Network synchronization commands -- display network-clock self-test-result

Use display network-clock self-test-result to display the self-test result of the network clock monitoring module.

Syntax

Distributed devices in standalone mode:

display network-clock self-test-result

Distributed devices in IRF mode:

display network-clock self-test-result [ chassis chassis-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. If you do not specify a member device, this command displays the test result for all member devices. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. On an IRF fabric, this command displays the test result for all member devices if you do not specify a member device. On an IRF 3 system, this command displays the test result for all IRF member devices and PEXs if you do not specify a member device or PEX. (Distributed devices in IRF mode.) (IRF 3 capable.)

Examples

# Display the self-test result of the network clock monitoring module.

<Sysname> display network-clock self-test-result

Clock module work mode: Normal

SRAM : Normal

CPLD : Normal

E1A : Normal

E1B : Normal

Table 1 Command output

Field | Description
Clock module work mode | State of the clock chip: · Normal—The clock chip is operating correctly. · Fault—The clock chip is not operating correctly. The clock chip changes to this state when its SRAM, CPLD, E1A, or E1B has failed.
SRAM | State of the SRAM: · Normal—The SRAM is operating correctly. · Fault—The SRAM has failed.
CPLD | State of the CPLD: · Normal—The CPLD is operating correctly. · Fault—The CPLD has failed.
E1A | State of the network clock chip E1A: · Normal—The E1A is operating correctly. · Fault—The E1A has failed.
E1B | State of the network clock chip E1B: · Normal—The E1B is operating correctly. · Fault—The E1B has failed.

‌

Network synchronization commands -- display network-clock source

Use display network-clock source to display the states of clock sources.

Syntax

Distributed devices in standalone mode:

display network-clock source

Distributed devices in IRF mode:

display network-clock source [ chassis chassis-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. If you do not specify a member device, this command displays the states of clock sources on all IRF member devices. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. On an IRF fabric, this command displays the states of clock sources on all member devices if you do not specify a member device. On an IRF 3 system, this command displays the states of clock sources on all IRF member devices and PEXs if you do not specify a member device or PEX. (Distributed devices in IRF mode.) (IRF 3 capable.)

Usage guidelines

This command displays the states of clock sources only for the current MDC.

To display BITS clock sources, execute this command on any MDC.

To display information about a line clock source, you must execute this command on the MDC that contains the line clock input port. This command does not display the line clock source if all settings of the clock source are default.

Examples

# Display the states of clock sources.

<Sysname> display network-clock source

Traced reference: Pos3/1/1

BITS State Priority SSM level Force SSM Sa bit Direction Frequency

BITS0 Lost 255 Unknown ON 4 In 2 Mbps

BITS1 Lost 255 Unknown ON 4 Out 2 MHz

PTP N/A 1 Unknown ON N/A N/A N/A

Port State Priority SSM level Force SSM LPU port

Pos3/1/1 Normal 10 Unknown OFF Yes

Cpos4/1/9 Normal 15 Unknown ON No

Table 2 Command output

Field | Description
Traced reference | Traced clock source. If a clock source is traced, the network clock monitoring module distributes its timing signal to all interface cards. If no clock source has been traced, this field displays N/A.
BITS | BITS clock: · BITS0. · BITS1.
State | State of the clock source: · Normal—The clock source is operating correctly. · Lost—The clock source is not available or is in an error condition. · N/A—PTP is used for time synchronization.
Priority | Priority of the clock source.
SSM level | Clock source quality level in the SSM, by descending order of quality: · PRC—G.811 primary reference clock. · SSU-A—G.812 primary-level SSU. · SSU-B—G.812 second-level SSU. · SEC—SDH equipment clock. · DNU—Do not use for synchronization. · Unknown—Unknown quality level.
Force SSM | Method for setting the quality of the clock source: · ON—Sets the clock source's quality level to the user-assigned SSM value. · OFF—Extracts the SSM quality level from the timing signal sent by the clock source.
Sa bit | Sa bit used by BITS to transmit the SSM: · sa4—Bit Sa4. · sa5—Bit Sa5. · sa6—Bit Sa6. · sa7—Bit Sa7. · sa8—Bit Sa8. This field displays N/A for line clock sources, because line clocks do not support the Sa bit configuration.
Direction | Direction of the BITS clock: · In—Derives timing from an external clock reference. · Out—Provides timing to external devices.
Frequency | Frequency of the BITS clock: · 2 Mbps. · 2 MHz.
Port | Line clock input port.
LPU port | Line clock input role of the port: · Yes—The port has been specified as a line clock input port. · No—The port is not specified as a line clock input port. This field displays N/A for BITS 0, BITS 1, and PTP.

