[ntp:questions] The "best" WAN clock is an outlyer?

Jos vd Ven jacmvdven at gmail.com
Sat Nov 9 13:52:32 UTC 2013


This is the output of ntpq -p

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
o127.127.20.0    .GPS.            0 l   15   16  377    0.000   -0.001   0.002
+193.190.230.65  .PPS.            1 u   52   64  377   14.094    1.934   0.570
+193.190.230.66  .PPS.            1 u    2   64  377   14.585    2.141   0.610
+193.79.237.14   .PPS.            1 u   64   64  377   10.131    2.372   0.512
+192.87.36.4     .GPS.            1 u   15   64  377   11.980    1.815   0.556
-192.87.110.2    .GPS.            1 u   38   64  377    9.901   -0.399   0.742
+195.169.124.100 .PPS.            1 u   63   64  377   11.958    1.806   1.396
+194.171.167.130 .PPS.            1 u   48   64  377   12.612    2.165   0.439
*192.87.106.3    .PPS.            1 u    9   64  377    8.953    1.849   1.577

This is output extracted from peerstats:

peerstats:25: 56605 281.196 192.87.110.2 9324 0.000683433 0.010041925 0.002344890 0.001821083
peerstats:30: 56605 346.196 192.87.110.2 9324 -0.000768714 0.009730839 0.001118579 0.002451716
peerstats:75: 56605 876.199 192.87.110.2 9324 0.000324387 0.010130874 0.002705946 0.000458637
peerstats:96: 56605 1137.196 192.87.110.2 9324 -0.000440967 0.009617958 0.002322445 0.001050242
peerstats:105: 56605 1204.195 192.87.110.2 9324 0.000186007 0.009049798 0.001345388 0.000564607
peerstats:145: 56605 1667.195 192.87.110.2 9324 0.000397676 0.008980702 0.002208176 0.000461157
peerstats:189: 56605 2193.197 192.87.110.2 9324 -0.000584513 0.009416982 0.002894083 0.001716969
peerstats:199: 56605 2323.195 192.87.110.2 9324 -0.000182915 0.009045836 0.002265015 0.001219795
peerstats:250: 56605 2856.196 192.87.110.2 9324 0.000580176 0.009329076 0.001078025 0.002148735
peerstats:296: 56605 3380.197 192.87.110.2 9324 -0.000337560 0.009479852 0.002786859 0.001412893
peerstats:303: 56605 3445.196 192.87.110.2 9324 -0.000335993 0.009404184 0.001743359 0.001361618
peerstats:351: 56605 3968.197 192.87.110.2 9324 -0.000113667 0.010144188 0.003257196 0.000620576
peerstats:373: 56605 4168.196 192.87.110.2 9324 0.000212352 0.009381203 0.002740744 0.000279369
peerstats:416: 56605 4696.197 192.87.110.2 9324 0.000728232 0.009419911 0.002424100 0.000739515
peerstats:454: 56605 5087.196 192.87.110.2 9324 -0.000891957 0.009819816 0.002425101 0.001688007
peerstats:485: 56605 5415.196 192.87.110.2 9324 -0.000449861 0.010001508 0.003122721 0.001344518
peerstats:497: 56605 5548.196 192.87.110.2 9324 -0.000379141 0.009268564 0.002261679 0.000956447
peerstats:544: 56605 6073.197 192.87.110.2 9324 -0.000221298 0.009700235 0.003851214 0.000619356
peerstats:555: 56605 6204.196 192.87.110.2 9324 0.000248775 0.009603945 0.001910293 0.000673301
peerstats:561: 56605 6271.196 192.87.110.2 9324 -0.000561658 0.009363627 0.001434685 0.000477145
peerstats:604: 56605 6789.195 192.87.110.2 9324 -0.000208277 0.009087414 0.001799724 0.001056124
peerstats:658: 56605 7312.196 192.87.110.2 9324 0.000374562 0.009832688 0.003979007 0.000701595
peerstats:663: 56605 7379.196 192.87.110.2 9324 0.000322779 0.009552632 0.002451875 0.000706891
peerstats:670: 56605 7446.196 192.87.110.2 9324 0.000650456 0.009481864 0.001655291 0.000696570
peerstats:716: 56605 7968.196 192.87.110.2 9324 0.000562873 0.009703842 0.003132971 0.000777932
peerstats:723: 56605 8033.196 192.87.110.2 9324 0.000777103 0.009285835 0.001983064 0.000755481
