where you were stopped.

Examples

# Enable synchronous information output, and then execute the display current-configuration command to view the current configuration of the device.

<Sysname> system-view

[Sysname] info-center synchronous

Info-center synchronous output is on

[Sysname] display current-

At this time, the system receives log information. It displays the log information first, and then displays your previous input, which is display current- in this example.

%May 21 14:33:19:425 2019 Sysname SHELL/5/SHELL_LOGIN: VTY logged in from 192.168.1.44

[Sysname] display current-

Enter configuration to complete the display current-configuration command, and press the Enter key to execute the command.

# Enable synchronous information output, and then save the current configuration (enter interactive information).

<Sysname> system-view

[Sysname] info-center synchronous

Info-center synchronous output is on

[Sysname] save

The current configuration will be written to the device. Are you sure? [Y/N]:

At this time, the system receives the log information. It displays the log information first and then displays [Y/N].

%May 21 14:33:19:425 2019 Sysname SHELL/5/SHELL_LOGIN: VTY logged in from 192.168.1.44

[Y/N]:

Enter Y or N to complete your input.

info-center syslog min-age

Use info-center syslog min-age to set the minimum storage period.

Use undo info-center syslog min-age to restore the default.

Syntax

info-center syslog min-age min-age

undo info-center syslog min-age

Default

The minimum storage period is not set.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

min-age: Sets the minimum storage period in hours. The value range is 1 to 8760.

Examples

# Set the minimum storage period to 168 hours.

<Sysname> system-view

[Sysname] info-center syslog min-age 168

info-center syslog trap buffersize

Use info-center syslog trap buffersize to set the maximum number of log traps that can be stored in the log trap buffer.

Use undo info-center syslog trap buffersize to restore the default.

Syntax

info-center syslog trap buffersize buffersize

undo info-center syslog trap buffersize

Default

The log trap buffer can store a maximum of 1024 traps.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

buffersize: Specifies the maximum number of log traps that can be stored in the log trap buffer. The value range is 0 to 65535. Value 0 indicates that the device does not buffer log traps.

Usage guidelines

Log traps are SNMP notifications stored in the log trap buffer. After the snmp-agent trap enable syslog command is configured, the device sends log messages in SNMP notifications to the log trap buffer. You can view the log traps by accessing the MIB corresponding to the trap buffer.

The default buffer size is usually used. You can adjust the buffer size according to your network condition. New traps overwrite the oldest traps when the log trap buffer is full.

Examples

# Set the log trap buffer size to 2048.

<Sysname> system-view

[Sysname] info-center syslog trap buffersize 2048

Related commands

snmp-agent trap enable syslog

info-center timestamp

Use info-center timestamp to set the timestamp format for logs sent to the console, monitor terminal, log buffer, and log file.

Use undo info-center timestamp to restore the default.

Syntax

info-center timestamp { boot | date | none }

undo info-center timestamp

Default

The timestamp format for logs sent to the console, monitor terminal, log buffer, and log file is date.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

boot: Sets the timestamp format to xxx.yyy, where xxx is the most significant 32 bits (in milliseconds) and yyy is the least significant 32 bits. For example, 0.21990989 equals Jun 25 14:09:26:881 2019. The boot time shows the time since system startup.

date: Sets the timestamp format to MMM DD hh:mm:ss:ms YYYY, such as Dec 8 10:12:21:708 2019. The date time shows the current system time.

· MMM: Abbreviations of the months in English, which could be Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, or Dec.

· DD: Date, starting with a space if it is less than 10, for example " 7".

· hh:mm:ss:ms: Local time, with hh in the range of 00 to 23, mm and ss in the range of 00 to 59, and ms in the range of 0 to 999.

· YYYY: Year.

none: Indicates no time information is provided.

Examples

# Set the timestamp format to boot for logs sent to the console, monitor terminal, log buffer, and log file.

<Sysname> system-view

[Sysname] info-center timestamp boot

Related commands

info-center timestamp loghost

Use info-center timestamp loghost to set the timestamp format for logs sent to log hosts.

Use undo info-center timestamp loghost to restore the default.

Syntax

info-center timestamp loghost { date [ with-milliseconds ] | iso [ with-milliseconds | with-timezone ] * | no-year-date | none }

undo info-center timestamp loghost

Default

The timestamp format for logs sent to log hosts is date.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

date: Sets the timestamp format to MMM DD hh:mm:ss YYYY, such as Dec 8 10:12:21 2019. The date time shows the current system time.

iso: Sets the ISO 8601 timestamp format, for example, 2019-09-21T15:32:55.

with-milliseconds: Sets the timestamp to be accurate to milliseconds for logs output to log hosts in date or ISO 8601 format. The millisecond value is appended to the time information in the timestamp with a dot as the separator. If you do not specify this keyword, the timestamp in date or ISO 8601 format is accurate to seconds.

· Example of a timestamp in date format with millisecond accuracy: Dec 8 10:12:21.708 2019.

· Example of a timestamp in ISO 8601 format with millisecond accuracy: 2019-09-21T15:32:55.708.

with-timezone: Includes the time zone information in the ISO format timestamp. For example, 2019-09-21T15:32:55+01:00. By default, the ISO format timestamp does not contain the time zone information.

no-year-date: Sets the timestamp format to the current system date and time without year or millisecond information.

none: Indicates that no timestamp information is provided.

Examples

# Set the timestamp format to no-year-date for logs sent to log hosts.

<Sysname> system-view

[Sysname] info-center timestamp loghost no-year-date

Related commands

info-center timestamp

info-center trace-logfile quota

Use info-center trace-logfile quota to set the maximum size for the trace log file.

Use undo info-center trace-logfile quota to restore the default.

