Hello,
I'm having some issues with the Automotive profile, namely that it doesn't
recognize the presence of a GM, even if we have one port in MASTER state,
and the only other port in the network in SLAVE state. I am verifying this
by using pmc:
gptp@gptp-desktop:~/linuxptp$ sudo pmc -u -b 1 -t 1 'GET PARENT_DATA_SET'
sending: GET PARENT_DATA_SET
202564.fffe.7440f2-0 seq 0 RESPONSE MANAGEMENT PARENT_DATA_SET
parentPortIdentity 202564.fffe.7440f2-0
parentStats 0
observedParentOffsetScaledLogVariance 0xffff
observedParentClockPhaseChangeRate 0x7fffffff
grandmasterPriority1 248
gm.ClockClass 248
gm.ClockAccuracy 0xfe
gm.OffsetScaledLogVariance 0xffff
grandmasterPriority2 248
grandmasterIdentity 202564.fffe.7440f2
489ebd.fffe.75b716-1 seq 0 RESPONSE MANAGEMENT PARENT_DATA_SET
parentPortIdentity 489ebd.fffe.75b716-0
parentStats 0
observedParentOffsetScaledLogVariance 0xffff
observedParentClockPhaseChangeRate 0x7fffffff
grandmasterPriority1 250
gm.ClockClass 255
gm.ClockAccuracy 0xfe
gm.OffsetScaledLogVariance 0xffff
grandmasterPriority2 248
grandmasterIdentity 489ebd.fffe.75b716
Above, we can see that both ports in the network show
their parentPortIdentity to be themselves. Because of this, the
TIME_STATUS_NP also shows that the gmIdentity of each port within the
network is itself. I won't show it unless it's needed, but viewing
PORT_DATA_SET shows the two ports in the network and their port state being
MASTER and SLAVE.
Background: I am using LinuxPTP in a simple 2 node network, using P2P
because I plan on introducing a switch + more slaves soon. I'm using the
automotive profile.
On the GM machine, I am using the following command to start the ptp4l
daemon: 'sudo ptp4l -i eno1 -f configs/automotive-master.cfg
--step_threshold=1 -m' with the default automotive-master.cfg.
On the Slave machine, I am using the following command to start the ptp4l
daemon: 'sudo ptp4l -i eno1 -f configs/automotive-slave.cfg
--step_threshold=1 -m' with the default automotive-slave.cfg. Both machines
are running phc2sys as well.
More importantly, I am also unable to use pmc to change ptpTimescale in the
Sync/Fup/PDelayResp/PDelayRespFup messages sent to the slave (viewed on
Wireshark). I see the correct ptpTimescale value of 1 when using 'GET
GRANDMASTER_SETTINGS_NP' however this is not reflected in the flags portion
of the PTP packet. How can I change ptpTimescale in PTP packets sent to the
slave?
Thanks in advance.
Regards,
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