peerstats:768: 56605 8555.196 192.87.110.2 9324 -0.000522393 0.009572264 0.004874316 0.001123451
peerstats:774: 56605 8622.196 192.87.110.2 9324 0.000636893 0.009695220 0.001945392 0.000815786
peerstats:819: 56605 9147.197 192.87.110.2 9324 -0.000481294 0.010388673 0.003656634 0.001824006
peerstats:826: 56605 9212.195 192.87.110.2 9324 -0.000950694 0.008805236 0.002290859 0.002043471
peerstats:873: 56605 9732.197 192.87.110.2 9324 -0.001092628 0.009312570 0.005214567 0.001472556
peerstats:883: 56605 9861.196 192.87.110.2 9324 -0.000488224 0.009660118 0.003101329 0.001023218
peerstats:905: 56605 10123.197 192.87.110.2 9324 -0.000593159 0.009771090 0.002819790 0.001389538
peerstats:913: 56605 10188.196 192.87.110.2 9324 -0.000005353 0.009429438 0.001863243 0.000826700
peerstats:947: 56605 10516.195 192.87.110.2 9324 -0.000948756 0.008980382 0.001919721 0.001445230
peerstats:992: 56605 11038.198 192.87.110.2 9324 -0.000636405 0.009627929 0.004660336 0.001475314
peerstats:997: 56605 11103.195 192.87.110.2 9324 -0.000267639 0.008967844 0.002631520 0.001053836
peerstats:1046: 56605 11624.196 192.87.110.2 9324 -0.000189695 0.009233734 0.002109452 0.001687870
peerstats:1079: 56605 12018.195 192.87.110.2 9324 -0.000771160 0.009035847 0.001949368 0.001189617
peerstats:1124: 56605 12544.197 192.87.110.2 9324 -0.000106150 0.009803253 0.003773228 0.000863366
peerstats:1133: 56605 12609.196 192.87.110.2 9324 -0.000571381 0.009567774 0.002328009 0.001170544
peerstats:1175: 56605 13130.197 192.87.110.2 9324 -0.000318280 0.009838594 0.001555103 0.001946792
peerstats:1183: 56605 13194.212 192.87.110.2 9324 0.000480550 0.009226464 0.001205878 0.001506679
peerstats:1230: 56605 13724.198 192.87.110.2 9324 0.000360159 0.009315221 0.002938905 0.000857470
peerstats:1262: 56605 14118.197 192.87.110.2 9324 0.000406928 0.009416320 0.002533906 0.000557736
peerstats:1284: 56605 14382.196 192.87.110.2 9324 -0.000243659 0.009353464 0.002612301 0.000673374
peerstats:1330: 56605 14911.198 192.87.110.2 9324 -0.000674800 0.009390110 0.003181835 0.001345081
peerstats:1361: 56605 15238.197 192.87.110.2 9324 0.000598121 0.009671187 0.004288622 0.000890193
peerstats:1367: 56605 15304.197 192.87.110.2 9324 0.000612888 0.010214138 0.001329759 0.000881611
peerstats:1381: 56605 15433.196 192.87.110.2 9324 -0.001164375 0.009247445 0.001106330 0.002372863
peerstats:1427: 56605 15948.197 192.87.110.2 9324 0.000882601 0.009833529 0.001644457 0.000716616
peerstats:1444: 56605 16142.196 192.87.110.2 9324 0.000418126 0.009485427 0.001837226 0.000592654
peerstats:1466: 56605 16404.196 192.87.110.2 9324 0.000143280 0.009301278 0.002135056 0.001983812
peerstats:1517: 56605 16929.197 192.87.110.2 9324 -0.000692222 0.009727571 0.002958541 0.001375972
peerstats:1531: 56605 17061.196 192.87.110.2 9324 0.000756472 0.009704512 0.002390647 0.000808715
peerstats:1537: 56605 17126.195 192.87.110.2 9324 -0.000912577 0.009072562 0.001613864 0.001769530
peerstats:1585: 56605 17652.197 192.87.110.2 9324 0.000561831 0.010361878 0.001622318 0.001071244
peerstats:1591: 56605 17716.196 192.87.110.2 9324 0.000360918 0.009500938 0.001262544 0.001017821
peerstats:1640: 56605 18236.196 192.87.110.2 9324 0.000466909 0.009669179 0.001491060 0.001342960
peerstats:1647: 56605 18301.196 192.87.110.2 9324 0.000062456 0.009321591 0.001001622 0.001483487
