EndRun Meridian II, User Manual

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M e r i d i a n I I U s e r M a n u a l 91
"Smarter Timing Solutions"
Chapter
Nine
Optional Precision Time Protocol (PTP/IEEE-1588)
This chapter contains the configuration and status information for the optional Precision Time Pro-
tocol. PTP version 2 is supported. The PTP protocol running on Meridian II is a full Grandmaster
Clock (default profile) implementation of the IEEE-1588-2008 standard.
About PTP
The PTP implementation in Meridian II 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
Two Gigabit Ports
The PTP daemon status and configuration is supported from two PTP companion utilities
ptpstatx
and
ptpconfigx
, where x is network port 0 (
eth0)
or 1 (
eth1)
. The following table shows Merid-
ian II utilities that pertain to PTP:
Daemon Status Configuration
PTP
ptpd0
ptpd1 ptpstat0
ptpstat1 ptpconfig0
ptpconfig1
PTP can be enabled on one or both network ports (
eth0
and
eth1
). If PTP is enabled on only one
port, then
eth0
is the network port identifier and you would use
ptpstat0
and
ptpconfig0
for
PTP status and configuration. If PTP is enabled on both ports, then both
eth0
and
eth1
will be used.