Not quite sure what you mean by an “out of range IP address”; do you mean a self-assigned 169.x.x.x address? That happens when the DHCP client (like the Rossini) is connected to a working Ethernet port but is unable to contact a DHCP server. In which case you should check the Rossini’s connectivity to the DHCP server in your network.
If you mean just a random IP address within your DHCP Server’s range; the allocation of an IP address to is determined by the DHCP Server, not the client (Rossini). Most often, the DHCP server would re-allocate the same IP address it has previously allocated to a specific client based on its Ethernet MAC address. So resetting the Rossini is not going to help.
Personally, I would recommend turning DHCP off on the Rossini; Just point any Web browser to your Rossini’s IP address and change it’s network setting manually to a fixed IP address/gateway/DNS.