peerstats:1688: 56605 18825.197 192.87.110.2 9324 -0.001191447 0.009339233 0.005191952 0.001486218
peerstats:1695: 56605 18892.196 192.87.110.2 9324 -0.000710384 0.009878670 0.003481781 0.001046827
peerstats:1707: 56605 19024.196 192.87.110.2 9324 -0.000724047 0.009802827 0.002469748 0.001014131
peerstats:1740: 56605 19352.196 192.87.110.2 9324 0.000133834 0.009168461 0.002485681 0.000751976
peerstats:1786: 56605 19878.200 192.87.110.2 9324 -0.000304159 0.009225985 0.002852362 0.001238621
peerstats:1820: 56605 20271.196 192.87.110.2 9324 -0.001040399 0.009655048 0.002136232 0.001529516
peerstats:1849: 56605 20597.196 192.87.110.2 9324 0.000362352 0.009777345 0.003142053 0.000790189
peerstats:1855: 56605 20663.196 192.87.110.2 9324 0.000505607 0.009681623 0.002025840 0.000794919
peerstats:1895: 56605 21060.196 192.87.110.2 9324 0.000429783 0.009370397 0.002128845 0.000546509
peerstats:1932: 56605 21521.195 192.87.110.2 9324 -0.000091827 0.008724760 0.002668137 0.000564728
peerstats:1983: 56605 22046.196 192.87.110.2 9324 -0.000302802 0.009247808 0.003759392 0.000872212
peerstats:2003: 56605 22306.197 192.87.110.2 9324 -0.000422887 0.010008325 0.003227839 0.001315512
peerstats:2030: 56605 22569.197 192.87.110.2 9324 -0.000314455 0.010124557 0.003486299 0.001467431
peerstats:2036: 56605 22635.197 192.87.110.2 9324 -0.000428256 0.010050027 0.002201804 0.001467366
peerstats:2042: 56605 22699.196 192.87.110.2 9324 0.000607172 0.009234534 0.001565644 0.000789915
peerstats:2090: 56605 23221.196 192.87.110.2 9324 -0.000503626 0.009336468 0.003086502 0.001042073
peerstats:2114: 56605 23485.197 192.87.110.2 9324 0.000170541 0.009727346 0.005242815 0.000914333
peerstats:2121: 56605 23552.197 192.87.110.2 9324 -0.000488493 0.009737979 0.004400767 0.001339273
peerstats:2139: 56605 23749.195 192.87.110.2 9324 0.000044018 0.009090140 0.001040701 0.000853993
peerstats:2182: 56605 24269.196 192.87.110.2 9324 -0.000936966 0.009523505 0.002115664 0.001377634
peerstats:2212: 56605 24595.196 192.87.110.2 9324 0.000684732 0.009383468 0.001852928 0.000895301
peerstats:2253: 56605 24992.196 192.87.110.2 9324 0.000625315 0.009353641 0.002328474 0.000357820
peerstats:2260: 56605 25059.195 192.87.110.2 9324 -0.000555099 0.009130856 0.001527670 0.001218064
peerstats:2308: 56605 25583.196 192.87.110.2 9324 0.000474251 0.009864983 0.002278560 0.000560277
peerstats:2315: 56605 25649.196 192.87.110.2 9324 -0.000652087 0.009515368 0.001597813 0.001262566
peerstats:2351: 56605 26045.196 192.87.110.2 9324 -0.000317811 0.009462988 0.002205076 0.000896907
peerstats:2372: 56605 26302.195 192.87.110.2 9324 0.000330785 0.009077952 0.001857904 0.000375334
peerstats:2424: 56605 26827.197 192.87.110.2 9324 -0.000862814 0.009580434 0.004470668 0.001519875
peerstats:2429: 56605 26891.196 192.87.110.2 9324 0.000487724 0.009101886 0.002542224 0.000757214
peerstats:2473: 56605 27414.196 192.87.110.2 9324 -0.000069249 0.009423804 0.002917754 0.000768000
peerstats:2496: 56605 27674.200 192.87.110.2 9324 0.000771416 0.009824110 0.003415512 0.000639632
peerstats:2525: 56605 28002.197 192.87.110.2 9324 -0.000086178 0.009901636 0.003360201 0.000723958
peerstats:2557: 56605 28331.197 192.87.110.2 9324 -0.000656124 0.010056037 0.002894500 0.001072175
peerstats:2574: 56605 28526.196 192.87.110.2 9324 -0.000586116 0.009251621 0.002719825 0.000935761
peerstats:2624: 56605 29050.196 192.87.110.2 9324 0.000208378 0.009545764 0.001742657 0.000702212
