I ran into this routing configuration and not understand how it is working, can some expert explain?
Network A: 192.168.0.0/24
Network B: 192.168.1.0/24
Two networks have their own DSL A & B on the WAN port. LAN side connecting to a shared switch. Theoritically speaking, the two networks cannot communicate with each other logically without a secondary IP configured on the FB and additional static route. For example, FB-A, I might need to add additional IP 192.168.1.2 to the LAN port or Opt port, and FB-B, I might need to add additional IP 192.168.0.2 to the LAN port or Opt port in order for both networks to see each other.
Question 1: In this case do I still need to create a static route? For example on FB-A, am I supposed to add 192.168.1.0/24 192.168.1.2?
Question 2: Somehow without adding additional IP address on the LAN nor Opt port, example, FB-A has only one IP address 192.168.0.1, we have a static route 192.168.1.0/24 192.168.0.1. By adding this static route entry and similar entry on FB-B (192.168.0.0/24 192.168.1.1), we are able to communicate across each other.... Can some expert please explain what am I missing here? Why are they working???
Thanks in advance