I have an ISP billing system installed on Debian GNU/Linux 8, which has 3 NIC cards. The Server is connected to 3 Mikrotik routers. Each router is connected to different internet lines which means they have 3 different static public IP subnets.
Currently the server is connected to router1
220.127.116.11/24 directly via eth0. the other two routers are reachable via the internet, but we have issue reaching them sometimes due to internet outage.
This is the current network diagram:
I have configured
eth2 and connected directly to the router2 and router3 respectivly using the following answers/guides:
I have configured them exactly according to the above links but I was not successful yet. All the 3 networks stopped communicating, even router1. I have been forced to rollback.
What I would like to achieve is connecting all three routers directly to the Server so that they can communicate locally.