News Detail

Maintenance work TUnet backbone Gusshaus campus

The replacement of the Gusshaus backbone router will take place during a maintenance window on Tuesday May 25, 2021 between 8:00 am and 4:00 pm. During this time all TUnet services in this campus area will be interrupted for up to 10 minutes.

Update 3:30 pm: The upgrade was completed successfully. The switchover to the new routers happened at around 10:00 am; most buildings regained their connectivity very quickly. The connectivity to one building was unavailable until 10:12 am; we apologise for the delay. Full redundancy was reached at 12:05 pm.

The TUnet campus enterprise network infrastructure is continually adapted to the needs of TU Wien. Currently, the implementation of a modern 100 Gigabit Ethernet infrastructure is underway to fulfil future requirements of the ever progressing digitalization process.

After the successful upgrade of the core routers and the backbone routers for the campus locations Getreidemarkt, Karlsplatz, Science Center, Atominstitut and Freihaus, this upgrade will be performed for the Gusshaus campus. Affected buildings are Neues EI (CA, CB, CC, CD, CE), Altes EI (CF, CG), the Nano Center (CH), Makartvilla (CI) and Aspanggründe (MG, MH), but not the Erzherzog-Johann-Platz 1/Gusshausstraße 28 buildings (FA, FB, FC). The replacement will take place during a maintenance window on Tuesday 25 May 2021 (Tuesday after Pentecost) between 8:00 am and 4:00 pm. During this time, you will experience interruptions for up to 10 minutes of TUnet services such as Internet access via the wired network for servers and desktops, as well as WiFi and TUphone. This includes GUT access control systems and surveillance cameras. The communication between Gusshaus desktops and the CAU156 server housing area will also be briefly interrupted. datacenter services as well as server housing areas in CAU156 that are connected to other backbone routers than Gusshaus are not affected.

We aim to keep the interruptions as short as possible and thank you for your understanding.

After the upgrade is completed, the Campus Gusshaus will be highly available, connected via four 100 gigabit links towards the TUnet Core and ready to fulfil future performance and switching capacity demands.

There is no need for config changes on your system. If you suspect a problem after our maintenance work has been completed, please check the network settings of your system or contact the IT contact person at your institute first. Also check the TUnet status, opens an external URL in a new window and currently listed messages on the homepage, opens an external URL in a new window. Should this neither solve nor explain the issue, send an email to or contact us at 58801-42002.