PTP messages are supported through IPv4 unicast with a fixed IP header size. The following table describes the supported message rates for timeReceiver and timeTransmitter states. The ordinary clock can only be used in the timeReceiver state. The boundary clock can be in both of these states.
Support message |
timeReceiver clock |
timeTransmitter clock |
|
|---|---|---|---|
Request rate |
Grant rate |
||
Min |
Max |
||
Announce |
1 packet every 2 seconds |
1 packet every 2 seconds1 |
1 packet every 2 seconds1 |
Sync |
User-configurable with an option to configure 8/16 packets per second |
8 packets/second1 |
16 or 64 packets/second1 |
Delay_Resp |
User-configurable with an option to configure 8/16 packets per second |
8 packets/second1 |
16 or 64 packets/second1 |
Duration |
300 seconds |
1 second |
1000 seconds |
State and statistics data for each timeTransmitter clock are available to assist in the detection of failures or unusual situations.