User manual

Publication 1783-UM003D-EN-E - December 2009 87
Chapter 3
5. Click Submit.
Delay Request Interval The time interval recommended to connected devices to send delay request messages
when the switch port is in the master state:
• -1 means half second
• 0 means 1 second
• 1 means 2 seconds
• 2 means 4 seconds
• 3 means 8 seconds
• 4 means 16 seconds
• 5 means 32 seconds
• 6 means 64 seconds
The default is 5 (32 seconds).
Sync Interval The time interval for sending synchronization messages:
• -1 means half second
• 0 means 1 second
• 1 means 2 seconds
The default is 0 (1 second).
Sync Limit The maximum clock offset before PTP attempts to reacquire synchronization. The value can
be from 50…500,000,000 nanoseconds. The default is 50,000 nanoseconds.
We recommend against setting the sync limit below the default (50,000 nanoseconds).
Use values below 50,000 nanoseconds only in networks with a very high-precision grand
master clock. These networks would have a critical need to keep very sensitive devices
synchronized.
PTP Timing Message Settings
Setting Description