S o n o m a U s e r M a n u a l
33
"Smarter Timing Solutions"
Chapter
Four
Precision Time Protocol (PTP/IEEE-1588)
This chapter contains the conguration and status information for the optional Precision Time Pro-
tocol. PTP version 2 is supported. The PTP protocol running on the Sonoma is a full Grandmaster
Clock (default prole) implementation of the IEEE-1588-2008 standard.
Option
The PTP/IEEE-1588 protocol is an optional feature in the Sonoma Time Server. Read Chapter 10
- Options, Software Options if you need information on how to install a software option. To see
whether this option is installed on your Sonoma, use the get_sw_opts command:
Command: get_sw_opts
Sonoma reply: 00000000000000000000000000000000
In this case, there is no PTP option installed. Contact EndRun Technologies if you would like to
obtain PTP for one or both ports. In the cases below, PTP is installed.
Command: get_sw_opts
Sonoma reply: 00000000000000000000000000000001 (PTP installed on port 0 only.)
or
Sonoma reply: 00000000000000000000000000000011 (PTP installed on ports 0 and 1.)
About PTP
The PTP implementation in the Sonoma is based on the distribution at the PTPd website:
http://ptpd.sourceforge.net
For more information about the ptpd daemon and to obtain PTP Slave software, refer to the PTPd
website. When downloading PTP Slave software from the PTPd website, be sure to obtain this ver-
sion: ptpd-2.2.2.tar.gz.
An excellent book which describes the PTP Master and Slave operation is:
Measurement, Control, and Communication using IEEE 1588,
John C. Eidson, Springer, November 2006.
More information on IEEE-1588 PTP can be found at the NIST National Institute of Standards and
Technology IEEE 1588 website:
http://www.nist.gov/el/isd/ieee/ieee1588.cfm
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