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Example: Configuring a PTP Boundary Clock
This example shows how to configure a Precision Timing Protocol (PTP) boundary clock. A boundary clock must include the configuration of at least one primary and at least one client. The boundary primary receives time from a remote primary through the client, and in turn passes that time on to clock clients, which are in a client relationship to the boundary primary. In this example, you configure a primary, client, clock source, and clock client.
ACX5048 and ACX5096 routers do not support boundary clock.
Requirements
This example uses the following hardware and software components:
This example also applies to QFX Series switches. QFX Series switches do not support Gigabit Ethernet interfaces. Instead, configure PTP boundary clock parameters on 10-Gigabit Ethernet interfaces.
An ACX Series router
Junos OS Release 12.3 or later
Overview
In this example, the client clock or clock client immediately receives announce and synchronization packets after completion of the configuration.
Configuration
Procedure
CLI Quick Configuration
To quickly configure this example, copy the
following commands, paste them in a text file, remove any line breaks,
change any details necessary to match your network configuration,
and then copy and paste the commands into the CLI at the [edit] hierarchy level:
set protocols ptp clock-mode boundary set protocols ptp slave interface ge-1/3/9.0 unicast-mode transport ipv4 set protocols ptp slave interface ge-1/3/9.0 unicast-mode clock-source 192.1.1.2 local-ip-address 192.1.1.1 set protocols ptp master interface ge-1/0/0.0 unicast-mode transport ipv4 set protocols ptp master interface ge-1/0/0.0 unicast-mode clock-client 20.20.20.2/32 local-ip-address 20.20.20.1
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Using the CLI Editor in Configuration Mode in the CLI User Guide.
To configure a boundary clock without unicast negotiation:
Configure the clock mode.
[edit protocols ptp] user@host# set clock-mode boundary
Configure the client interface.
[edit protocols ptp] user@host# edit slave interface ge-1/3/9.0
Configure the upstream unicast PTP primary clock source parameters.
[edit protocols ptp slave interface ge-1/3/9.0] user@host# edit unicast-mode
Configure the encapsulation type for PTP packet transport.
[edit protocols ptp slave interface ge-1/3/9.0 unicast-mode ] user@host# set transport ipv4
Configure the IP address of the primary interface.
[edit protocols ptp] user@host# edit master interface ge-1/0/0.0
Specify the IP address and subnet of the remote PTP host, and the IP address of the local PTP primary interface.
[edit protocols ptp master interface ge-1/0/0.0 ] user@host# edit unicast-mode user@host# set protocols ptp master interface ge-1/0/0.0 unicast-mode clock-client 20.20.20.2/32 local-ip-address 20.20.20.1
Note:For the configuration to work, the primary interface you specify must be configured with this IP address at the [
edit interfaces interface-name] hierarchy level.Configure the encapsulation type for PTP packet transport.
[edit protocols ptp master interface ge-1/0/0.0 unicast-mode] user@host# set transport ipv4
Results
From configuration mode, confirm your configuration
by entering the show command. If the output does not display
the intended configuration, repeat the configuration instructions
in this example to correct it.
[edit protocols ptp]
user@host# show
clock-mode boundary;
slave {
interface ge-1/3/9.0 {
unicast-mode {
transport ipv4;
clock-source 192.1.1.2 local-ip-address 192.1.1.1;
}
}
}
master {
interface ge-1/0/0.0 {
unicast-mode {
transport ipv4;
clock-client 20.20.20.2/32 local-ip-address 20.20.20.1;
}
}
}After you have configured the device, enter the commit command from configuration mode.