I am trying to keep the DHCP Server from issuing an IP that is already in use, but was not issued by the server.
I have a DHCP server setup to issue IP addresses from a pool.
I have some field techs who think they are real wise guys setting things with a static IP, the same one the DHCP issued them originally. I mistakenly thought that the DHCP server knew what IPs were on the ARP list and, thus, didn't issue any IP conflicts automatically.
I can see that is NOT the case. After they set a device static to an IP of 10.81.0.184, the DHCP server issued that same IP to another device. I can see that the DHCP server only knows which addresses it has issued, and are added to the IP Pool Used Addresses at the time it is issued by the DHCP Server. A device set static occupying that IP pool won't appear on this list.
Additionally, there is no option to add an IP to the list of used addresses. Because there is a few addresses used statically, I would like to know a way to reserve those IPs or remove them from the available pool, without revising my IP pools. Otherwise an IP conflict keeps happening.
I want to go around and set these devices to DHCP, but in the meantime, how I keep the conflicts from happening?
Does anyone know a way to accomplish this?