‌

Network synchronization commands -- display network-clock status

Use display network-clock status to display the operating state of the network clock monitoring module.

Syntax

Distributed devices in standalone mode:

display network-clock status

Distributed devices in IRF mode:

display network-clock status [ chassis chassis-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. If you do not specify a member device, this command displays information for all IRF member devices. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. On an IRF fabric, this command displays information for all member devices if you do not specify a member device. On an IRF 3 system, this command displays information for all IRF member devices and PEXs if you do not specify a member device or PEX. (Distributed devices in IRF mode.) (IRF 3 capable.)

Examples

# Display the operating state of the network clock monitoring module.

<Sysname> display network-clock status

Mode : Auto

Traced reference : N/A

Lock mode : Unknown

SSM output level : SSUB

SSM control enable: On

Table 3 Command output

Field | Description
Mode | Clock reference selection mode: · Auto—Automatic reference selection. · Manual—Manual reference selection.
Traced reference | Clock reference that has been selected and traced. This field displays N/A if no clock reference has been selected.
Lock mode | Phase lock state of the clock monitoring module: · Freerun—Freerun mode. · Locked—Locked (traced) mode. · Holdover—Holdover state. · Pre-locked—Pre-locked mode. · Lost—The clock signal has been lost. · Unknown—No timing signal is available. The network clock monitoring module is in an exceptional condition.
SSM output level | Signal quality level of the clock source in the SSM, by descending order of quality: · PRC—G.811 primary reference clock. · SSU-A—G.812 primary-level SSU. · SSU-B—G.812 second-level SSU. · SEC—SDH equipment clock. · DNU—Do not use for synchronization. · Unknown—Unknown quality level.
SSM control enable | Contribution of SSM to automatic reference selection: · On—SSM is used in the selection process. · Off—SSM is not used in the selection process.

‌

Network synchronization commands -- display network-clock version

Use display network-clock version to display the version of the network clock monitoring module.

Syntax

Distributed devices in standalone mode:

display network-clock version

Distributed devices in IRF mode:

display network-clock version [ chassis chassis-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. If you do not specify a member device, this command displays information for all IRF member devices. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. On an IRF fabric, this command displays information for all member devices if you do not specify a member device. On an IRF 3 system, this command displays information for all IRF member devices and PEXs if you do not specify a member device or PEX. (Distributed devices in IRF mode.) (IRF 3 capable.)

Examples

# Display version information for the network clock monitoring module.

<Sysname> display network-clock version

Clock card

Type : SR01CK3A

Software : 106

PCB : A

Number of Cpld: 1

Cpld 0:

Software : 001

Table 4 Command output

Field | Description
Type | Model of the clock daughter card. Available models are SR01CK3A and SR07CK3C.
Software | Software version of the network clock monitoring module.
PCB | PCB version of the clock daughter card.
Number of Cpld | Number of CPLDs on the clock daughter card.
Cpld 0 | The first CPLD on the clock daughter card.
Software | Software version of CPLD 0.

‌

Network synchronization commands -- network-clock lpuport

Use network-clock lpuport to specify a line clock input port.

Use undo network-clock lpuport to remove a line clock input port.

Syntax

network-clock lpuport interface-type interface-number

undo network-clock lpuport interface-type interface-number

Default

No ports are specified as line clock input ports.

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

Only main physical interfaces can act as clock input ports.

When you specify a main interface as a clock input port, you must set its clock mode to slave. The network clock monitoring module extracts clock signal from an interface only when the interface is operating in slave mode.

You can specify multiple clock input ports.

· In automatic reference selection mode, the module includes only the highest-priority clock input port in the selection process.

