Dual IP Addresses on the Same Segment?

Anyone have experience with this strategy? I have 2 non-contiguous class C addresses, it’s been suggested that I use both on the same physical network segment, with a 2-NIC router attached as well. Each NIC will need its own unique address from one of the Class C addresses – and the routing function would allow the two networks talk to each other. I’d have never thought of this – and wonder just how commonly used this idea is.

Thanks,

MaryL