On Monday 05-15-2017 from 21:30 - 22:00 CEST (19:30 - 20:00 GMT) we will reconfigure our IPv6 infrastructure. This will have a short impact on all running IPv6 connection and there will be a short interruption. Afterall our IPv6 will be up again with new IPv6 addresses over all systems.
After the maintenacnes we will report here if everything is done.
Sorry for any inconveniences.