Hello!
I would like to connect two separate buildings with two WANs - to be able to see anything on both networks.

Currently, I have one network across two buildings. My setup looks like this:

I want to have another Internet WAN connection in building 2 also - (for reliability and more bandwidth, same ISP).

I would like to use my current fiber-optic cable between sites. It would be problematic to have another or different one between them.

Of course, I'll need another router, but I don't know how to configure the whole thing. Is it even possible?

 I thought about:

- connecting two switches (same connection as now - fiber optic cable with SFP),

- setting two different networks (it could be even one network but I don't think it's possible),

- maybe connecting two routers instead of switches? (with two MC220L converters on each side).

I can't find any articles about this problem. I would appreciate any information.