Changes to this message: Update Dear users of the Linux Cluster, we are currently experiencing network connectivity problems on the MPP1 segment of the Linux Cluster. This also affects the Linux Cluster login nodes lxlogin1 and lxlogin2. We will try to resume operation as soon as possible and we will keep you informed via this announcement. Update (2013-05-13, 19:30 CEST): Investigations to isolate the root cause of the problem are still ongoing. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4584/ Axel Auweter