We're running a reasonable sized network and provide subnets for different areas (ie, Floor 1 might get 172.16.41.0/24, floor 2 gets 172.16.42.0/24 etc). We have a 2 DHCP servers assigning addresses (1 per campus).
The problem we're having is that when you connect a new computer up it will work fine but when moving a computer from one subnet to another (Floor 1 to Floor 2), it won't assign a new IP correctly without manually deleting the old entry the server.
I'm not 100% sure if it's happening on all subnets, but it's definitely been a problem on subnets with our new HP Procurve switches.
Anyone got any ideas what the cause might be or a way to fix it?