For reasons not worth going into, my home network consists of two subnets, and I would like to specify a fixed IP and gateway for my tablo rather than relying on DHCP,
Pretty sure the only way is DHCP, though you can of course put a reservation in for it so it always gets the same IP (takes it out of the general pool).
Very long and sometimes contradictory post on workarounds in lieu of static IP address
(No, I’m not able to change that disturbing image! I wish people would be more considerate of their avatar images.)