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Example: Configuring Synchronous Ethernet on MX Series Routers

Requirements

• One MX80-T, MX5-T, MX10-T, MX40-T, MX80, MX240, MX480, or MX960 router
• Junos OS Release 10.4 or later for MX80 3D Universal Edge Routers and 11.2R4 or later for MX80-T, MX5, MX10, MX40, MX240, MX480, and MX960 routers.

Overview

You can configure Synchronous Ethernet on MX5-T, MX10-T, MX40-T, MX80, MX80-T, MX240, MX480, and MX960 routers, which enables you to synchronize clocks between nodes in a network through frequency synchronization.

Note: You can set the values for each parameter according to your requirement. The values given in this example are for illustration purposes only.

Configuration

CLI Quick Configuration

To quickly configure synchronization on the aforementioned routers, copy the following commands, paste them in a text file, remove any line breaks, and then copy and paste the commands into the CLI.

[edit]

set chassis synchronization clock-mode auto-select
set chassis synchronization network-type option-1
set chassis synchronization quality-mode-enable
set chassis synchronization selection-mode configured-quality
set chassis synchronization switchover-mode revertive
set chassis synchronization hold-interval configuration-change 1 restart 1 switchover 1
set chassis synchronization esmc-transmit interfaces ge-2/0/0
set chassis synchronization source external-a priority 2 quality-level prc request force-switch
set chassis synchronization interfaces ge-2/0/0 priority 1 quality-level prc request force-switch wait-to-restore 1

Step-by-Step Procedure

1. Configure the clock mode, network type, quality mode, selection mode, and switchover mode.
   [edit chassis synchronization]user@host# set clock-mode auto-select network-type option-1 quality-mode-enable selection-mode configured-quality switchover-mode revertive
2. Configure the hold interval for configuration change, restart interval, and the switchover interval in seconds.
   [edit chassis synchronization]user@host# set hold-interval configuration-change 1 restart 1 switchover 1
3. Configure the interfaces for transmitting ESMC.
   [edit chassis synchronization]user@host# set esmc-transmit interfaces ge-2/0/0
4. Configure the source node with its quality level, priority, and request type.
   [edit chassis synchronization]user@host# set source external-a priority 2 quality-level prc request force-switch
5. Configure the interfaces with priority, quality level, request type, and time to restore the interface to default.
   [edit chassis synchronization]user@host# set interfaces ge-2/0/0 priority 1 quality-level prc request force-switch wait-to-restore 1

Results

Display the results of the configuration:

Verification

Confirm that the configuration is working properly.

• Verifying the Basic Parameters for Synchronization
• Verifying All the Parameters for Synchronization
• Verifying the Global Configuration
• Verifying the ESMC Transmit Parameters
• Verifying the ESMC Statistics Parameters
• Verifying That the ESMC Statistics Are Cleared

Verifying the Basic Parameters for Synchronization

Purpose

Verify that the basic synchronization parameters such as the current clock status, clock locked to, and configured sources are working as expected.

Action

From operational mode, enter the run show chassis synchronization command to display the synchronization details.

Meaning

The output displays the basic synchronization parameters configured on the interface.

Verifying All the Parameters for Synchronization

Purpose

Verify that all the synchronization parameters are working as expected.

Action

From operational mode, enter the run show chassis synchronization extensive command to display all the synchronization details.

Meaning

The output displays all the synchronization parameters configured on the interface.

Verifying the Global Configuration

Purpose

Verify that all the global configuration parameters are working as expected.

Action

From operational mode, enter the run show synchronous-ethernet global-information command to display the set parameters for the global configuration.

Meaning

The output displays global information about the configured node.

Verifying the ESMC Transmit Parameters

Purpose

Verify that the transmission parameters of ESMC on the interface are working as expected.

Action

From operational mode, enter the run show synchronous-ethernet esmc transmit detail command to display the set parameters for the ESMC transmission.

Meaning

The output displays all the transmission details about the configured ESMC interface.

Verifying the ESMC Statistics Parameters

Purpose

Verify the statistics related to ESMC on the interface.

Action

From operational mode, enter the run show synchronous-ethernet esmc statistics command to display the statistics for the ESMC transmission.

Meaning

The output displays information about the ESMC statistics.

Verifying That the ESMC Statistics Are Cleared

Purpose

Clear the statistics related to ESMC on the interface.

Action

From operational mode, enter the clear synchronous-ethernet esmc statistics command to clear the statistics for the ESMC transmission.

Meaning

The output displays the message that the ESMC statistics have been cleared.