...
| Tick | min | 25th% | avg | median | 75th% | 90th% | 95th% | max | iqr | std dev | # pairs |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20Jan01 | 280.444 | 303.117 | 312.614 | 316.141 | 321.182 | 325.130 | 325.531 | 329.477 | 18.065 | 12.637 | 20 |
| 20Jan02 | 280.498 | 297.056 | 309.626 | 314.285 | 317.884 | 324.135 | 324.826 | 325.112 | 20.828 | 12.793 | 20 |
| 20Jan03 | 280.517 | 303.163 | 312.347 | 316.178 | 321.177 | 324.280 | 324.960 | 329.499 | 18.014 | 12.433 | 20 |
| 20Jan04 | 280.461 | 303.154 | 312.365 | 316.158 | 321.146 | 324.649 | 324.978 | 329.489 | 17.992 | 12.457 | 20 |
| 20Jan05 | 280.447 | 303.144 | 312.051 | 316.130 | 321.151 | 324.690 | 324.943 | 329.539 | 18.007 | 12.395 | 20 |
| 20Jan06 | 280.451 | 296.392 | 310.530 | 315.753 | 320.903 | 324.763 | 324.981 | 329.496 | 24.511 | 13.628 | 20 |
| 20Jan07 | 280.468 | 296.436 | 310.834 | 315.841 | 321.240 | 324.988 | 325.506 | 329.450 | 24.804 | 13.775 | 20 |
| 20Jan08 | 280.476 | 303.144 | 311.708 | 314.254 | 321.011 | 325.028 | 325.524 | 329.554 | 17.867 | 12.457 | 20 |
| 20Jan09 | 280.518 | 303.151 | 311.782 | 314.255 | 319.939 | 323.939 | 325.036 | 328.314 | 16.788 | 11.658 | 20 |
| 20Jan10 | 280.465 | 300.798 | 309.671 | 311.542 | 315.925 | 324.952 | 325.496 | 328.318 | 15.127 | 12.842 | 20 |
| 20Jan11 | 280.474 | 301.814 | 309.915 | 311.603 | 315.171 | 325.012 | 325.430 | 329.738 | 13.357 | 12.748 | 20 |
| 20Jan12 | 280.515 | 296.730 | 311.775 | 315.344 | 322.416 | 324.938 | 329.779 | 330.877 | 25.686 | 14.228 | 20 |
| 20Jan13 | 280.429 | 305.275 | 311.683 | 313.730 | 316.397 | 325.007 | 325.491 | 329.706 | 11.122 | 12.046 | 20 |
| 20Jan14 | 280.531 | 303.975 | 309.400 | 311.155 | 315.672 | 318.695 | 324.584 | 329.770 | 11.697 | 11.031 | 20 |
| 20Jan15 | 296.380 | 305.315 | 313.079 | 312.597 | 318.192 | 324.055 | 325.876 | 336.248 | 12.877 | 9.760 | 20 |
| 20Jan16 | 296.726 | 305.008 | 313.498 | 312.889 | 319.100 | 325.828 | 328.229 | 336.273 | 14.092 | 10.343 | 20 |
| 20Jan17 | 301.328 | 330.032 | 348.988 | 348.759 | 355.767 | 387.082 | 392.328 | 408.823 | 25.735 | 25.731 | 20 |
| 20Jan18 | 301.306 | 330.101 | 345.969 | 348.990 | 355.285 | 366.246 | 385.621 | 389.538 | 25.184 | 21.546 | 20 |
| 20Jan19 | 301.268 | 329.970 | 346.692 | 346.227 | 355.276 | 385.389 | 389.286 | 396.487 | 25.306 | 24.191 | 20 |
| 20Jan20 | 301.307 | 327.376 | 342.864 | 340.419 | 352.677 | 369.400 | 386.111 | 389.233 | 25.301 | 22.337 | 20 |
| 20Jan21 | 301.146 | 327.248 | 346.865 | 342.833 | 352.699 | 396.258 | 412.843 | 415.990 | 25.451 | 30.435 | 20 |
| 20Jan22 | 301.350 | 323.368 | 341.581 | 339.179 | 352.644 | 369.499 | 386.202 | 389.188 | 29.276 | 23.344 | 20 |
| 20Jan23 | 305.829 | 324.277 | 342.455 | 339.436 | 352.019 | 369.405 | 386.094 | 389.259 | 27.742 | 22.234 | 20 |
| 20Jan24 | 305.722 | 323.285 | 341.580 | 338.587 | 352.055 | 366.430 | 386.448 | 389.562 | 28.770 | 22.446 | 20 |
| 20Jan25 | 305.680 | 324.671 | 342.747 | 340.071 | 351.452 | 369.217 | 385.966 | 389.601 | 26.781 | 22.061 | 20 |
| 20Jan26 | 305.761 | 323.724 | 343.401 | 349.319 | 356.299 | 386.491 | 389.553 | 389.553 | 32.575 | 22.892 | 19 |
| 20Jan27 | 305.794 | 321.125 | 341.578 | 338.668 | 352.731 | 369.613 | 386.166 | 389.261 | 31.606 | 23.321 | 20 |
The targets are
For the 7 targets in South Africa the 25%/median/75% before 2016 and after are ~294/300/306ms and 327/345/356ms.
