12-ports on one of the switches in the cluster stopped working at 02:00 this night, so we lost connection to 12 of the nodes for ~7 hours.

Affected nodes:

compute-0-18 compute-0-16 compute-0-11 compute-0-8 compute-0-7 compute-0-6 compute-0-5 compute-0-4 compute-0-3 compute-0-2 compute-0-1 compute-0-0

To resolve the problem, the failing switch had to be rebooted. This lead to a short (~30s) failure/unmount of the /work* and /home/fimm filesystems on all nodes. Uncertain how this affected running jobs. Most seems to have handled it without problems...