· In manual reference selection mode, the module includes only the clock input port specified by using the network-clock work-mode manual mdc command as the reference.

Examples

# Specify POS 2/2/0 as a line clock input port.

<Sysname> system-view

[Sysname] network-clock lpuport pos 2/2/0

Related commands

display network-clock source

network-clock work-mode manual mdc

Network synchronization commands -- network-clock source direction

Use network-clock source direction to specify the timing direction of a BITS clock.

Use undo network-clock source direction to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock source { bits0 | bits1 } direction { in | out }

undo network-clock source { bits0 | bits1 } direction

Distributed devices in IRF mode:

network-clock chassis chassis-number source { bits0 | bits1 } { in | out }

undo network-clock chassis chassis-number source { bits0 | bits1 } direction

Default

The default for this command varies by device model.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

bits0: Specifies the BITS 0 clock.

bits1: Specifies the BITS 1 clock.

in: Enables the BITS clock to derive its timing from an external clock reference.

out: Enables the BITS clock to provide timing for external devices.

Usage guidelines

This command is configurable only on the default MDC. However, the command setting takes effect on all MDCs.

Examples

# Specify the outbound timing direction for BITS 0.

<Sysname> system-view

[Sysname] network-clock source bits0 direction out

Related commands

display network-clock source

Network synchronization commands -- network-clock source forcessm

Use network-clock source forcessm to configure the method for setting the quality level of a clock source.

Use undo network-clock source forcessm to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock source { bits0 | bits1 | lpuport interface-type interface-number | ptp } forcessm { off | on }

undo network-clock source { bits0 | bits1 | lpuport interface-type interface-number | ptp } forcessm

Distributed devices in IRF mode:

network-clock chassis chassis-number source { bits0 | bits1 | ptp } forcessm { off | on }

network-clock source lpuport interface-type interface-number forcessm { off | on }

undo network-clock chassis chassis-number source { bits0 | bits1 | ptp } forcessm

undo network-clock source lpuport interface-type interface-number forcessm

Default

The network clock monitoring module sets the quality level of a clock source to the user-assigned value. It does not extract the quality level from the SSM sent by the clock source.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

bits0: Specifies the BITS 0 clock.

bits1: Specifies the BITS 1 clock.

lpuport interface-type interface-number: Specifies a line clock. The interface-type interface-number arguments specify the type and number of the line clock input port.

ptp: Specifies the Precision Timing Protocol (PTP).

off: Sets the quality level of a clock source to the value extracted from the SSM sent by the clock source.

on: Sets the quality level of a clock source to the user-assigned value.

Usage guidelines

For BITS and PTP, this command is configurable only on the default MDC. For a line clock, this command is configurable only on the MDC that contains the line clock input port.

Examples

# Set the quality level of BITS 0 to the value extracted from the SSM sent by the clock source.

<Sysname> system-view

[Sysname] network-clock source bits0 forcessm off

Related commands

display network-clock source

Network synchronization commands -- network-clock source frequency

Use network-clock source frequency to set the frequency of a BITS clock.

Use undo network-clock source frequency to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock source { bits0 | bits1 } frequency { bps-2m | hz-2m }

undo network-clock source { bits0 | bits1 } frequency

Distributed devices in IRF mode:

network-clock chassis chassis-number source { bits0 | bits1 } frequency { bps-2m | hz-2m }

undo network-clock chassis chassis-number source { bits0 | bits1 } frequency

Default

The default for this command varies by device model.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

bits0: Specifies the BITS 0 clock.

bits1: Specifies the BITS 1 clock.

bps-2m: Sets the frequency to 2 Mbps.

hz-2m: Sets the frequency to 2 MHz.

Usage guidelines

This command is configurable only on the default MDC. However, the command setting takes effect on all MDCs.

Examples

# Set the frequency to 2 MHz for BITS 0.

<Sysname> system-view

[Sysname] network-clock source bits0 frequency hz-2m

Related commands

display network-clock source

Network synchronization commands -- network-clock source priority

Use network-clock source priority to set the priority of a clock source.