Looking in more detail at the ping responses each hour we see a sudden step
and in more detail
The first step occurred between 08:00am and 09:00am Jan 14th, the second step between 07:00am and 08:00am Jan 16th (both times are GMT). I can find no evidence of a failure on January 14th, however it sure looks like there was one. On further inspection, it appears that this step only appears for the TENET target site (see below for the minimum RTTs in msec measured each hour (0 1 ...) from SLAC to the target (Remote-Site)Â on Jan 14th, 2020), and thus is not related to the cable problems.
For the 7 targets in South Africa the 25%/median/75% before 2016 and after are ~294/300/306ms and 327/345/356ms.
Looking in more detail at the ping responses each hour from SLAC to TENET South Africa we see a couple of sudden steps.
and in more detail
The first step occurred between 08:00am and 09:00am Jan 14th, the second step between 07:00am and 08:00am Jan 16th (both times are GMT). I can find no evidence of a failure on January 14th, however it sure looks like there was one. On further inspection, it appears that this step only appears for the TENET target site (see below for the minimum RTTs in msec measured each hour (0 1 ...) from SLAC to the target (Remote-Site)Â on Jan 14th, 2020), and thus is not related to the cable problems.
Monitoring-Site Remote-Site ? 0 1 2 3 4 5 6 7 8 9 10 11Monitoring-Site Remote-Site 12 13 ? 0 14 115 16 2 17 3 18 4 19 5 20 6 21 7 22 823 Monitoring-Node 9 10 Mon-TLD Mon-Region 11 Remote-Node 12 13 14Rem-TLD Rem-Region EDU.SLAC.STANFORD.PINGER BW.AC.BAC.WWW 15 16 17?r 323.430 323.483 323.440 18 323.527 323.338 323.437 19318.915 318.695 320.438 343.658 20 345.564 331.147 343.837 21326.039 331.680 321.791 321.934 22 321.922 322.115 321.810 23321.662 321.599 321.957 321.701 Monitoring-Node pinger.slac.stanford.edu EDU North_America Mon-TLDwww.bac.ac.bw Mon-Region Remote-Node BW Africa Rem-TLD Rem-Region EDU.SLAC.STANFORD.PINGER BW.AC.BAC.WWW BANKOFBOTSWANA.N1 ?r 323315.430727 323315.483882 323315.440738 323315.527672 323315.338758 323315.437877 318316.915134 318315.695879 320316.438063 343333.658509 345.564746 331317.147119 343330.837161 326316.039179 331324.680060 321316.791010 321315.934978 321315.922854 322315.115866 321315.810804 321315.662837 321315.599713 321315.957724 321315.701842 pinger.slac.stanford.edu EDU North_America www.bac.acbankofbotswana.bw BW Africa BW EDU.SLAC.STANFORD.PINGER AfricaBW.BTC.NS1 EDU.SLAC.STANFORD.PINGER BW.BANKOFBOTSWANA.N1 ?rB 315.727399 315.882622 315.738758 315.672422 315.758327 315.877343 316315.134536 315.879452 316315.063409 333315.509444 345316.746058 317315.119952 330315.161530 316315.179280 324315.060599 316315.010400 315.978880 315.854394 315.866349 315.804332 315.837397 315.713312 315.724698 315.842403 pinger.slac.stanford.edu EDU North_America ns1.btc.bw EDU North_America www.bankofbotswana.bw BW Africa EDU.SLAC.STANFORD.PINGER BWLS.BOS.BTC.NS1 GOV.N1 ?Br 315312.399842 315312.622871 315312.758830 315312.422884 315312.327876 315312.343887 315312.536891 315312.452929 315312.409953 315312.444976 316312.058990 315312.952809 315312.530942 315312.280840 315312.599924 315312.400910 315312.880873 315312.394885 315312.349893 315312.332796 315312.397820 315312.312840 315312.698877 315312.403846 pinger.slac.stanford.edu