Hi there!
DS2246 is either a disk shelf, or a chassis name - If there are ONLY 4 x ethernet ports and 4 x rectangle ports (or two lots of 2 x ethernet and 2 x rectangle) on the back of the unit, with parts labelled "IOM 6", it is a disk shelf and requires a SAS HBA and cables to connect to a server to use. There is no configuration on the unit itself.
The other option is that it is a DS2246 with a controller in it, however based on your DHCP error, it is probably the first one.
In either case however, this is outside the scope of what we can assist with here. Have a look on reddit at /r/netapp or /r/homelab
Thanks!