What would cause a DHCP server to stop handing out IP addresses to a subnet? We have a single DHCP server that handles two different subnets - 1 & 2, that are on different VLANS on our network. After working for several months, clients that originally have an IP leased from "subnet 1", began having trouble getting an IP assigned automatically from "subnet 2" - they just sit dormant, retaining the bad IP from the other "subnet 1". To our knowledge, nothing has changed on the network - although something MUST have changed, somehow. Again - this had been working fine for some time...and then stopped. Any suggestions is much appreciated.
Update: I checked the DHCP server log, and I can see it is handing out IP's for subnet 1 to client requests coming from subnet 2. This is the problem, but I do not know why its doing this.