Ooer...what happened here?

[#1]

Anyone got any ideas what could have caused these three huge blocks of red?   I don't remember anything happening at 10pm so it was probably of short duration.
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- Curious Dave

[#2]

Most likely a blip in the monitoring to be honest - for some reason the pings weren't available. As the graphs look normal either side of the red lines this is the most likely explanation - if they were caused by connection issues you'd be seeing a lot more interference on the graph either side of those.