ON THIS PAGE
Example: Configure 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 timeTransmitter and at least one timeReceiver. The boundary timeTransmitter receives time from a remote timeTransmitter through the timeReceiver, and in turn passes that time on to the timeReceiver clocks, which are in a timeReceiver relationship to the boundary timeTransmitter. In this example, you configure a timeTransmitter, timeReceiver, 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 timeReceiver 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.
To configure a boundary clock without unicast negotiation:
-
Configure the clock mode.
[edit protocols ptp] user@host# set clock-mode boundary
-
Configure the timeReceiver interface.
[edit protocols ptp] user@host# edit slave interface ge-1/3/9.0
-
Configure the upstream unicast PTP timeTransmitter 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 timeTransmitter 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 timeTransmitter 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 timeTransmitter 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.