Join three sites with static routes
Three routers in a row: R1 (LAN 192.168.1.0/24 with PC1), R2 in the middle (with a data-centre network 172.16.2.0/24 on Loopback0) and R3 (LAN 192.168.3.0/24 with PC3). All the interfaces are set up, but there are no routes.
- On R1 and R3: one default route each, towards R2.
- On R2: a static route to each LAN.
Finish with PC1 reaching PC3 and the 172.16.2.1 loopback.
How it works: this is VulnTech NetLab, a network simulator running in your browser. Click a device in the diagram to open its console and type commands, just like on real equipment (? shows help, Tab finishes a word). Click a cable to inspect it. Tasks tick themselves off as you complete them; questions are answered in the box under each task. Your work is kept if you reload; Reset starts the network over.
Solution explanation
R1 and R3 are at the edges, so a default route towards the middle covers everything. R2 is in the middle and needs a specific route to each LAN. 172.16.2.0/24 is connected on R2, so it needs no route there; R1 and R3 reach it through their default routes.
Show solution
[R1]
enable
configure terminal
ip route 0.0.0.0 0.0.0.0 10.0.12.2
end
[R3]
enable
configure terminal
ip route 0.0.0.0 0.0.0.0 10.0.23.1
end
[R2]
enable
configure terminal
ip route 192.168.1.0 255.255.255.0 10.0.12.1
ip route 192.168.3.0 255.255.255.0 10.0.23.2
end
[PC1]
ping 192.168.3.10
ping 172.16.2.1