Use undo network-clock source priority to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock source { bits0 | bits1 | lpuport interface-type interface-number | ptp } priority priority

undo network-clock source { bits0 | bits1 | lpuport interface-type interface-number | ptp } priority

Distributed devices in IRF mode:

network-clock chassis chassis-number source { bits0 | bits1 | ptp } priority priority

network-clock source lpuport interface-type interface-number priority priority

undo network-clock chassis chassis-number source { bits0 | bits1 | ptp } priority

undo network-clock source lpuport interface-type interface-number priority

Default

All clock sources have a priority of 255.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

bits0: Specifies the BITS 0 clock.

bits1: Specifies the BITS 1 clock.

lpuport interface-type interface-number: Specifies a line clock. The interface-type interface-number arguments specify the type and number of the line clock input port.

ptp: Specifies PTP.

priority priority: Sets a priority value in the range of 1 to 255. The lower the value, the higher quality the timing signal.

Usage guidelines

For BITS and PTP, this command is configurable only on the default MDC. For a line clock, this command is configurable only on the MDC that contains the line clock input port.

Examples

# Assign a priority of 3 to BITS 0.

<Sysname> system-view

[Sysname] network-clock source bits0 priority 3

Related commands

display network-clock source

Network synchronization commands -- network-clock source sa-bit

Use network-clock source sa-bit to set the Sa bit used to transmit the SSM for a BITS clock.

Use undo network-clock source sa-bit to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock source { bits0 | bits1 } sa-bit { sa4 | sa5 | sa6 | sa7 | sa8 }

undo network-clock source { bits0 | bits1 } sa-bit

Distributed devices in IRF mode:

network-clock chassis chassis-number source { bits0 | bits1 } sa-bit { sa4 | sa5 | sa6 | sa7 | sa8 }

undo network-clock chassis chassis-number source { bits0 | bits1 } sa-bit

Default

BITS clocks use Sa4 to transmit the SSM.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

bits0: Specifies the BITS 0 clock.

bits1: Specifies the BITS 1 clock.

sa-bit: Specifies an Sa bit.

· sa4—Specifies bit Sa4.

· sa5—Specifies bit Sa5.

· sa6—Specifies bit Sa6.

· sa7—Specifies bit Sa7.

· sa8—Specifies bit Sa8.

Usage guidelines

This command is configurable only on the default MDC. However, the command setting takes effect on all MDCs.

Examples

# Specify Sa5 as the SSM bit for BITS 0.

<Sysname> system-view

[Sysname] network-clock source bits0 sa-bit sa5

Network synchronization commands -- network-clock source ssm

Use network-clock source ssm to assign an SSM quality level to a clock source.

Use undo network-clock source ssm to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock source { bits0 | bits1 | lpuport interface-type interface-number | ptp } ssm { dnu | prc | sec | ssua | ssub | unknown }

undo network-clock source { bits0 | bits1 | lpuport interface-type interface-number | ptp } ssm

Distributed devices in IRF mode:

network-clock chassis chassis-number source { bits0 | bits1 | ptp } ssm { dnu | prc | sec | ssua | ssub | unknown }

network-clock source lpuport interface-type interface-number ssm { dnu | prc | sec | ssua | ssub | unknown }

undo network-clock chassis chassis-numb er source { bits0 | bits1 | ptp } ssm

undo network-clock source lpuport interface-type interface-number ssm

Default

The SSM quality level is unknown for all clock sources.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

bits0: Specifies the BITS 0 clock.

bits1: Specifies the BITS 1 clock.

lpuport interface-type interface-number: Specifies a line clock. The interface-type interface-number arguments specify the type and number of the line clock input port.

ptp: Specifies the PTP.

dnu: Sets the SSM quality level to DNU SSM quality level. DNU clock sources cannot participate in automatic clock reference selection.

prc: Sets the SSM quality level to G.811 primary reference clock.

sec: Sets the SSM quality level to SDH equipment clock.

ssua: Sets the SSM quality level to G.812 primary-level SSU.

ssub: Sets the SSM quality level to G.812 second-level SSU.

unknown: Sets the SSM quality level to unknown.

