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Snapshot Mar

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20, 6pm California time

There are some notable changes in some of the Round Trip Times (RTT)  for the:

• The Odessa I. I. Michnikov National University a step up starting Feb 27, starting around 14:00 GMT, and then a larger step down on Feb 28 around 20:00 GMT. 
  Then again on Mar 2, 2022 there is a marked increase in RTT between 16:00 and 20:30.
• The Western Ukrainian National University, which is farthest from the invading forces, saw a step up starting around 9:00am GMT Feb 25, 2020, then steps down on Feb 28 around noon and 20:00 GMT. Then on Mar 2 16:30-20:00 there is a burst of increased RTTs.
• There are a couple of bursts of increased RTTs seen from SLAC to Kyiv Academic University on Feb 28, 2022 11:00-12:00 and again on Mar 2, 17:00 - 18:30GMT.
• There is a step increase in RTTs seen from DESY, Hamburg Germany to the Kharkov Institute of Physics and Technology starting 18:00  March 2, 2022 GMT.
• The Simon Kuznets Kharkiv National University of Economic, Kharkiv saw a step increase in RTT of about 8ms around 10:0am Mar 3, 2022 GMT
• The Vinnytsia National Technical University saw an RTT step upward of about 3 ms around 16:30 Mar 3, 2022 GMT.
• We have been monitoring the  Kharkiv Institute of Physics and Technology since 2004. It was no longer pingable from SLAC by name mail.kipt.kharkov.ua or address 193.239.180.1 after 13:15 Mar 3, 2022 GMT (5:15 am Mar 3, 2022) and returned around 7:30am Mar 4  GMT. Also the web page  https://mail.kipt.kharkov.ua/  no longer responded during this period. 
  Also the RTT from SLAC to this host noticed a step increase of almost 5msec around 2100 hours GMT followed by another step increase.
  No response was seen from pings starting around 19:00 3/10/2022 GMT. Also the name mail.kipt.kharkov.ua did not resolve to an address. Then it responded by address (but the name did not resolve) again around 15:30 3/16/2022 GMT, also, the web site did not respond. By 1:02pm 3/17/2022 (California time) the web page was again responding and the name service was working for mail.kipt.kharkov.ua giving the same address (193.239.180.1) as before the outage.
  The effects are more marked in the ping measurements from DESY, Hamburg, Germany since it is much closer than SLAC to the Ukraine.  Comparing the minimum RTT of (~44ms )prior to Mar 1st with that (~33ms) after 18:00 on Mar 19, the 11ms change is roughly equivalent to the round trip time in fiber between Hamburg and Kharkiv indicating that the host responding to pings from DESY has been moved from Kharkiv to Hamburgthere is a 11ms change.
  This is confirmed looking at the RTTs between SLAC and mail.kipt.kharkov.ua and comparing the minimum RTTs prior to Mar 1st (~190ms) with those after Mar 16 (~180ms) indicating a drop of ~10ms.
• The National University of Shipbuilding, Mykolaiv (www.nuos-intyernational.com.ua) saw no responses after 21:07 Mar 5 and before 02:37 Mar 6 when it started to respond again.
• The Chernihiv National University of Technology saw a step increase of 20ms plus some instability and losses after Mar 8 07:07 and until just before Mar 8 16:37. The host was no longer pingable from GMT 14:30 Mar 11, 2022 onwards. Also, the website no longer responded. It again started responding from GMT 09:30 Mar 16, 2022 onwards.
• The Lviv State University of Physical Culture, also saw a similar step increase of 20ms plus some instability and losses after Mar 8 07:07 and until just before Mar 8 16:37.
• The https://www.hostmaster.ua web site originally in Kyiv moved to California as www.hostmaster.ua.cdn.cloudflare.net (104.18.24.87) sometime after Mar 9 and before Mar 15. The host hostmaster.ua (193.29.222.26) remained in Kyiv. Also according to https://hostmaster.ua/news/?pr20220226 'As of 2/.26/2022 the .UA domain registry company "Hostmeister" has transferred to European countries servers that ensure the operability of the .UA domain. Previously, the servers were located in Kiev.'
• PingER has been monitoring ns.kiev.ua since the year 2000. Up until March 4th, 2022 the daily inter-packet-delay-variation or jitter (see https://www.slac.stanford.edu/comp/net/wan-mon/tutorial.html) of the ping RTT was consistently below 0.7ms. Since then it has climbed to over 7ms.

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¹ According to https://ipgeolocation.io/ip-location/www.luguniv.edu.ua it is in Strasbourg France

Number of Ukrainian hosts monitored from SLAC by day

As the war progressed we added more Ukrainian hosts to the list of monitored sites, and lost a few.

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Map of monitored sites

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Monitored from SLAC

Monitored from DESY

www.luguniv.edu.ua¹ (Taras Shevchenko National University, Luhansk, latitude longitude 49.28157 38.90258)

Note its low value of RTT.

www.dnmu.com.ua (Donetsk National Medical University,  Donetsk, latitude longitude 48.0027 37.8278)

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