This is getting odd.
I have 2 DHCP servers in my single domain (for fault tolerance) ... MASTER and SLAVE. I want to total disable MASTER, reformat the computer etc ...
So, I expanded the SLAVE scope and configed all the clients - they are all happily picking up IP's from SLAVE.
I 'disable' the SCOPE on MASTER .. cool.
So, I ADD/REMOVE programs and remove DHCP from MASTER ... within the next hour or so, SLAVE is no longer Authorised ! I cannot Authorise the DHCP server (errors in event log) ... so I reinstall DHCP on MASTER and authorise it again (no scope is set up) ... I can now reauthorise SLAVE and it runs ok
So, SLAVE seems to be totally dependant on MASTER being a DHCP server ... even if there is no scope on MASTER.
How weird is that ?