Usage guidelines

For BITS and PTP, this command is configurable only on the default MDC. For a line clock, this command is configurable only on the MDC that contains the line clock input port.

For the manually assigned SSM quality level to take effect, you must configure the network-clock source forcessm on command.

It takes time for an SSM quality level change to take effect. To verify the effectiveness of the change, use the display network-clock source command or check the log.

Examples

# Set the SSM quality level of BITS 0 to DNU.

<Sysname> system-view

[Sysname] network-clock source bits0 ssm dnu

Network synchronization commands -- network-clock ssmcontrol

Use network-clock ssmcontrol to control the use of SSM quality level in the automatic reference selection process.

Use undo network-clock ssmcontrol to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock ssmcontrol { off | on }

undo network-clock ssmcontrol

Distributed devices in IRF mode:

network-clock chassis chassis-number ssmcontrol { off | on }

undo network-clock chassis chassis-number ssmcontrol

Default

The SSM quality level is ignored in the automatic reference selection process.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

off: Ignores the SSM quality level in clock reference selection.

on: Includes the SSM quality level as a factor for clock reference selection.

Usage guidelines

This command takes effect for automatic clock reference selection.

This command is configurable only on the default MDC. However, the command setting takes effect on all MDCs.

Examples

# Include the SSM quality level into the automatic clock reference selection process.

<Sysname> system-view

[Sysname] network-clock ssmcontrol on

Related commands

display network-clock source

network-clock ssm

Network synchronization commands -- network-clock work-mode

Use network-clock work-mode to set the clock reference selection mode.

Use undo network-clock work-mode to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock work-mode { auto | manual source { bits0 | bits1 | lpuport interface-type interface-number } }

undo network-clock work-mode

Distributed devices in IRF mode:

network-clock chassis chassis-number work-mode { auto | manual source { bits0 | bits1 } }

network-clock work-mode manual source lpuport interface-type interface-number

undo network-clock chassis chassis-number work-mode

Default

Automatic reference selection mode applies.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

auto: Enables automatic reference selection.

manual source: Enables manual reference selection.

bits0: Specifies BITS 0 as the reference.

bits1: Specifies BITS 1 as the reference.

lpuport interface-type interface-number: Specifies a line clock input port as the reference. The interface-type interface-number arguments specify an interface by its type and number.

Usage guidelines

To specify a line clock input port, use the network-clock work-mode command on the MDC that contains the port. If the MDC is not the default MDC, you must also configure the network-clock work-mode manual mdc command on the default MDC.

To use the timing signal from an interface as the synchronization reference, you must also specify the interface as a line clock input port by using the network-clock lpuport command.

It takes time for a clock reference selection mode change to take effect. To verify the effectiveness of the change, use the display network-clock status command or check the log.

Examples

# Specify BITS 0 as the clock reference.

<Sysname> system-view

[Sysname] network-clock work-mode manual source bits0

# Enable automatic reference selection.

<Sysname> system-view

[Sysname] network-clock work-mode auto

Related commands

display network-clock source

display network-clock status

network-clock lpuport

Network synchronization commands -- network-clock work-mode manual mdc

Use network-clock work-mode manual mdc to specify the manually specified clock reference on an MDC as the primary clock reference for the entire system.

Use undo network-clock work-mode manual mdc to restore the default.

Syntax

Distributed devices in standalone mode:

network-clock work-mode manual mdc mdc-id

undo network-clock work-mode manual mdc

Distributed devices in IRF mode:

network-clock chassis chassis-number work-mode manual mdc mdc-id

undo network-clock chassis chassis-number work-mode manual mdc

Default

The clock reference manually specified on the default MDC takes effect on the entire system.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

mdc mdc-id: Specifies the ID of a non-default MDC on which you have manually specified a clock reference. The value range for the MDC ID varies by device model.

chassis chassis-number: Specifies an IRF member device by its member ID. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual chassis number. (Distributed devices in IRF mode.) (IRF 3 capable.)

Usage guidelines

This command is configurable only on the default MDC. The command setting takes effect on all MDCs.

Before you can specify a non-default MDC to provide the primary synchronization reference, use the display network-clock source command to verify that the MDC has a clock source in Normal state. If the MDC does not have a correctly operating clock source, it cannot be configured to provide timing for other MDCs.

