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play_arrow Overview
play_arrow Precision Time Protocol
- play_arrow Precision Time Protocol Overview
- play_arrow Precision Time Protocol Clocks
- play_arrow Precision Time Protocol Profiles
- play_arrow PHY Timestamping
- play_arrow Precision Time Protocol over Ethernet
- play_arrow Precision Time Protocol Additional Features
play_arrow Global Navigation Satellite System (GNSS)
- play_arrow GPS Systems on Routing Platforms
  - Global Positioning System (GPS) on Routing Platforms
- play_arrow Integrated GNSS on Routing Platforms
  - Integrated Global Navigation Satellite System (GNSS) on Routing Platforms
- play_arrow GNSS Configuration for Routers Using External GNSS Receiver
- play_arrow Assisted Partial Timing Support (APTS) on Routing Platforms
play_arrow Network Time Protocol
- play_arrow NTP Concepts
- play_arrow NTP Configuration Examples
play_arrow Synchronous Ethernet
- play_arrow Synchronous Ethernet Overview
- play_arrow Synchronous Ethernet on 10-Gigabit Ethernet MIC
  - Synchronous Ethernet on 10-Gigabit Ethernet MIC
  - Example: Configure Framing Mode for Synchronous Ethernet with 10-Gigabit Ethernet MIC
play_arrow Clock Synchronization
- play_arrow Clock Synchronization Concepts
- play_arrow Clock Synchronization for ACX Series Routers
  - Configure External Clock Synchronization for ACX Series Routers
- play_arrow Clock Synchronization for MX Series Routers
  - Configure External Clock Synchronization for MX Series Routers
- play_arrow Clock Synchronization for PTX Series Routers
  - Clock Sources for PTX Series Routers
  - Synchronize Internal Stratum 3 Clock to External Clock Sources on PTX Series Routers
- play_arrow Centralized Clocking
play_arrow Hybrid Mode
- play_arrow Hybrid Mode Overview
  - Hybrid Mode
  - Guidelines to Configure Hybrid Mode on ACX Series Routers
- play_arrow Hybrid Mode and ESMC Quality-Level Mapping
play_arrow Configuration Statements and Operational Commands
- Junos CLI Reference Overview
play_arrow Appendix
- Appendix - Inclusive Terms

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English

Configure PTP TimeTransmitter Clock

date_range 20-Dec-24

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This topic talks about configuring PTP timeTransmitter boundary clock interface and parameters.

A Precision Time Protocol (PTP) timeTransmitter clock in either boundary or ordinary clock mode sends PTP messages to the timeReceiver clocks so that they can establish their relative time offset from this timeTransmitter’s clock or clock reference. You cannot configure an ordinary timeTransmitter clock on a device. The timeTransmitter boundary clock synchronizes time through a boundary timeReceiver port. To configure a timeTransmitter boundary clock, you must include the boundary statement at the [edit protocols ptp clock-mode] hierarchy level and at least one timeTransmitter with the master statement and at least one timeReceiver with the slave statement at the [edit protocols ptp] hierarchy level. ACX5048 and ACX5096 routers do not support ordinary and boundary clock.

To configure a PTP timeTransmitter clock, complete the following tasks:

Configure PTP TimeTransmitter Boundary Clock Parameters

To configure the parameters of a PTP timeTransmitter boundary clock:

Configure the clock mode.

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[edit protocols ptp]
user@host# set clock-mode (boundary | ordinary)

