Within the last few days, I have been running out of addresses on my DHCP server.
We have a small school network running on Server 2003. I have had a pool of addresses available for DHCP assignment: 10.0.0.100 - 10.0.0.254. The addresses below that are reserved for static IP addresses. Just this week, I have been running out of IP addresses several times a day. I have expanded the pool to start at 10.0.0.80 but within a day, those addresses were taken. I shortened the lease time to 3 days - hoping to free up unused addresses but that does not seem to work.
I do not have a secondary DHCP server set up.
Any suggestions why this could suddenly be happening and suggestions for fixing it?