Hi -- I'm not sure if this is a bug, or a configuration problem. I'm running ntp-stable-4.2.0a-20050720 on a FreeBSD 5.4 system with PPS kernel enabled.
I am trying to use the PPS driver with a refclock that provides only a PPS signal on the DCD line, but no other timecode. Therefore, I am using an external system as the prefer peer, and this, I think is the problem. Although the logs and billboard show that I am sync'd to the PPS signal and all appears well (ntptime also shows expected kernel pps results), there are two anomalies: 1. The "refid" is showing as the IP address of the (remote) prefer peer. 2. The stratum of the PPS clock shows as 1, not 0. As a result, the machine advertises itself to remote hosts as a stratum 2 box. Attached below are the output of ntpq -p, plus my ntp.conf file. This behaviour breaks the ability to properly use a standalone PPS source like a Cesium clock. Should it work this way? Is there something wrong with my configuration? As a workaround, I'm wondering whether the dreaded local refclock might be usable as the prefer peer, since I'm using kernel time discipline to keep it sane. Does that make sense? Thanks, John ---- Here's the output of ntpq -p: tick# ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== oPPS(0) 192.168.1.230 1 l 24 64 377 0.000 0.001 0.004 +tock.febo.com .PPSG. 1 u 20 256 377 0.465 -0.021 0.041 -toe.febo.com .PPSW. 1 u 19 256 377 0.484 -0.034 0.083 +databox.febo.co .PPSG. 1 u 18 256 377 0.335 -0.047 0.005 (192.168.1.230 is tock.febo.com) Here's ntp.conf: # tick ntp.conf logfile /var/log/ntpd driftfile /etc/ntp.drift statsdir /var/log/ntpstats/ statistics loopstats peerstats clockstats filegen loopstats file loopstats type day enable filegen peerstats file peerstats type day enable filegen clockstats file clockstats type day enable # PPS enable pps server 127.127.22.0 fudge 127.127.22.0 flag3 1 fudge 127.127.22.0 refid PPS server tock.febo.com prefer iburst server toe.febo.com iburst server databox.febo.com iburst _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