peerstats:2630: 56605 29115.196 192.87.110.2 9324 0.000357830 0.009450227 0.001334080 0.000613766
peerstats:2674: 56605 29641.197 192.87.110.2 9324 -0.000490872 0.009514373 0.002224944 0.001121200
peerstats:2699: 56605 29969.205 192.87.110.2 9324 -0.000854466 0.009553257 0.003732032 0.002193852
peerstats:2732: 56605 30300.197 192.87.110.2 9324 0.000501959 0.010109457 0.003298741 0.001283747
peerstats:2744: 56605 30430.196 192.87.110.2 9324 0.000330851 0.009675988 0.002086196 0.001385476
peerstats:2756: 56605 30563.195 192.87.110.2 9324 -0.000623172 0.009130209 0.001155017 0.001071678
peerstats:2799: 56605 31088.197 192.87.110.2 9324 -0.000140969 0.009617343 0.003496370 0.000566805
peerstats:2826: 56605 31351.198 192.87.110.2 9324 -0.000637388 0.009907400 0.003072272 0.001317290
peerstats:2840: 56605 31481.196 192.87.110.2 9324 0.000585238 0.009701122 0.002347229 0.000651585
peerstats:2846: 56605 31546.196 192.87.110.2 9324 0.000007322 0.009392195 0.001574198 0.000893291
peerstats:2887: 56605 32070.196 192.87.110.2 9324 0.000181370 0.009772208 0.003174807 0.000550543
peerstats:2906: 56605 32264.198 192.87.110.2 9324 -0.000273083 0.009822365 0.003287661 0.000832494
peerstats:2922: 56605 32460.196 192.87.110.2 9324 0.000069498 0.009456164 0.002731719 0.000548034
peerstats:2947: 56605 32718.196 192.87.110.2 9324 -0.000289464 0.009275507 0.001481911 0.000434833
peerstats:2971: 56605 32979.195 192.87.110.2 9324 -0.000447694 0.009116122 0.001687982 0.000646611
peerstats:3013: 56605 33504.197 192.87.110.2 9324 -0.000132245 0.009666156 0.003332486 0.000803339
peerstats:3025: 56605 33634.196 192.87.110.2 9324 -0.000579833 0.009228871 0.001967362 0.001136469
peerstats:3074: 56605 34155.196 192.87.110.2 9324 -0.000725906 0.009204207 0.001708669 0.002158471
peerstats:3113: 56605 34675.197 192.87.110.2 9324 -0.000285575 0.010445795 0.004227219 0.001083247
peerstats:3120: 56605 34742.196 192.87.110.2 9324 0.000830927 0.010063195 0.002400790 0.000896159
peerstats:3157: 56605 35136.196 192.87.110.2 9324 0.000503160 0.009514104 0.002315882 0.000598488
peerstats:3193: 56605 35533.196 192.87.110.2 9324 0.000519427 0.009378798 0.002162655 0.000685961
peerstats:3241: 56605 36056.197 192.87.110.2 9324 -0.000095433 0.009559933 0.002865431 0.000957969
peerstats:3248: 56605 36120.196 192.87.110.2 9324 0.000082657 0.009272053 0.001893708 0.000811364
peerstats:3273: 56605 36379.195 192.87.110.2 9324 -0.000189227 0.009080411 0.001718686 0.002065766
peerstats:3315: 56605 36899.197 192.87.110.2 9324 0.000252750 0.009785189 0.004476643 0.000534652
peerstats:3334: 56605 37096.197 192.87.110.2 9324 0.000109183 0.009883462 0.004937368 0.000677205
peerstats:3347: 56605 37230.196 192.87.110.2 9324 0.000978405 0.009831398 0.002441155 0.000962360
peerstats:3383: 56605 37626.196 192.87.110.2 9324 -0.000473073 0.009712403 0.002454220 0.000808758
peerstats:3391: 56605 37691.196 192.87.110.2 9324 -0.001127801 0.009700553 0.001639004 0.001369484
peerstats:3417: 56605 38020.196 192.87.110.2 9324 -0.000152835 0.009521892 0.002512694 0.000535143
peerstats:3466: 56605 38536.196 192.87.110.2 9324 -0.000327083 0.009104195 0.001574785 0.005131619
peerstats:3511: 56605 39063.197 192.87.110.2 9324 0.000121334 0.009604740 0.003637055 0.000494150
peerstats:3518: 56605 39127.196 192.87.110.2 9324 0.000514384 0.009586859 0.002261974 0.000466225
peerstats:3524: 56605 39194.196 192.87.110.2 9324 -0.000905261 0.009469200 0.001471483 0.001336271
