Sorry, just getting around to this...
On Thu, Jan 24, 2019 at 07:23:38AM +0000, Ravali Potineni wrote: > I have been trying to run ptp4l in transparent clock(TC) mode with > the setup as follows - I have connected 'eth1' of zcu102(let's call > this board-1) to intel card PC and 'eth2' of it to 'eth1' of another > zcu102(let's call it board-2). So we have: [PC]---[eth1 board-1 eth2]---[eth1 board-2 eth2] > I have run ptp4l in TC mode on board-1 with the command "ptp4l -P -2 -H -i > eth1 -i eth2 -p /dev/ptp0 -m -f /usr/sbin/ptp4l_slave.conf". > /usr/sbin/ptp4l_slave.conf has the following configuration: Do you really need '-p' ? (I suspect not.) > [global] > transportSpecific 1 > priority1 250 The TC should run at the lowest priority (ie highest value of 254). It should never, never become the GM! > I have also tried to give '-t' option but it says "ptp4l: invalid option -- > 't'". Oops, that was from an early version of the TC work. There is no -t option! I just fixed the usage message now. > I have made the following observations: On board-2, ptp4l doesn't > synchronize with PC. Nor it recognizes PC as grand master. It prints > the following messages: > I have also observed that when 'free_running' field is removed from > configuration of board-1 and let the synchronization with PC start > on board-1, board-2 starts synchronizing with PC. Within 1-2 > seconds, if free_running is added back to the configuration, board-1 > stops synchronization, but board-2 keeps synchronizing. Strange. > In either case, announce messages are being received on board-2 > which have grandmasterClockIdentity as the MAC address of PC. Hm. > I believe in the ideal case, board-2 should start synchronization > and board-1 shouldn't even when free_running is present in > configuration. Please let me know what is it that I'm doing wrong. Yes, that is the idea. Can you try board-1 with priority1=254 please? I don't immediately see why your setup fails (since the PC has the highest priority), but the intention was that the TC always have lowest priority (see the example in configs/P2P-TC.cfg). Thanks, Richard _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
