Okay guys, thanks. I've set the subnet mask to 255.255.255.0, and DHCP leases 16 to 150 (just to be safe). But now a bunch of the computers on the network can't get on the network. They're complaining about IP address conflicts. I've rebooted these computers, power cycles the router and all attached switches, but they're still giving me the problem. I've tried releasing and renewing the IP addresses, but that can't even get going...