Network performance issues have been reported in our data center DCD Doetinchem, we are investigating it now and we will update this post with new information.
During the investigations we have extensively checked our network and traced back the origin of the problem. In this case this meant the issue only meant part of our network (equipment) was not replying to ICMP ECHO packets.
The issue has been resolved and the network is operating normally again, we will closely monitor the situation in order to prevent repetitions of this issue.