The report I have received from the UIS about today’s wireless outage is slightly inconclusive. It seems that there was a malfunction of the central controller that looks after our access points, causing them to reboot and go into a default unconfigured state. They were initially rescued by moving them to another controller, but have now been put back as they should be without further problems.
The incident happened shortly (but not immediately) after a minor configuration change to provide optimal connectivity for the new access points in the lecture theatres. This change was reversed, but this did not help, and it has subsequently been done again without triggering the fault. There is therefore no evidence that the incident was caused by the configuration change.
The UIS have reported the incident to their Aruba support partner.