As I mentioned yesterday, I setup a secondary domain controller. In my /etc/krb5.conf on all my test AD clients, I specify the IP of both kdcs: [realms] ?AD.EECS.YORKU.CA = { ? kdc = IP1 ? kdc = IP2 ?} If I'm logged into a system using the DC at IP1, and I stop the DC processes on IP1, then I try to run a command such as "whoami" on the AD client, I get "whoami: cannot find name for user ID X". If I try to ssh to the system, my password doesn't work. If I then put back up the DC processes on IP1, everything works. What am I missing? Isn't the point of the alternate domain controller that I should be able to take one away, and the other would be used? Jason.