Looking at bgplay data, Hetzner possibly had some outages at the time? Cogent isn't quick at withdrawing routes and will often blackhole inside their network, but i can't see a large leak/hijack as happened.
On Tue, May 23, 2017 at 10:32 AM, <valdis.kletni...@vt.edu> wrote: > On Tue, 23 May 2017 10:10:25 +0300, Scott Christopher said: > > https://www.lowendtalk.com/discussion/114865/hetzner-and- > other-traffic-passin > g-cogent-rerouted-over-moscow#latest > > > > A report that all Cogent traffic got re-routed into Moscow. Looks > > innocent but happened right after UA blocked RU websites (e.g., > > VKontakte, Yandex, etc) > > > > Any thoughts ? > > Similar happened like 3 weeks ago. Big collective yawn when I posted > about it. >