The client has two networks that are located close to each other, and they want to be able to connect and share network resources. Rather than creating a VPN tunnel between the LANs, it would be more beneficial to connect the two networks directly to improve performance. Additionally, a failover setup can be added to redirect traffic to the failover WAN in case one of the ISPs becomes unavailable.

The image portrays two routers connected to separate ISPs and their respective local area networks. In order to enable the sharing of resources such as WAN failover and communication between the local networks, it is necessary to establish a common subnet between the LAN2 of both routers, with the IP address format 10.10.10.0/24.

In case Optus is not available, local network traffic will be routed to Telstra for internet connectivity. The diagram illustrates this.

If Telstra is unavailable, local network traffic will be redirected to Optus for internet access, as shown in the diagram.

Router 1 (R1) Configuration

Activate LAN2 and allocate it to P4 (Port 4).

The LAN 2 has been assigned the IP address 10.10.10.2 with a subnet mask of 24 and disabled the DHCP Server.

Enable Inter-LAN Routing to allow traffic to pass between LAN1 and LAN2.

Create a static route for 192.168.1.1/24 to allow communication with 192.168.50.0/24 belonging to R2.

Create a routing policy that automatically switches to LAN2 in case WAN2 becomes unavailable.

Router 2 (R2) Configuration

Enable LAN2 and allocate it to P4 (Port 4).

The IP address 10.10.10.1 has been assigned a subnet mask of 24, and the DHCP Server has been disabled.

Enable Inter-LAN Routing to allow LAN1 and LAN2 to exchange traffic.

To enable communication between 192.168.50.1/24 and 192.168.1.0/24 belonging to R1, it is necessary to create a static router.

Create a routing policy that enables failover to LAN2 in case WAN2 becomes unavailable.

In order to establish WAN Connection Detection using Ping Detect, it is crucial to configure WAN2 for both routers.

This will enable the router to detect any absence of an internet connection, even if the WAN port is active on layer 2.

By Edward Eroy