We are a small k-12 school with about 150 school devices plus personal staff devices. Students are not allowed on the network.
I have filters activated on the windows 2012 r2 standard server and need to approve and enter the mac address of permitted devices to receive an address from the DHCP server.
Today the network was slow and a ping test showed 18% lost packets. I connected to our dd-wrt router and found a few computers using more bandwidth than they should.
On the router I can see the IP and the mac address of the devices. The ip address was on handed out by the DHCP server.
Yet when I went to the server >>DHCP>>Address leases, there were several addresses that I could see on the router but I could not see on the leases for the DHCP server.
I did find them using the mac address on the filter list, so they were approved to receive an address, but I could not specifically see them on the lease list.
I thought perhaps I had a second device handing out addresses, but DHCP function is disabled or not installed on the router and other servers. Therefore I do not believe another device was handing out addresses.
Question: Is it possible to have an incomplete IP address list in the lease section of DHCP?