Configure the timeTransmitter clock.
```
[edit protocols ptp]
user@host# edit master
```
(Optional) Specify the log mean interval between announce messages—from 0 through 4. By default, one announce message is sent every two seconds. This configuration is used for manual clock clients. The timeTransmitter boundary clock sends announce messages to manual clock clients as specified in the announce-interval value.
```
[edit protocols ptp master]
user@host# set announce-interval announce-interval-value
```
Configure the interface on which to respond to downstream clock clients and timeReceiver clocks.
```
[edit protocols ptp master]
user@host# edit interface interface-name
```
(Optional) Specify the maximum log mean interval between announce messages—from 0 through 4. The default value is 4.
```
[edit protocols ptp master]
user@host# set max-announce-interval max-announce-interval-value
```
(Optional) Specify the maximum log mean interval between delay-response messages—from –7 through 4. The default value is 4.
```
[edit protocols ptp master]
user@host# set max-delay-response-interval max-delay-response-interval-value
```
(Optional) Specify the maximum log mean interval between synchronization messages—from –7 through 4. The default value is 4.
```
[edit protocols ptp master]
user@host# set max-sync-interval max-sync-interval-value
```
(Optional) Specify the minimum log mean interval between announce messages—from –0 through 4. The default value is 0.
```
[edit protocols ptp master]
user@host# set min-announce-interval min-announce-interval
```
(Optional) Specify the minimum log mean interval between delay-response messages—from –7 through 4. The default value is –7.
```
[edit protocols ptp master]
user@host# set min-delay-response-interval min-delay-response-interval
```
(Optional) Specify the minimum log mean interval between synchronization messages—from –7 through 4. The default value is –7.
```
[edit protocols ptp master]
user@host# set min-sync-interval min-sync-interval-value
```
(Optional) Specify the log mean interval between synchronization messages—from –7 through 4. The default value is –6. This configuration is used for manual clock clients. The timeTransmitter boundary clock sends synchronization messages to manual clock clients as specified in the syn-interval-value statement.
```
[edit protocols ptp master]
user@host# set sync-interval sync-interval-value
```

After you have configured the PTP timeTransmitter clock parameters, enter the commit command from configuration mode.

Configure a PTP TimeTransmitter Clock Interface

After you have configured the timeTransmitter clock parameters, complete the configuration of the timeTransmitter clock by configuring an interface to act in the role of the timeTransmitter clock.

To configure a PTP timeTransmitter clock interface:

Configure the interface on which to respond to downstream PTP timeReceiver clocks or clock clients.
```
[edit protocols ptp master]
user@host# edit interface interface-name
```
Note:
For the configuration to work, the interface you specify must be configured at the [edit interfaces interface-name] hierarchy level.
On this interface, configure downstream PTP timeReceiver clocks.
```
[edit protocols ptp master interface interface-name]
user@host# edit unicast-mode
```
Configure the IP address of the remote PTP host, or configure a subnet mask so that any host belonging to that subnet can join the timeTransmitter clock. You can configure up to 512 timeReceiver clocks for each timeTransmitter boundary clock.
```
[edit protocols ptp master interface interface-name unicast-mode]
user@host# edit clock-client ip-address
```
Note:
You can configure the maximum number of timeReceiver clocks (512) in the following combination:

Automatic timeReceiver clocks 256.

Manual and secure timeReceiver clocks 256—Any combination of manual and secure timeReceiver clocks is allowed as long as the combined total amounts to 256.

You can configure a maximum of 512 timeReceiver clocks in any combination of automatic, manual, and secure timeReceiver clocks for ACX7100 devices on Junos OS Evolved.
Note:
If you need to add a new PTP configuration when you toggle from a secure timeReceiver to an automatic timeReceiver or from an automatic timeReceiver to a secure timeReceiver in the PTP configuration of a boundary clock, then you should delete the existing PTP configuration and issue the commit command. After which, you can add a new PTP configuration and issue the commit command.

Configure the IP address of the interface acting as the local PTP timeTransmitter.

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[edit protocols ptp master interface interface-name unicast-mode clock-client ip-address]
user@host# set local-ip-address local-ip-address

(Optional) When the unicast-negotiation statement is configured at the [edit protocols ptp] hierarchy level, configure a clock client to immediately receive announce and synchronization messages from the timeTransmitter boundary clock without unicast negotiation.
```
[edit protocols ptp master interface interface-name unicast-mode clock-client ip-address local-ip-address local-ip-address]
user@host# set manual
```
Specify the encapsulation type for PTP packet transport—IPv4. This statement is mandatory.
```
[edit protocols ptp master interface interface-name unicast-mode]
user@host# set transport ipv4
```

After you have configured the PTP timeTransmitter clock interface, enter the commit command from configuration mode.

arrow_backward PREVIOUS Example: Configure PTP Boundary Clock With Unicast Negotiation

NEXT arrow_forward Configure PTP TimeReceiver Clock

Timing and Synchronization Guide

ON THIS PAGE

Configure PTP TimeTransmitter Clock

Configure PTP TimeTransmitter Boundary Clock Parameters

Configure a PTP TimeTransmitter Clock Interface

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