Contents

Network synchronization commands· 1

display network-clock source· 1

network-clock source priority· 1

network-clock source ssm·· 2

Synchronous Ethernet commands· 4

display esmc· 4

esmc enable· 5

synchronous mode· 6

Network synchronization commands

Only management Ethernet interfaces support network synchronization.

display network-clock source

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

Syntax

display network-clock source

Views

Any view

Predefined user roles

network-admin

network-operator

Examples

# Display the states of clock sources.

<Sysname> display network-clock source

Reference      Signal-input    State       Selected

GPS             No             Unlocked    No        

1PPS            No             Unlocked    No        

SyncE           No             Unlocked    No        

OCXO            Yes            Locked      Yes       

Table 1 Command output

Field	Description
Reference	Clock source: ·     GPS: GPS clock source. ·     1PPS: 1PPS clock source. ·     SyncE: Synchronous Ethernet clock source. ·     OCXO: Local crystal oscillator.
Signal-input	Whether signals are input: ·     No. ·     Yes.
State	Clock source locking status: ·     Locked. ·     Unlocked.
Selected	Whether the clock source is selected as the clock reference: ·     No. ·     Yes.

 

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 source { lpuport interface-type interface-number | ptp } priority priority

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

Default

All clock sources have a priority of 255.

Views

System view

Predefined user roles

network-admin

Parameters

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

# Configure the priority of the PTP timing signal as 1.

<Sysname> system-view

[Sysname] network-clock source ptp priority 1

Related commands

display network-clock source

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

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

Default

The SSM quality level of a line clock source is SSU-B.

Views

System view

Predefined user roles

network-admin

Parameters

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.

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

This command is applicable to the synchronous Ethernet network scenario where the interface role is master and ESMC is enabled on the interface.

To modify the SSM level of a line clock source, first remove the priority configuration for the PTP timing signal.

Examples

# Configure the SSM quality level of a line clock source as PRC.

<Sysname> system-view

[Sysname] network-clock source lpuport M-GigabitEthernet 0/0/0 ssm prc

Related commands

display esmc

 

Synchronous Ethernet commands

Only management Ethernet interfaces support Synchronous Ethernet.

This feature is used for hardware frequency tuning and needs to be used in conjunction with PTP. For more information about PTP, see PTP configuration in the configuration guide for the device.

display esmc

Use display esmc to display Ethernet synchronization messaging channel (ESMC) information.

Syntax

display esmc [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-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

This command does not display ESMC information for an interface that is operating in asynchronous mode.

Examples

# Display ESMC information for all interfaces.

<Sysname> display esmc

Interface   : M-GigabitEthernet0/0/0

Mode        : Synchronous

ESMC status : Enable

Port status : Up

Duplex mode : Full

QL received : QL-DNU

QL sent     : QL-PRC

ESMC information packets received : 15

ESMC information packets sent     : 15

ESMC event packets received       : 0

ESMC event packets sent           : 0

ESMC information rate             : 1 packets/sec

ESMC expiration                   : 5 seconds

Table 2 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.

‌

esmc enable

Use esmc enable to enable ESMC on an Ethernet interface.

Use undo esmc enable to disable ESMC on an Ethernet interface.

Syntax

esmc enable

undo esmc enable

Default

ESMC is disabled on Ethernet interfaces.

Views

Management Ethernet interface view

Predefined user roles

network-admin

Usage guidelines

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

Examples

# Enable ESMC on M-GigabitEthernet 0/0/0.

<Sysname> system-view

[Sysname] interface M-GigabitEthernet 0/0/0

[Sysname- M-GigabitEthernet0/0/0] 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.

Views

Management Ethernet interface view

Predefined user roles

network-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 M-GigabitEthernet0/0/0.

<Sysname> system-view

[Sysname] interface M-GigabitEthernet 0/0/0

[Sysname- M-GigabitEthernet0/0/0] synchronous mode

Related commands

display esmc

esmc enable