This message has been sent to notify you of a planned network maintenance that will occur on :
Sunday, March 1st 2020 at 21:00 CST
This maintenance is expected to last between 45 and 60 minutes. This maintenance will cause a total interruption of the network for all services at our Kansas City location. A small number of services may need to be gracefully power cycled as the maintenance progresses.
Our datacenter's manager has recently identified a problem with most of our cabinets where all top-of-rack switches were incorrectly mounted by the on-site technicians. All affected top-of-rack switches are mounted on the incorrect side of the cabinets. They intake hot air from the hot aisle and exhaust it in the cold aisle. This results in an elevation of the temperature in the cold aisles and, in some cases, adjacent servers may indirectly intake air from a hot aisle. All HP servers are designed to shutdown if an abnormally hot ambient temperature is sensed. This temperature threshold coincides with the temperature of the hot aisles. There is therefor a significant risk to the stability of all services, especially those in close proximity to network equipment and increasingly so as the outdoor temperature increases.
To ensure the stability of all services, the datacenter management will schedule a number of planed maintenances that will aim at correctly repositioning all affected network equipment.
The goal of this first maintenance is to reposition the distribution switch connecting all network equipment at our Kansas City location. More specifically, technicians will disconnect all fibers attached the switch, unmount it from the cabinet and then re-mount it in the opposite side of the cabinet and reconnect all fibers. It unfortunately will be impossible to maintain the fibers attached to the switch as it is being moved, but the technicians will attempt to maintain it powered on at all time, in order to avoid a lengthy reboot of the switch.
To ensure that any downtime is minimized both in duration and density, the technicians will work as quickly as possible and several days will be allowed between each switch repositioned. Customers can expect up to 2 of these maintenances per service (this maintenance to reposition the distribution switch and a second, upcoming maintenance to reposition the switch immediately connecting their service (this second maintenance will be later announced)).
All new network equipment is being correctly positioned to prevent this problem from reoccurring.
We apologize for the inconvenience that this planned maintenance causes you.
Please let us know if you have any question or concern regarding this planned maintenance.
Thank you for your understanding,