Hey @ReneStoffels,   Keep in mind that DHCP is normally requested by the client and an ordinary change will not necessarily prompt the clients to refresh their IP address on the new subnet. If you just change it from the 192.X subnet to the 10.X one, you might end up with a lot of clients with incorrect IP addressing which will not have network access until the lease expires.    @PhilipDAth 's method will go a long way in helping refreshing everything, especially if powered via PoE. I know Windows client tend to be a bit stubborn and might retain the address even by doing this.   An alternative method might be to reduce the lease time down to the minimum, wait 24 hours for all the devices to get the new lease time and then make the changes, so within a few minutes everything should get the new address.   Hope this helps!   Giacomo ... View more