EDU North_America ns1www.bos.btcgov.bwls BWLS Africa EDU.SLAC.STANFORD.PINGER LS.BOSLCE.GOVAC.N1WWW ?r 312313.842298 312313.871367 312313.830335 312313.884400 312313.876375 312313.887374 312313.891433 312313.929519 312313.953521 312313.976796 312313.990998 312313.809553 312313.942403 312313.840544 312313.924423 312313.910402 312313.873361 312313.885358 312313.893372 312313.796268 312313.820329 312313.840371 312313.877393 312313.846427 pinger.slac.stanford.edu EDU North_America www.boslce.govac.ls LS Africa EDU.SLAC.STANFORD.PINGER LS.LCELEO.ACCO.WWWN1 ?rB 313329.298891 313329.367871 313329.335937 313329.400809 313329.375847 313329.374973 313329.433877 313329.519885 313329.521944 313329.796805 313329.998898 313329.553871 313329.403834 313329.544770 313329.423867 313329.402901 313329.361900 313329.358913 313329.372776 313329.268809 313329.329860 313329.371886 313329.393876 313329.427913 pinger.slac.stanford.edu EDU North_America www.lceleo.acco.ls LS Africa EDU.SLAC.STANFORD.PINGER LS.LEOLNDC.CO.N1 ?B 329.891 329.871 329.937 329.809 329.847 329.973 329.877 329.885 329.944 329.805 329.898 329.871 329.834 329.770 329.867 329.901 329.900 329.913 329.776 329.809 329.860 329.886 329.876 329.913 pinger.slac.stanford.edu EDUORG.WWW ?r . . . . . North_America www.leo.co.ls . . LS Africa. EDU.SLAC.STANFORD.PINGER LS.LNDC.ORG.WWW . ?r . . . . . . . . . . . . . pinger.slac.stanford.edu EDU North_America www.lndc.org.ls . LS .Africa EDU.SLAC.STANFORD.PINGER NA.AGRINAMIBIA.COM.N1 ?r 316.059 316.112 315.991 316.023 316.063 315.959 324.203 324.279 324.300 316.118 316.152 315.962 316.082 315.996 316.180 316.112 316.085 316.160 316.060 316.051 316.061 316.100 316.017 316.082 pinger.slac.stanford.edu EDU North_America www.lndcagrinamibia.orgcom.lsna LSNA Africa EDU.SLAC.STANFORD.PINGER NA.AGRINAMIBIA.COM.N1BRAHMAN.IWAY ?r 316.059 316.112 315.991 316.023 316.063 315.959 324.203 324.279 324.300 316.118 316.152 315.962 316.082 315.996 316.180 316.112 316.085 316.160 316.060 316.051 316.061 316.100 316.017 316.082 pinger.slac.stanford.edu EDU. North_America www.agrinamibia.com.na . NA Africa. EDU.SLAC.STANFORD.PINGER NA.BRAHMAN.IWAY . ?r . . . . . . . . . . . . pinger.slac.stanford.edu EDU North_America www.brahman.iway.na NA . Africa . EDU.SLAC.STANFORD.PINGER NA.MME.GOV.N1 . . ?B 316.476 316.546 316.501 316.480 316.587 316.452 324.635 324.729 316.452 316.492 316.617 316.492 316.496 316.422 316.489 316.580 316.644 316.568 316.499 316.504 316.450 316.471 316.522 316.419 pinger.slac.stanford.edu EDU North_America www.brahmanmme.iwaygov.na NA Africa EDU.SLAC.STANFORD.PINGER NASZ.MMEACAT.GOVORG.N1 ?B 316325.476502 316304.546647 316304.501720 316304.480756 316304.587689 316304.452832 324326.635869 324344.729121 316351.452111 316350.492593 316350.617049 316340.492553 316328.496354 316337.422106 316330.489511 316325.580965 316325.644950 316326.568011 316329.499815 316329.504824 316330.450056 316329.471972 316330.522004 316329.419891 pinger.slac.stanford.edu EDU North_America www.mmeacat.govorg.nasz NASZ Africa EDU.SLAC.STANFORD.PINGER SZ.ACATREALBROADBAND.ORG.N1CO ?Br 325.502069 304303.647975 304.720023 304.756026 304.689019 304.832121 326304.869406 344355.121842 351346.111205 350348.593319 350346.049952 340328.553566 328324.354738 337326.106837 330325.511829 325324.965329 325324.950219 