DHCP Server claims incorrectly that there are only a few more addresses to give. DNS Zone has multiple pc names to 1 IP address.
Posted on 2004-10-20
Not sure if the 2 issues are related. I am running a w2k domain with one DC hosting everything ie DNS DHCP etc. Recently the scope was changed from *.*.*.30 - *.*.*.190 to *.*.*.60- *.*.*.190.
I noticed a warning icon on the DHCP scope and the statistics showed that there were only 4 ip addresses free. When I checked the leases there should have been at least 40 free. I found an article that said that the addresses may not show as free for up to 4 hours even after they are. I waited 1 day but the problem was still there. I stopped and started the dhcp server - reconciled the scope but problem was the same. Eventually I added another 10 addresses to the scope and the warning went away. Why is this happening and why does it not see the other addresses. The other thing that may be relevant here is that the DHCP server stopped issuing addresses at *.150 and issuing vthem again at 180 . The last addess was 186 and the scope ends at 190 -hence 4 free but what about all the other ones it never issued? I have no reservations setup.
I noticed that my DNS Server has several entries that refer to different computers that have the same ip address! Not sure if this is related to the above problem or why. It would appear that these are machine sthat once got given dhcp addresses but are not currently on the network and the DNS did not delete them.
Many thanks for any help