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
ptp4l
instance.uds_address <path>
This value needs to be the same as the uds_address for the
ptp4l
instance thatphc2sys
is 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 100000000
leapfile /usr/share/zoneinfo/leap-seconds.list
cmdline_opts '-s nmea'
Default interface parameters
ts2phc.extts_polarity rising
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/ttyGNSS_BBDD_0
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 or Logan Beach NIC 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