Maintenance: urgent security updates on the DHCP servers

Message-Id: 202105311736
Time: 1st of June 2021, 7.30 to 8 am
Affected: DHCP-Cluster, entire WLAN/eduroam and University
Impact: 1min long no new DHCP leases resp. new network connectivity


Due to critical security vulnerabilities our DHCP servers have to be
have to be updated at short notice and outside the maintenance window.
be updated. As the server is a cluster of 2 systems, only a short ‘hiccup’ is
to be expected when switching.