I have a windows server 2003 machine running virtual server 2005. It has several virtual machines on it and they had been responding fine for years now. All of sudden, with no apparent reason I know of, some have stopped answer to the machine name. They answer fine to the ip.
For example, when connecting with Remote desktop, I have used "sql2005vs2008 /admin" to connect to the console session for years. Now it doesn't connect. However, if I use "192.168.0.50 /admin" I can connect with no problem.
To muddy the waters, I have other machines on the same host that still answer to their machine name.
I have rebooted my firewall / dhcp server several times as well as the vm's. The host has been rebooted as well. Any other ideas?