Instance Specific Considerations¶
ptp4l¶
Default global parameters
tx_timestamp_timeout 20
summary_interval 6
clock_servo linreg
network_transport L2
time_stamping hardware
delay_mechanism E2E
boundary_clock_jbod 1
uds_address /var/run/ptp4l-<instance name>
Default interface parameters
None
Required user-supplied parameters
domainNumber <number>
Other requirements
An interface with a port must be assigned to the ptp4l instance in order
for it to start.
Note
It is recommended to configure one ptp4l instance per PHC. Some NIC
designs have a single PHC shared between all the ports on the NIC, while
others may have one PHC per port. Refer to the NIC documentation to
determine if a NIC has multiple PHCs. Configuring a ptp4l instance
with multiple interfaces, each with its own PHC results in degraded
timing accuracy or other undesirable behaviors. This means that a given
ptp4l instance should only be configured with interfaces that are on the
same NIC and share a PHC.
phc2sys¶
Default global parameters
cmdline_opts '-a -r -R 2 -u 600'
Default interface parameters
None
Required user-supplied parameters
domainNumber <number>This should match with the associated
ptp4linstance.uds_address <path>This value needs to be the same as the uds_address for the
ptp4linstance thatphc2sysis tracking.
Other requirements
The cmdline_opts are defaulted to support interaction with ptp4l. If
phc2sys is instead being used with ts2phc, this parameter will have to
be updated. See Example PTP Instance Configurations for more information.
Note
The cmdline_opts parameter overrides all default command line flags for
the service. This means that when setting cmdline_opts, the full list
of desired flags should be set.
ts2phc¶
Default global parameters
ts2phc.pulsewidth 100000000leapfile /usr/share/zoneinfo/leap-seconds.listcmdline_opts '-s nmea'
Default interface parameters
ts2phc.extts_polarity rising
Required interface parameters
ts2phc.pin_index = 1ts2phc.channel = 1
Required user-supplied parameters
This value is the path to the GNSS serial port that is connected, it will be named differently on each system.
ts2phc.nmea_serialport=/dev/gnss0
Other requirements
An interface with a port must be assigned to the ts2phc instance in order
for time to be synced from GNSS to the PHC.
clock¶
Default global parameters
There are no supported global parameters for clock type.
Default interface parameters
None
Required user-supplied parameters
None
Other requirements
The clock type instance is a special instance used for configuring the NIC control parameters of the Westport Channel, Logan Beach, E825 (GNR-D) and E830 (Connorsville) NICs clock interface parameters.
These parameters can be applied to the interface of a clock instance PTP parameters:
sma1 input/output
sma2 input/output
u.fl1 output
u.fl2 input
synce_rclka enabled
synce_rclkb enabled
sdp0
output - configure SDP0 pin as output and assign to channel 1
sdp1
input - configure SDP1 pin as input and assign to channel 1
sdp2
output - configure SDP2 pin as output and assign to channel 2
sdp3
input - configure SDP3 pin as input and assign to channel 2
period_sdp0
1pps - enable 1PPS output on SDP0 pin
1khz - enable 1 KHz output on SDP0 pin
10mhz - enable 10 MHz output on SDP0 pin
period_sdp2
1pps - enable 1PPS output on SDP2 pin
1khz - enable 1 KHz output on SDP2 pin
10mhz - enable 10 MHz output on SDP2 pin
tspll_cfg:
osc_156.25 - use the 156.25 MHz oscillator clock signal as input reference clock for the PHC
timeref_156.25 - use the 156.25 MHz DPLL clock signal (TIME_REF) as input reference clock for the PHC.
tx_clk
enet - use the 25 MHz oscillator clock signal as TX reference clock for the PHY port
synce - use the 156.25 MHz DPLL clock signal as TX reference clock for the PHY port.
eref0 - use the 156.25 MHz oscillator clock signal as TX reference clock for the PHY port
gnss-monitor¶
Default global parameters
satellite_count 5
signal_quality_db 30
cmdline_opts ‘’
Default interface parameters
None
Required user-supplied parameters
devices <space separated gnss devices to be monitored>
Other requirements
gnss-monitor represents an instance of gpsd. cmdline_opts and
devices are used on the gpsd service instantiation. Check man gpsd for
detail options. -D 7 is used for setting loglevel.
Only one instance of gnss-monitor is allowed per host. Collectd
communicates with gpsd to monitor the configured GNSS devices and
raise/clear alarms based on the configured threshold parameters
satellite_count and signal_quality_db.
