UPDATE
1. HW upgrade with associated downtime is planned for 14:00 CET-14:30 CET 24.03.2018(today). And you are safe to mine until then
Do you have an estimated downtime duration ? How many hours do you think it will take ? Also be careful about DNS updates if you change the IP, to update DNS records to 30min TTL a few hours before updating the ip.
Thanks.