Due to a network problem on our provider, the packets were routed on a different path than usual yesterday, for several hours. This period, NTP displayed wrong offsets:
+GPS_NMEA(1) .GPS. 0 l 16 16 377 0.000 0.001 0.002 ptbtime1.ptb.de .PTB. 1 u 4 64 377 64.545 -4.450 0.140 ntps1-1.cs.tu-b .PPS. 1 u 49 64 357 65.944 -4.335 0.223 ntp-p1.obspm.fr .TS-2. 1 u 27 64 377 68.793 -4.233 0.034 GPS-1.MIT.EDU .GPS. 1 u 53 64 377 155.543 -4.491 1.779 oPPS(1) .PPS. 0 l 9 16 377 0.000 0.001 0.002 ntp1.usv.ro .PPS. 1 u 14 64 377 0.290 0.016 0.006 ntp2.usv.ro .PPS. 1 u 4 64 377 0.229 0.017 0.027 ntp3.usv.ro .PPS. 1 u 5 64 377 0.269 0.023 0.026 -ptbtime2.ptb.de .PTB. 1 u 51 64 277 64.426 -4.276 0.190 -ntp0.rrze.uni-e .GPS. 1 u 29 64 377 55.088 -4.486 0.039 +ntp1.oma.be .PPS. 1 u 64 64 377 63.900 -4.257 0.509 -time-a.nist.gov .ACTS. 1 u 11 64 373 204.117 16.101 49.841 After the problem was solved, the packets were routed on the usual path. The result is: +GPS_NMEA(1) .GPS. 0 l 35 64 377 0.000 0.001 0.002 ptbtime1.ptb.de .PTB. 1 u 48 256 377 49.194 -0.021 0.265 ntps1-1.cs.tu-b .PPS. 1 u 69 256 377 50.778 -0.044 0.675 ntp-p1.obspm.fr .TS-2. 1 u 15 256 377 53.307 0.242 0.047 GPS-1.MIT.EDU .GPS. 1 u 95 256 377 140.137 -0.414 0.637 oPPS(1) .PPS. 0 l 4 16 377 0.000 0.001 0.002 ntp1.usv.ro .PPS. 1 u 31 64 377 0.198 0.000 0.003 ntp3.usv.ro .PPS. 1 u 50 64 377 0.175 -0.002 0.004 ntp4.usv.ro .PPS. 1 u 56 64 377 0.198 -0.020 0.005 ptbtime2.ptb.de .PTB. 1 u 187 256 377 49.320 0.028 1.192 ntp0.rrze.uni-e .GPS. 1 u - 256 377 39.578 -0.073 0.028 ntp1.oma.be .PPS. 1 u 184 256 377 48.966 0.068 0.124 time-a.nist.gov .ACTS. 1 u 249 256 377 147.557 2.230 2.364 One may observe the delays were also affected during this interval. Also, the time information served to clients was affected, the pool.ntp.org monitoring system confirmed the delay - http://www.pool.ntp.org/scores/80.96.120.252. It is obvious that a server synchronizing only with Internet sources will be in error as there is has no way to determine the problem. Can someone explain this behavior ? _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