326324.011102 329328.815097 329328.824116 330328.056134 329328.972286 330328.004066 329328.891144 pinger.slac.stanford.edu EDU North_America www.acatrealbroadband.orgco.sz SZ Africa EDU.SLAC.STANFORD.PINGER SZ.UNISWA.REALBROADBANDORG.COWWW ?r 325298.069450 303298.975153 304298.023117 304297.026186 304297.019131 304296.121841 304298.406139 355296.842903 346296.205395 348296.319558 346296.952601 328296.566959 324296.738640 326296.837524 325296.829668 324296.329753 324296.219702 324296.102896 328297.097137 328296.116894 328296.134587 328296.286615 328297.066133 328296.144753 pinger.slac.stanford.edu EDU North_America www.realbroadbanduniswafoundation.coorg.sz SZ Africa EDU.SLAC.STANFORD.PINGER SZZA.UNISWAAC.ORG.WWWNMMU.N1 ?r 298303.450254 298303.153259 298303.117252 297303.186242 297303.131222 296303.841224 298303.139260 296303.903255 296303.395253 296303.558287 296303.601260 296303.959199 296303.640190 296303.524171 296303.668267 296303.753228 296303.702282 296303.896280 297303.137265 296303.894179 296303.587139 296303.615188 297303.133173 296303.753249 pinger.slac.stanford.edu EDU North_America www.uniswafoundationnmmu.org.szac.za SZZA Africa EDU.SLAC.STANFORD.PINGER ZA.AC.NMMUNWU.N1 ?r 303.254 303.259 303.252 303.242 303.222 303.224 303.260 303.255 303.253 303.287 303.260 303.199 303.190 303.171 303.267 303.228 303.282 303.280 303.265 303.179 303.139 303.188 303.173 303.249 pinger.slac.stanford.edu EDU. North_America www.nmmu.ac.za . . ZA Africa. EDU.SLAC.STANFORD.PINGER ZA.AC.NWU.N1 . ?r . . . . . . . . . . . pinger.slac.stanford.edu EDU North_America www.nwu.ac.za . . ZA .Africa EDU.SLAC.STANFORD.PINGER ZA.BONTANY.UWC.AC.N1 .?r 315.577 315.549 315.543 315.623 315.598 315.537 315.603 315.560 315.556 315.569 336.325 336.267 336.290 336.224 336.356 336.402 336.354 336.385 336.349 336.416 336.351 336.299 336.341 . 336.421 pinger.slac.stanford.edu EDU North_America www196.nwu21.ac45.za139 ZA Africa EDU.SLAC.STANFORD.PINGER ZA.BONTANY.UWCDUT.AC.N1 ?r 315306.577191 315306.549324 315306.543287 315306.623328 315306.598377 315306.537398 315306.603441 315306.560591 315306.556860 315306.569605 336306.325572 336306.267618 336306.290578 336306.224474 336306.356455 336306.402428 336306.354346 336306.385378 336306.349491 336306.416318 336306.351284 336306.299395 336306.341262 336306.421248 pinger.slac.stanford.edu EDU North_America 196www.21dut.45ac.139za ZA Africa EDU.SLAC.STANFORD.PINGER ZA.DUT.AC.N1 MUSEUMSNC.CO ?r 306305.191339 306305.324407 306305.287384 306305.328513 306305.377397 306305.398504 306305.441418 306305.591434 306305.860378 306305.605498 306304.572907 306304.618774 306304.578900 306305.474073 306305.455491 306305.428404 306305.346437 306305.378478 306305.491808 306305.318546 306311.284584 306305.395420 306305.262553 306305.248436 pinger.slac.stanford.edu EDU North_America www.dutmuseumsnc.acco.za ZA Africa EDU.SLAC.STANFORD.PINGER ZA.RU.MUSEUMSNC.COAC.N1 ?r 305306.339200 305306.407242 305306.384202 305306.513153 305306.397186 305306.504186 305306.418246 305306.434178 305306.378193 305306.498206 304306.907217 304306.774114 304306.900129 305306.073057 305306.491227 305306.404228 305306.437166 305306.478149 305306.808203 305306.546129 311306.584131 305306.420161 305306.553118 305306.436243 pinger.slac.stanford.edu EDU North_America www.museumsncru.coac.za