Need advice for merging 2 small lans

[Duroth]

Hey guys

Currently i have the following configuration: http://imgur.com/6gQLxML

For location A: there is one ethernet cable coming from the ISP. I have 2 broadband contracts, both come with 1 public IP (static). For each public IP i have one router(ASUS RT-AC66U, running ASUSWRT Merlin), with WLAN configured with the public IP and LAN with different private subnets (one is 192.168.1.255, the other is 192.168.2.255). Between the routers and the ISP there's a bare bones switch (they were too lazy to give me 2 wires). I want to merge the 2 sublans for local usage(99% being file transfer), but keep the split for internet usage.

Ultimately i also want to merge the networks in location A with the one in location B, but that's not an issue at this moment.

Is there any solution to do this? I can replace the switch with another router if needed.

 

[ColinTaylor]

with WLAN configured with the public IP

I guess that's a typo and you mean WAN?

This might work:

Try setting up a static route on each of the routers at location A. Router 1 needs a route to network 192.168.2.0 via 192.168.2.1 on the WAN interface. Router 2 needs a route to network 192.168.1.0 via 192.168.1.1 also on the WAN interface.