Szablon:Webnative ptp

The PTP page of {{{model}}} time server is used to configure and run PTP protocol.

Switching on PTP enables PTP grandmaster daemon.

PTP options

Option name	Value type/possible values	Description
PTP	Disabled/Grandmaster/Slave	Enabled PTP as Master/Slave.
PTP Options
Domain number	Number [0...255]	A domain does define the scope of PTP message communication, state, operations, data sets, and timescale. Devices synchronize only to PTP devices within same domain. Multiple domains mayy be used in signle network.
Profile	IEEE1588/802.1AS	Defines whether synchronization is performed using standard PTP (IEEE1588) or gPTP (802.1AS).
Transport layer	L2/L4	L2 (Ethernet): PTP packets are encapsulated directly in Ethernet frames (IEEE 802.3 network transport) L4 (UDP): PTP packets are exchanged over UDP/IPv4
IP mode	multicast/unicast/hybrid
Delay mechanism	E2E/P2P	E2E: Delay is measured end-to-end. Delay is calculated for the whole path P2P: Delay is measured peer-to-peer. If transparent clocks are present in a network, they need to support peer-delay mechanism (and have it enabled)
gPTP Slave type	Slave-only/Master-capable	Defines whether gPTP Slave device may become a Master in the network in case there is no other available. Cannot become Grandmaster.
PTP Master configuration
Priority1	Number [0...255]	The attribute priority1 is used in the execution of the best master clock algorithm. Lower values take precedence. This is primarily checked field in best master clock algorithm.
Priority2	Number [0...255]	The attribute priority2 is used in the execution of the best master clock algorithm. Lower values take precedence. This field is after clock class, accuracy and variance.
Sync interval	Number (log2) [-7...7] (recommended [-3...3])	Interval for PTP Sync messages to be sent. Unit used is log2 (logarithm 2), e.g. -4: 62.5ms (1/16 s) -3: 125ms (1/8 s) -2: 250ms (1/4 s) -1: 0.5s (1/2 s) 0: 1 second (typical interval) 1: 2 seconds (default) 2: 4 seconds 3: 8 seconds 4: 16 seconds NOTE: Editing this and following attributes must be done with caution.
Announce interval	Number (log2)	Interval for PTP Announce messages to be sent.
Min Delay Request Interval	Number (log2)	Interval for PTP Delay_Request messages to be sent to host.
Min pDelay Request Interval	Number (log2)	Interval for PTP Peer_Delay_Request messages to be sent to host.
Sync receipt timeout	Number (log2)	Timeout value of PTP Sync messages. Defines for how long obtained time is marked as valid.
PTP Grandmaster dataset
Grandmaster dataset mode	Auto/Manual	Allows selection between constant UTC-TAI offset and automatically calculated measured one. Usage of this (manual) is for testing purposes mostly.
UTC Offset Valid	Valid/Invalid	Allows to mark whether custom UTC-TAI offset shall be marked as valid.
UTC offset	Number	Defines custom UTC-TAI offset if used.

Additional settings (available via SSH only):

• All settings listed in https://linux.die.net/man/8/ptp4l, located in /etc/ptp4l.cfg file on system. Note that some are automatically adjusted by software.

PTP client implementation on Windows 10 and Server 2019

Requirements

PTP client is supported on Windows 10 and Windows Server 2019. At least 1809 update version must be installed on the system

Implementation procedure

First add the PtPClient registry key to your Windows register. Already prepared file can be downloaded in [[{{{model}}} Download Zone]].

Change the registry keys to configure PTP and disable other client providers (NTP, VMIC etc.). Please modify the below root keys manually:

HKLM\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\PtpClient

HKLM\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient

HKLM\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\VMICTimeProvider

Then restart the Windows Time Service. You can do this by pressing Win + R keys, type services.msc and right click on W32tm (Windows Time) service -> Restart.

After W32tm restarting, create the rules in firewall to allow the PTP Client to communicate with the time server (UDP protocol):

Verify if PTP Time Provider is enabled using w32tm /query /configuration command. Then verify that the system is synchronizing with PTP Source Server using w32tm /query /status /verbose command. The output should be as below:

ReferenceId: 0x4D505450 indicates that the PTP provider is in use.

[[Category:{{{model}}} User Manual]]