User manual

86 Publication 1783-UM003D-EN-E - December 2009
Chapter 3
4. Enter PTP Timing Message settings, as appropriate.
IMPORTANT
When changing the PTP timing message settings, remember
that the system will not operate properly unless all devices in
the system have the same values.
PTP Timing Message Settings
Setting Description
Interface The number of the switch port, including port type (such as Fa for Fast Ethernet and Gi for
Gigabit Ethernet), the base switch number (1), and the specific port number. For example:
Fa1/1 is Fast Ethernet port 1 on the base switch.
Announce Interval The time interval for sending announce messages:
• 0 means 1 second
• 1 means 2 seconds
• 2 means 4 seconds
• 3 means 8 seconds
• 4 means 16 seconds
The default is 1 (2 seconds).
Announce Receipt Timeout Interval The number of announce intervals that must pass without receipt of an announce message
from the grand master clock before the switch selects a new grand master clock. The
number can be from 2…10. The default is 3.