ZA Africa EDU.SLAC.STANFORD.PINGER ZA.RUSAGRID.AC.N1 ?r 306294.200901 306294.242915 306294.202805 306294.153903 306294.186892 306294.186889 306294.246856 306294.178905 306294.193873 306294.206897 306.217606 306.114592 306.129546 306.057530 306.227675 306.228643 306.166603 306.149616 306.203597 306.129578 306.131555 306.161573 306.118613 306.243609 pinger.slac.stanford.edu EDU North_America www.rusagrid.ac.za ZA Africa EDU.SLAC.STANFORD.PINGER ZA.SAGRIDTECHCONCEPTS.ACCO.N1 ?r 294.901 294.915 294.805 294.903 294.892 294.889 294.856 294.905 294.873 294.897 306.606 306.592 306.546 306.530 306.675 306.643 306.603 306.616 306.597 306.578 306.555 306.573 306.613 306.609 pinger.slac.stanford.edu EDU. North_America sagrid.ac.za . . ZA Africa. EDU.SLAC.STANFORD.PINGER ZA.TECHCONCEPTS.CO.N1 ?r . . . . . . . . . . . . . pinger.slac.stanford.edu EDU North_America speedtest.techconcepts.co.za ZA .Africa EDU.SLAC.STANFORD.PINGER ZA.TENET.AC.N1 . ?M 280.581 280.644 280.561 280.593 280.590 280.626 280.597 280.531 280.614 301.662 301.652 301.571 301.545 301.668 301.701 301.725 301.650 301.724 301.577 301.644 301.540 301.622 301.704 301.707 pinger.slac.stanford.edu EDU North_America speedtestbrunsvigia.techconceptstenet.co.zaac.za ZA Africa EDU.SLAC.STANFORD.PINGER ZAZW.TENETACROSSAFRICATOURS.ACCO.N1 N2 ?M?r 280.581 280.644 280.561 280.593 280.590 280.626 280.597 280.531 280.614 301.662 301.652 301.571 301.545 301.668 301.701 301.725 301.650 301.724 301.577 301.644 301.540 301.622 301.704 301.707 pinger.slac.stanford.edu . EDU . North_America brunsvigia.tenet.ac.za . ZA . Africa EDU.SLAC.STANFORD.PINGER ZW.ACROSSAFRICATOURS.CO.N2 ?r. . . . . . . . . . . . . . pinger.slac.stanford.edu EDU North_America www.acrossafricatours.co.zw ZW . Africa EDU.SLAC.STANFORD.PINGER ZW.HELLENIC.AC.N1 . ?B 309.769 309.585 309.702 309.621 309.666 309.611 309.852 309.847 309.936 309.951 309.736 309.811 310.127 309.780 309.897 309.704 309.912 309.779 309.759 309.742 309.720 309.514 309.610 309.729 pinger.slac.stanford.edu EDU North_America www.acrossafricatourshellenic.coac.zw ZW Africa EDU.SLAC.STANFORD.PINGER ZW.HELLENICPAYNET.ACCO.N1 ?Br 309324.769584 309324.585776 309324.702691 309325.621179 309324.666917 309324.611998 309325.852087 309325.847175 309324.936887 309325.951771 309325.736117 309325.811435 310325.127500 309324.780762 309325.897113 309325.704411 309325.912560 309325.779380 309325.759045 309324.742755 309324.720942 309325.514346 309324.610855 309325.729750 pinger.slac.stanford.edu EDU North_America www.hellenicpaynet.acco.zw ZW Africa EDU.SLAC.STANFORD.PINGER ZW.PAYNET.CO.N1Monitoring-Site Remote-Site ?r 324.5840 324.776 324.691 325.179 324.9171 324.998 325.087 325.175 324.8872 325.771 325.117 325.435 325.5003 324.762 325.113 325.411 325.5604 325.380 325.045 324.755 324.9425 325.346 324.855 325.750 pinger.slac.stanford.edu6 EDU North_America7 www.paynet.co.zw 8 ZW9 Africa 10 Monitoring-Site 11 Remote-Site ? 012 1 2 13 3 4 14 5 6 715 8 9 16 10 11 17 12 13 1418 15 16 19 17 18 20 19 20 21 22 23 Monitoring-Node Mon-TLD Mon-Region Remote-Node Rem-TLD Rem-Region
...
Summary for Sites in S.AFRICA seen from EDU.SLAC.STANFORD.PINGER
Traceroute
The route measured 19:00 hrs 1/28/2020 PST from SLAC to South Africa goes East across the US via Chicago, Washinton to London and thence S. Africa:
...