I have a netvanta 4305, the DHCP range is set to 192.168.0.2 to141.
The ip address that is showing up on the computers is 192.168.30.xxx. The computers are mostly win7 with a couple of macs and win10.
I have had some computers claim a duplicate ip address even though the router shows no conflict.
any insights would be great
It sounds like there is a rogue DHCP server on the LAN. Is there a switch behind the device? Does the 192.168.30.x network exist at the site?