Enable communication between two private networks by configuring a static route

In CubeCOS, a static route is a manually defined routing rule used to direct traffic from one network to another through a specified next-hop IP address.

The network topology

The sample network topology includes two distinct subnets:

1. Subnet 10
   1. Subnet address: 192.168.10.0/24
   2. Subnet router: pri_10_to_pvd
   3. Subnet gateway (IP of external network): 172.16.3.201
2. Subnet 20
   1. Subnet address: 192.168.20.0/24
   2. Subnet router: pri_20_to_pvd
   3. Subnet gateway (IP of external network): 172.16.3.123

Topology of the current enviroment

   VM[192.168.10.30]──Network[192.168.10.0/24]──Router[pri_10_to_pvd]
                                 |
                                 |  GW: 172.16.3.201
                                 |
                              (External Link)
                                 |
                                 |  GW: 172.16.3.123
                                 |
   VM[192.168.20.30]──Network[192.168.20.0/24]──Router[pri_20_to_pvd]

Configuring static routes to connect the two subnets

1. Navigate to Project > Network > Topology.

   

2. Click the name of the router.

   

3. Click Static Routes on the banner, then click + Create Static Route.

   

4. Assign Destination CIDR and Next Hop, then click OK.

   Configure the pri_10_to_pvd router in Subnet 1 to reach Subnet 2 by adding a static route to 192.168.20.0/24 with the next hop set to 172.16.3.123.

   

5. Repeats steps 3 and 4 to the other router.

   Configure the pri_20_to_pvd router in Subnet 2 to reach Subnet 1 by adding a static route to 192.168.10.0/24 with the next hop set to 172.16.3.201.

   

6. Verify the attachment through console. See Connect to Instance by noVNC for more info.

   The demonstration confirms that VM 192.168.10.30 and VM 192.168.20.30 can successfully communicate with each other using ICMP.