What is being done? Network switches are having the latest software installed, to improve resilience and performance.
When is it being done? The change window is 22:00 on Saturday, 15th November 2025 until 06:00 on 17th November 2025. Software updates are being installed on the switches between the hours of 22:00 and 05:00 each night.
Who will this affect? The software update is being applied to all network ‘Spine’ and ‘Leaf’ switches, so the university’s wired and wireless networks should be considered ‘at risk’ overnight during the change period.
How will this affect service users? Most of the network is resilient; therefore, users should not notice any network outages. There are however a small number of locations where the network will be offline at some point during the change window. The following locations will experience a network loss for up to 20 minutes between the hours of 22:00 and 05:00 during one of the days.
Cathays / Newport Road Sites Sbarc/Spark (External customer networks) University Hall Central Square
Heath Park Sites Allensbank Road Residences DENTL Medicentre Neuadd Meirionnydd Sir Geraint Evans building Tenovus Building Ty Dewi Sant building University Hospital – Tower blocks 1 & 2 and Glamorgan House
Why is it being done? This is emergency maintenance to mitigate a recently announced security vulnerability.