Contents

Network synchronization commands· 1

display network-clock self-test-result 1

display network-clock source· 2

display network-clock status· 3

display network-clock version· 5

network-clock source forcessm·· 5

network-clock source frequency· 6

network-clock source priority· 7

network-clock source sa-bit 8

network-clock source ssm·· 9

network-clock ssmcontrol 10

network-clock work-mode· 11

Synchronous Ethernet commands· 13

display esmc· 13

esmc enable· 14

synchronous mode· 15

Network synchronization commands

Related commands

network-clock freq-deviation-detect enable

network-clock freq-deviation-threshold

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

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 a cluster member device by its member ID. If you do not specify a member device, this command displays the test result on all member devices.

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.

 

display network-clock source

Use display network-clock source to display information about the clock sources.

Syntax

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 a cluster member device by its member ID. If you do not specify a member device, this command displays information about the clock sources on all cluster member devices.

Examples

# Display information about the clock sources.

<Sysname> display network-clock source

Traced reference: GE1/2/0/1

Reference   State   Priority  SSM level Force SSM Sa-Bit  LPU port  Frequency

BITS0       Lost    255       Unknown   ON        4       N/A       2 Mbps

BITS1       Lost    255       Unknown   ON        4       N/A       2 Mbps

PTP         N/A     255       Unknown   ON        N/A     N/A       N/A

GE1/2/0/1   Normal  10        Unknown   OFF       N/A     Yes       N/A

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.
Reference	Clock source: ·     BITS0. ·     BITS1. ·     PTP. ·     Line clock. The value is the line clock input port. This information is displayed only when a line clock input port is configured.
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.
LPU port	Whether the line clock input port takes effect: ·     Yes—The line clock input port takes effect. ·     No—The line clock input port does not take effect. This field displays N/A for BITS 0, BITS 1, and PTP clock sources.
Frequency	Frequency of the BITS clock: ·     2 Mbps. ·     2 MHz.

 

display network-clock status

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

Syntax

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 a cluster member device by its member ID. If you do not specify a member device, this command displays information for all cluster member devices.

Examples

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

<Sysname> display network-clock status

Mode              : Auto

Reference         : N/A

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.
Reference	Manually specified clock reference. This field displays N/A if no clock reference has been specified.
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.

 

display network-clock version

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

Syntax

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 a cluster member device by its member ID. If you do not specify a member device, this command displays information for all cluster member devices.

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-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

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 a cluster member device by its member ID.

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.

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-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

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 frequency of a BITS clock is 2 Mbps (bps-2m).

Views

System view

Predefined user roles

network-admin

Parameters

chassis chassis-number: Specifies a cluster member device by its member ID.

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.

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-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

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 a cluster member device by its member ID.

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.

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-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

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

Parameters

chassis chassis-number: Specifies a cluster member device by its member ID.

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

Examples

# Specify Sa5 as the SSM bit for BITS 0.

<Sysname> system-view

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

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

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-number 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 a cluster member device by its member ID.

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 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-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

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 a cluster member device by its member ID.

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.

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-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

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 a cluster member device by its member ID.

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 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

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   : GigabitEthernet1/2/0/1

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 messages.
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

network-clock freq-deviation-detect enable

network-clock freq-deviation-threshold

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 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 1/2/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/2/0/1

[Sysname-GigabitEthernet1/2/0/1] esmc enable

Related commands

display esmc

synchronous mode

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 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 1/2/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/2/0/1

[Sysname-GigabitEthernet1/2/0/1] synchronous mode

Related commands

display esmc

esmc enable