DHCP not handing out spare leases
This is a fairly urgent problem so i'm hoping I can get some helpful tips here.
Our network uses Win2k3 DHCP & DNS (both on the same server). The network configuration is 172.18.0.0/22 (Subnet of 255.255.252.0).
We have DHCP set to hand out leases in the scope 172.18.1.10-172.18.2.250
Except when the lease's hit 172.18.1.254, it wont hand any new ones out and hand's out old ones. Meaning when the machine it did belong to connects, we get IP conflicts.
I've checked everything I can think of but cant find anything wrong DHCP wise... it sucks cause everything is coming to a halt!!!
We're only just having the problem now because we've started to add new machines to the network (bringing the total above the 172.18.1.x number available).
Weirdest thing is, DHCP says that it's got ~ 50% free leases... so why isnt it handing any out in the 2.x range?!
I'm thinking about altering the subnet to 255.255.0.0 to see if it resolves it... but obviously thats alot of work. Help please!!!