Setting Precision Time Protocol (PTP) Parameters

Figure 8: Timing Server Config Page—PTP Pane

Timing
Server Config Page—PTP Pane

The PTP pane on the Configuration page allows you to set parameters to be part of a distributed synchronous network using Precision Time Protocol (PTP). To configure the TCA8000 or TCA8500 Timing Server to provide time synchronization:

  1. Click the Config tab. The Config page appears.
  2. Locate the PTP tab across the top of the Config page. See Figure 8.
  3. In the Profile field, select “Default” profile to use multicast PTP messages only, or “Juniper Type 1” profile to use multicast PTP messages for Announce and Sync, and unicast messages for Delay Request and Delay Response.
  4. In the Priority 1 and Priority 2 fields, enter a value within the range of 0 – 254 to configure the priorities of each master for proper Best Master Clock (BMC) algorithm operation.
  5. The Domain Number field specifies the domain number which the TCA8000 or TCA8500 Timing Server has been assigned to. Enter a value within the range of 0 – 254 to configure the PTP domain for the Timing Server, which then becomes a synchronization reference source to all the slave clocks within the same domain using the PTP protocol.
  6. In the Two Step field, select “no” to enable One-Step clock, or select “yes” to enable Two-Step clock.
  7. In the Log Mean Delay Req Interval field, select a minimum mean time interval at which you want the Timing Server to respond to successive Delay Request packets from a slave clock. The default value is 8 packets per seconds.
  8. In the Log Mean Announce Interval field, select a mean time interval between successive Announce messages. The default value is 1 packet per second.
  9. In the Log Mean Sync Interval field, select a mean time interval between successive Sync messages. The default value is 32 packets per second.
  10. Announce Receipt Timeout. The default value is 3.
  11. In the DSCP field, enter the Differential Service (DiffServ) value for the IP packet.
  12. In the Telecom Standard field, select a telecom standard to be implemented with the telecom profile for advertising the announce message. The default value is Telecom-IEEE1588.
  13. Click the Apply button to save the PTP parameter changes.

To configure the unicast related parameters:

  1. From the Delay Range lists, select the range (minimum and maximum) of delay request or response event message rate from the options: 1 packet/sec, 2 packet/sec, 4 packet/sec, 8 packet/sec, 16 packet/sec, 32 packet/sec, and 64 packet/sec.
  2. From the Announce Range lists, select the range (minimum and maximum) of announce interval message rate from the options: 1 packet/1 sec, 1packet/2 sec, 1 packet/4 sec, and 1 packet/8 sec.
  3. From the Sync Interval lists, select the range (minimum and maximum) of sync event message rate from the options: 1 packet/sec, 2 packet/sec, 4 packet/sec, 8 packet/sec, 16 packet/sec, 32 packet/sec, and 64 packet/sec.
  4. Click the Apply button to save the unicast parameter changes.

To add the Timing Clients (Slaves) for the Timing Server:

  1. In the IP Address field, enter the IP address of the Timing Client (Slave) through which the Grandmaster sends or receives event messages.
  2. Click the Add button to add the Timing Client entry in the Slave List window.

To delete the Timing Client entry:

  1. Select the Timing Client entry that you want to delete from the Slave List window.
  2. Click the Delete button to delete the entry or click the Clear All button to delete all the entries from the Slave List window.