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Setting Up an NTP-PTP Configuration Job
- 21 Jun 2024
- 6 Minutes to read
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Setting Up an NTP-PTP Configuration Job
- Updated on 21 Jun 2024
- 6 Minutes to read
- Contributors
- Print
- PDF
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The system date and time can be set automatically using either an NTP server or a PTP server. A unit can also act as an NTP server if you select the Enable NTP server option.
To set up an NTP-PTP configuration job
Access the page Commission ▶ Jobs.
Set all common configuration job settings, as described in "Creating Configuration Jobs in GUI Mode" and in "Creating Configuration Jobs Using Data Sets".
Select NTP-PTP in the left pane. The NTP-PTP tab is displayed.
Complete all fields in the NTP-PTP tab as required. For more information on specific parameters, see the table below.
Click Apply, then click Close.
Click the Refresh
button to refresh the user interface.
button to refresh the user interface.NTP-PTP tab (Commission ▶ Jobs)
Configuration
| Parameter | Description |
|---|---|
| Type | Select the type of automatic time source to be used on the device. Possible values: NTP, PTP or PTPv2. When you select a type, the relevant fields in the rest of the page are enabled. |
NTP configuration
| Parameter | Description |
|---|---|
| Enable NTP | Sets the system time automatically by polling an NTP server. Select a server from the list or add your own. |
| High resolution sync | If this field is set to True, high-resolution hardware synchronization is enabled. In this mode, the NTP server is queried multiple times and the resulting time is derived from an averaging process based on a hardware clock. If this field is set to False, the NTP server is queried only every 30 minutes and the system time is set accordingly, without further processing. |
| Time interval (s) | Sets the amount of time after which the unit synchronizes with the NTP server. Expressed in seconds. Valid range is 8 to 300 seconds. |
| Number of messages | When using NTP, the number of synchronization messages exchanged with the NTP server during each time interval. Valid range is 5 to 60. |
| Pri master address Sec master address | IP addresses of the primary and secondary NTP servers. |
| Enable NTP server | Enables use of the NTP server service. The device becomes an NTP server and can be used by other devices as an NTP server. |
| Clock name | Unique identifier of a clock. |
PTP configuration
| Parameter | Description |
|---|---|
| Enable PTP | Sets the system time automatically by polling a PTP master. The unit uses the masters from the list according to the Precision Time Protocol. |
| UTC offset for master enable | When using PTP, enable the use of UTC offset from the master clock. |
| Pri master address Sec master address | The IP address of the primary PTP server. The IP address of the secondary PTP server. |
| Pri domain number Sec domain number | When using PTP, the domain number of the primary and secondary PTP servers. |
| Announce interval | When using PTP, the announce interval for unicast negotiation. The interval, expressed in seconds, is the base 2 logarithm of the Announce interval. For example, if -1 is selected, the announce interval is 0.5 seconds. Possible values are:
|
| Sync interval | When using PTP, the synchronization interval for unicast negotiation. The interval, expressed in seconds, is the base 2 logarithm of the Sync Interval. For example, if -3 is selected, the announce interval is 0.125 seconds. Possible values are:
|
Priority settings
| Parameter | Description |
|---|---|
| DSCP | The priority for the DSCP (Differentiated Services Code Point ) can be set by selecting a value in the drop-down list. |
| VLAN Priority | If the link is through a VLAN, the priority of the VLAN frames can be set in the VLAN priority bits. Possible values: 0 to 7 |
PTPv2 configuration
Supported devices:
- Skylight element LT
- Skylight element LX
| Parameter | Description |
|---|---|
| Clock enable | Enables the PTP Precision Time Protocol clock synchronisation module. |
| Inbound criterion | Max threshold for synchronisation to declare synchronisation state. Available options are 1 microsecond, 100 microseconds or class-b Note: The class-b option is available only for platforms (e.g: LX-SyncE) that support Class-B compliant (See ITU-T G.8273.2) |
| Prio1 | A user configurable designation, where the clock belongs to an ordered set of clocks from which a master is selected. Acceptable values range from 0 to 255 |
| Clock class | An attribute defining a clock’s TAI traceability Acceptable values range from 0 to 254. |
| PTP profile | Default PTP profiles set by the administrator. PTP (IEEE1588-2008) introduced Profile, permitting a liberty on prerequisites, parameters, and algorithm to handle the synchronisation. Supported profiles:
|
| Prio2 | A user configurable designation, which provides finer grained ordering among otherwise equivalent clocks. Acceptable values range from 0 to 255 |
General
| Parameter | Description |
|---|---|
| PTP port name | Name of the PTP port. |
| Domain | The domain number. Range: 0-255 |
| Mode | Multicast or Unicast |
| Port mode | The PTP port mode. Specifies the state of PTP port. Possible values:
|
| Unicast Interval | Interval between request of Announce/Sync/Delay Response interval; expressed in seconds. Acceptable values range from 60 to 1000. |
Message frequencies
| Parameter | Description |
|---|---|
| Announce | Specifies the interval of Announce messages. Possible values are:
|
| Announce Receipt Timeout | Specifies the number of Announce messages that can be lost before a timeout occurs. Range: 2-10 (default is 3) |
| Sync Interval | Specifies the interval of Sync messages. Possible values are:
|
| Sync Rec Timeout | Specifies the number of Sync messages that can be lost before a timeout occurs. Range 2-10 (default is 3) |
| Delay Request Offset | Specifies delay request offset based on the sync interval. Range: 0-5 |
| Delay Response Timeout | Specifies the number of Delay Response messages that can be lost before a timeout occurs. Range 2-10 (default is 3) |
| Default Priority | The localPriority is assigned to a PTP port. This attribute is used when configuring the PTP port in the Telecom Profile ITU-T G.8275.1. Range: 1-255 |
Network
| Parameter | Description |
|---|---|
| Address | The layer-2 multicast destination address. Both the non-forwardable multicast address 01-80-C2-00-00-0E and the forwardable multicast address 01-1B-19-00-00-00 are supported. |
| Interface | A name to identify the interface. Indicates the interface used to exchange the PTP messages. Default is Management. |
| DiffServ Code Point | The DiffServ Code Point to set in the generated packets. Applies to Layer-3 traffic only. Expected length: 6 bits |
| Priority Code Point | When using PTP, the priority of the VLAN frames can be set in the VLAN priority bits if the link is through a VLAN. Range: 0-7 |
| Time to live | The Time To Live (TTL) is the limit on the number of hops a packet is allowed before it is dropped. Range: 1-255 |
GRANTOR
| Parameter | Description |
|---|---|
| Grantor name | Name of the PTP grantor. |
| PTP port name | Name of the PTP port. |
| Hostname / Address | Name or Address of the PTP master. |
| Domain number | The domain number. Range 0-255. |
| Interface | Name of the interface used to communicate with the PTP master. Default is Management. |
| Priority | The priority of PTP master. Acceptable values: 0 (disabled), 1 (best) and 2 (worst). |
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