Examples

# Use the clock reference manually specified on MDC 2 to provide timing for the entire system.

<Sysname> system-view

[Sysname] network-clock work-mode manual mdc 2

Related commands

display network-clock status

network-clock work-mode

Synchronous Ethernet commands -- display esmc

Use display esmc to display ESMC information.

Syntax

display esmc [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, the command displays ESMC information for all interfaces.

Usage guidelines

ESMC information is not available for interfaces in asynchronous mode.

Examples

# Display ESMC information for all interfaces.

<Sysname> display esmc

Interface : GigabitEthernet1/0/1

Mode : Synchronous

ESMC status : Enable

Port status : Up

Duplex mode : Full

QL received : QL-SEC

QL sent : QL-PRC

ESMC information packets received : 2195

ESMC information packets sent : 6034

ESMC event packets received : 1

ESMC event packets sent : 16

ESMC information rate : 1 packets/sec

ESMC expiration : 5 seconds

Table 5 Command output

Field | Description
Interface | Interface that receives ESMC information.
Mode | Ethernet interface mode: · Synchronous—Synchronous mode. Non-Synchronous—Asynchronous mode.
ESMC status | Whether ESMC is enabled: · Enable—ESMC is enabled. · Disable—ESMC is disabled.
QL received QL sent | Quality level in the ESMC packet most recently received or sent on the interface: · PRC—G.811 primary reference clock. · SSU-A—G.812 primary-level SSU. · SSU-B—G.812 second-level SSU. · SEC—SDH equipment clock. · DNU—Do not use for synchronization. · UNK—Unknown quality level.
ESMC information packets received ESMC information packets sent | Number of received or sent ESMC information packets.
ESMC event packets received ESMC event packets sent | Number of received or sent ESMC event packets.
ESMC information rate | Transmission rate of ESMC information packets. The value is fixed at 1 pps.
ESMC expiration | ESMC expiration timer. The timer is fixed at 5 seconds.

‌

Related commands

esmc enable

synchronous mode

Synchronous Ethernet commands -- esmc enable

Use esmc enable to enable the Ethernet synchronization messaging channel (ESMC) on an Ethernet interface.

Use undo esmc enable to disable the Ethernet synchronization messaging channel (ESMC) on an Ethernet interface.

Syntax

esmc enable

undo esmc enable

Default

ESMC is disabled on Ethernet interfaces.

Views

Layer 2 Ethernet interface view

Layer 3 Ethernet interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

Before you can enable ESMC, you must configure the interface to operate in synchronous mode.

Examples

# Enable ESMC on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] esmc enable

Related commands

display esmc

synchronous mode

Synchronous Ethernet commands -- synce state

Use synce state to set the clock mode on a copper GE port.

Use undo synce state to restore the default.

Syntax

synce state { master | slave }

undo synce state

Default

The clock mode of a GE copper port is automatically negotiated.

Views

Layer 2 Ethernet interface view

Layer 3 Ethernet interface view

Predefined user roles

network-admin

mdc-admin

Parameters

master: Specifies the master clock mode.

slave: Specifies the slave clock mode.

Usage guidelines

To avoid a negotiation result that conflicts with your clock synchronization trail design, manually set the clock mode.

· To derive timing from the upstream clock, set the clock mode to slave.

· To provide timing for the downstream clock, set the clock mode to master.

Examples

# Configure GigabitEthernet 1/0/1 to operate in master mode.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] synce state master

Synchronous Ethernet commands -- synchronous mode

Use synchronous mode to enable the synchronous mode on an Ethernet interface.

Use undo synchronous mode to restore the default.

Syntax

synchronous mode

undo synchronous mode

Default

Ethernet interfaces are regular Ethernet interfaces in non-synchronous mode. They do not extract timing signals, send, forward, or process ESMC packets.

Views

Layer 2 Ethernet interface view

Layer 3 Ethernet interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

You can configure an interface as a line clock input port only after you enable the synchronous mode on the interface.

Examples

# Enable the synchronous mode on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] synchronous mode

Related commands

display esmc

esmc enable