On Tue, Mar 05, 2019 at 01:16:27PM +0000, C. Devereaux wrote: > How do you specify the UTC offset? (I’m afraid 37 will change to 38, etc)
There is a "utc_offset" option. > > I think you need one of them to be synchronized to the system clock > (using very small PI constants) as I suggested before. The other > interface needs to be synchronized to the first interface using > default PI constants or linreg. ptp4l needs to be configured with the > boundary_clock_jbod option. > So do you mean, on server1 for both on eth2 (server1 to server 2) and eth3 > (server 1 to server 3) > /usr/sbin/phc2sys -s CLOCK_REALTIME -c %i -r -r -P 1e-4 -I 1e-8 -O37 In this case only one interface should be synchronized directly to the system clock (synchronized by NTP). -r doesn't do anything without -a. phc2sys -s CLOCK_REALTIME -c eth1 -P 1e-4 -I 1e-8 -O 37 phc2sys -s eth1 -c eth2 -O 0 > On server 3 and server 2 direct link to server1: > /usr/sbin/phc2sys -s eth1 -c %i -r -r E lingreg > On server 3 and server 2 direct link to eachother: > /usr/sbin/phc2sys -s CLOCK_REALTIME -c %i -r -r-P 1e-4 -I 1e-8 > --boundary_clock_jbod 1 I'm not sure what this is supposed to do. The jbod option belongs to ptp4l. There can be only one process synchronizing each clock. A single phc2sys -a using one or two -r should be enough. When the server 1 goes down, the other servers will synchronize to one of their interfaces (or system clock with -r -r). When server 1 is back, they will quickly resynchronize with it. That may or may not be what you want. -- Miroslav Lichvar _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