peerstats:3559: 56605 39589.196 192.87.110.2 9324 -0.000490191 0.009464558 0.002621561 0.001081811
peerstats:3576: 56605 39781.196 192.87.110.2 9324 -0.000145026 0.009451004 0.001420742 0.000704371
peerstats:3625: 56605 40306.197 192.87.110.2 9324 -0.000423790 0.010131311 0.003875243 0.001290552
peerstats:3641: 56605 40504.196 192.87.110.2 9324 -0.000698040 0.009824491 0.001849185 0.001476706
peerstats:3646: 56605 40571.196 192.87.110.2 9324 -0.000175817 0.009629482 0.001299631 0.001000266
peerstats:3696: 56605 41090.196 192.87.110.2 9324 -0.000674874 0.009411721 0.001001738 0.001909820
peerstats:3740: 56605 41610.198 192.87.110.2 9324 0.000611305 0.009919556 0.003526375 0.003549354
peerstats:3759: 56605 41811.197 192.87.110.2 9324 0.000429546 0.010060250 0.004183389 0.003442814
peerstats:3778: 56605 42008.196 192.87.110.2 9324 -0.000767827 0.009726763 0.002233559 0.001385611
peerstats:3784: 56605 42074.196 192.87.110.2 9324 -0.000599194 0.009372920 0.000984688 0.001174154
peerstats:3832: 56605 42602.197 192.87.110.2 9324 0.000588175 0.009601180 0.002268775 0.001644124
peerstats:3863: 56605 42995.197 192.87.110.2 9324 0.000235320 0.010088569 0.002291864 0.000823183
peerstats:3878: 56605 43127.196 192.87.110.2 9324 0.000425942 0.009437249 0.001874904 0.000721343
peerstats:3885: 56605 43191.196 192.87.110.2 9324 -0.000883470 0.009086416 0.001241149 0.001406707
peerstats:3924: 56605 43587.193 192.87.110.2 9324 -0.002273186 0.006678393 0.002595170 0.002249229
peerstats:3966: 56605 44110.196 192.87.110.2 9324 -0.000929637 0.009585000 0.002192192 0.001526873
peerstats:3997: 56605 44436.195 192.87.110.2 9324 0.000294493 0.008960802 0.001860015 0.000851140
peerstats:4045: 56605 44964.198 192.87.110.2 9324 -0.000765929 0.009474668 0.003156994 0.001227988
peerstats:4078: 56605 45352.196 192.87.110.2 9324 0.000398447 0.009401569 0.001767150 0.000566855
peerstats:4120: 56605 45815.196 192.87.110.2 9324 0.000163337 0.009302067 0.002397557 0.000853672
peerstats:4165: 56605 46339.198 192.87.110.2 9324 0.000823056 0.010178594 0.003850403 0.000572695
peerstats:4173: 56605 46403.196 192.87.110.2 9324 -0.000470222 0.009648706 0.002370787 0.001491377
peerstats:4220: 56605 46932.197 192.87.110.2 9324 0.000853767 0.010319230 0.003162287 0.017874211
peerstats:4246: 56605 47197.197 192.87.110.2 9324 0.000478867 0.010275730 0.001586408 0.018271748
peerstats:4256: 56605 47330.196 192.87.110.2 9324 -0.000388948 0.009520928 0.001556744 0.003524338
peerstats:4301: 56605 47854.198 192.87.110.2 9324 0.000562296 0.010129936 0.003621826 0.000752761
peerstats:4306: 56605 47921.196 192.87.110.2 9324 -0.001078091 0.009990972 0.002136648 0.002105742
peerstats:4355: 56605 48443.197 192.87.110.2 9324 0.000591792 0.010122958 0.002604462 0.000579555
peerstats:4362: 56605 48510.197 192.87.110.2 9324 0.000646801 0.010069277 0.001772253 0.000608513
peerstats:4370: 56605 48574.196 192.87.110.2 9324 -0.000399080 0.009901464 0.001350962 0.000742107

As you can see is peer 192.87.110.2 an outlyer although it seems to me as the best clock (+/- 1 ms) relative to 127.127.20.0 but not according to NTP. I know the reasoning behind a guy with one, two or three clocks, but I can't imagine that my GPS has a systematic offset of 2 ms instead of the WAN (internet) clocks.

So WAN synchronization is separated from GPS. Is this intended behavior?



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