Multiple LAN interfaces on subnet with different IPs
I have an old TZ205 being retired. The subnet is 10.2.2.x and the TZ205 is 10.2.2.1 This TZ205 is being replaced by a NSA3650 as part of a larger project. One interface on the NSA3650 is already set as 10.2.2.2, and has taken over DHCP for the subnet, pointing at itself 10.2.2.2 as the default gateway.
There are devices (non-PC) scattered through the 2mm SqFt building with static IPs on 10.2.2.x pointed at gateway 10.2.2.1. These will all be removed over the next ten months, but that's a long time. I'd like to use an additional interface on the NSA3650 and assign it 10.2.2.1. That would allow me to remove the TZ205, route everything through the NSA3650, and when there is no traffic going to 10.2.2.1, I can eliminate that interface.
Can this be done?