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PingER monitors two hosts in Hubei: www.hbmy.edu.cn at Hubei University for Nationalities and Hubei University of Automotive Technology and www.huat.edu.cn at the Hubei University of Automotive Technology. The locations of the two Universities is shown below.
The hourly measurements for www.hbmy.edu.cn and www.huat.edu.cn are shown below (one can use the form https://www.slac.stanford.edu/cgi-bin/ping_data_plot.pl to create such a plot).
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In general there are marked diurnal changes. There is a slight increase in RTTs following the Chinese New Year January 25th 2020. Then there is a small step reduction in RTTs March 10, 2020, followed by an increase in the packet losses starting March 18th 2020.
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If we look at the daily aggregates for the packet loss per cent, average RTT and Inter Packet Delay Variation www.hbmy.edu.cn and www.hbuathuat.edu.cn from 3/23/2019 thru 3/21/2020 and then expand to see the subset from 1/1/2020 thru 3/21/2020 we get the plots below.
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Note that www.
It is clear that there are huge variations in the measurements over the last year. Looking at just 2020 data there does appear to be evidence for an almost factor of 2 change in the IPDVs towards the end of January, in opposite directions for the two hosts. N.b we might expect to see something following the January 23rd lockdown of the Wuhan region. There is a "flutter" in the IPDV around that time, whether it is related to the shutdown is unclear.
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