I will be rebooting the host computers and some of the guests to load new kernels tonight at approximately 10PM. Hopefully it will go smoothly like last time and result in only minimal downtime (about 10 minutes per machine).
Also, one of the two radius servers is currently down and will be restored at that time. This should not impact service as radius is duplicated and the machine that is down is the secondary, just some loss of redundancy until it is restored.