Syntax

info-center trace-logfile quota size

undo info-center trace-logfile quota

Default

The maximum size for the trace log file is 10 MB.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

size: Sets the maximum size for the trace log file, in MB. The value range is 1 to 10.

Examples

# Set the maximum size to 6 MB for the trace log file.

<Sysname> system-view

[Sysname] info-center trace-logfile quota 6

logfile save

Use logfile save to manually save logs in the log file buffer to the log file.

Syntax

logfile save

Views

Any view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

You can specify the directory to save the log file by using the info-center logfile directory command.

The system clears the log file buffer after saving the buffered logs to the log file automatically or manually.

If the log file buffer is empty, this command displays a success message event though no logs are saved to the log file.

Examples

# Manually save logs from the log file buffer to the log file.

<Sysname> logfile save

The contents in the log file buffer have been saved to the file flash:/logfile/logfile.log.

Related commands

info-center logfile enable

info-center logfile directory

reset logbuffer

Use reset logbuffer to clear the log buffer.

Syntax

reset logbuffer

Views

User view

Predefined user roles

network-admin

mdc-admin

Examples

# Clear the log buffer.

<Sysname> reset logbuffer

Related commands

display logbuffer

security-logfile save

Use security-logfile save to manually save security logs from the security log file buffer to the security log file.

Syntax

security-logfile save

Views

Any view

Predefined user roles

security-audit

Usage guidelines

The system clears the security log file buffer after saving the buffered security logs to the security log file automatically or manually.

If the security log file buffer is empty, this command displays a success message event though no security logs are saved to the security log file.

To use this command, a local user must have the security-audit user role. For information about configuring the security-audit user role, see AAA commands in Security Command Reference.

Examples

# Manually save the security logs in the security log file buffer to the security log file.

<Sysname> security-logfile save

The contents in the security log file buffer have been saved to the file flash:/seclog/seclog.log.

Related commands

info-center security-logfile directory

authorization-attribute (Security Command Reference)

snmp-agent trap enable syslog

Use snmp-agent trap enable syslog to enable SNMP notifications for log messages.

Use undo snmp-agent trap enable syslog to disable SNMP notifications for log messages.

Syntax

snmp-agent trap enable syslog

undo snmp-agent trap enable syslog

Default

The device does not send SNMP notifications for log messages.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command enables the device to send an SNMP notification for each log message it outputs. The device encapsulates logs in SNMP notifications and then sends them to the SNMP module and the log trap buffer.

For the SNMP module to send the received SNMP notifications correctly, you must also configure SNMP on the device. For more information about SNMP configuration, see the network management and monitoring configuration guide for the device.

To view the traps in the log trap buffer, access the MIB corresponding to the log trap buffer. The log trap buffer size can be set by using the info-center syslog trap buffersize command.

Examples

# Enable the device to send SNMP notifications for log messages.

<Sysname> system-view

[Sysname] snmp-agent trap enable syslog

Related commands

info-center syslog trap buffersize

terminal debugging

Use terminal debugging to enable output of debugging messages (debugging-level log messages) to the current terminal.

Use undo terminal debugging to disable output of debugging messages to the current terminal.

Syntax

terminal debugging

undo terminal debugging

Default

Output of debugging messages to the current terminal is disabled.

Views

User view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

To enable output of debugging messages to the console, perform the following tasks:

1. Execute the terminal debugging command.

2. Enable the information center. The information center is enabled by default.

3. Use a debugging command to enable the related debugging.

To enable output of debugging messages to the monitor terminal, perform the following tasks:

1. Execute the terminal monitor and terminal debugging commands.

2. Enable the information center. The information center is enabled by default.

3. Use a debugging command to enable the related debugging.

This command takes effect only for the current connection between the terminal and the device. If a new connection is established, the default is restored.

You can also enable output of debugging messages to the current terminal by executing the terminal logging level 7 command. The terminal logging level 7 command and the terminal debugging command have the following differences:

· The terminal logging level 7 command enables log output for all log severity levels (levels 0 through 7).

· The terminal debugging command enables log output for the following log severity levels:

¡ Debugging level (level 7).

¡ Severity level higher than or equal to the level specified in the terminal logging level command.

Examples

# Enable output of debugging messages to the current terminal.

<Sysname> terminal debugging

The current terminal is enabled to display debugging logs.

Related commands

terminal logging level

terminal monitor

terminal logging level

Use terminal logging level to set the lowest level of logs that can be output to the current terminal.

Use undo terminal logging level to restore the default.

Syntax

terminal logging level severity

undo terminal logging level

Default

The lowest level of logs that can be output to the current terminal is 6 (Informational).

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

severity: Specifies a log severity level. Valid values are alert, critical, debugging, emergency, error, informational, notification, warning, and digits from 0 to 7.

Usage guidelines

This command enables the device to output logs with a severity level higher than or equal to the specified level to the current terminal. For example, if you set the severity argument to 6, logs with a severity value from 0 to 6 are output to the current terminal.

This command takes effect only for the current connection between the terminal and the device. If a new connection is established, the default is restored.

Examples

# Configure the device to output logs with the debugging level and higher levels to the current terminal.

<Sysname> terminal logging level 7

terminal monitor

Use terminal monitor to enable log output to the current terminal.

Use undo terminal monitor to disable log output to the current terminal.

Syntax

terminal monitor

undo terminal monitor

Default

Log output to the console is enabled, and log output to the monitor terminal is disabled.

Views

User view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command takes effect only for the current connection between the terminal and the device. If a new connection is established, the default is restored.

Examples

# Enable log output to the current terminal.

<Sysname> terminal monitor

The current terminal is enabled to display logs.

13-Network Management and Monitoring Command Reference

Information center commands

display logfile summary

enable log updown

info-center logfile overwrite-protection

info-center timestamp

info-center trace-logfile quota

terminal logging level

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