Example: Configure Synchronous Ethernet
You can configure Synchronous Ethernet, which enables you to synchronize clocks between nodes in a network through frequency synchronization.
Example Prerequisites
|
Hardware requirements |
One of MX240, MX480, or MX960 router |
|
Software requirements |
Junos 11.2R4 or later |
Overview
You can configure Synchronous Ethernet, which enables you to synchronize clocks between nodes in a network through frequency synchronization.
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.
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
Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For instructions on how to do that, see Using the CLI Editor in Configuration Mode in the CLI User Guide.
To configure Synchronous Ethernet, perform the following tasks:
-
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
-
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
-
Configure the interfaces for transmitting ESMC.
[edit chassis synchronization] user@host# set esmc-transmit interfaces ge-2/0/0
-
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
-
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:
user@host# show chassis
synchronization {
clock-mode auto-select;
esmc-transmit {
interfaces ge-2/0/0;
}
hold-interval {
configuration-change 1;
restart 1;
switchover 1;
}
network-type option-1;
quality-mode-enable;
selection-mode configured-quality;
switchover-mode revertive;
source {
external-a {
priority 2;
quality-level prc;
request force-switch;
}
interfaces ge-2/0/0 {
priority 1;
quality-level prc;
request force-switch;
wait-to-restore 1;
}
}
}
Verification
Confirm that the configuration is working properly.
- Verify the Basic Parameters for Synchronization
- Verify All the Parameters for Synchronization
- Verify the Global Configuration
- Verify the ESMC Transmit Parameters
- Verify the ESMC Statistics Parameters
- Verify that the ESMC Statistics are Cleared
Verify 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.
Verify 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.
Verify 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.
Verify 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.
Verify 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.
Verify 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.