A Router can send the packets for the destination along the route.
All of the rest can just have default routes. It is a technique in which the administrator manually adds the routes in a routing table. The only router that needs to know explicitly how to reach any of the 10.x.x.x routes is the central router at the top of your diagram. So instead of having a route to 20/8 and 30/8 on the subnet routers, you could just put a route to 0.0.0.0/0 pointing to 192.168.1.2 on the first router, 192.168.2.2 on the second one, and 192.168.3.2 on the third. In fact, you can eliminate the routes on the subnet routers, too, and just give them a default gateway to the central router. The 'default gateway' is really just a route to 0.0.0.0/0 which means 'the rest of the IP address space that I don't have a more specific route for'. For example: If you hover your mouse over. On the R1 router, configure a static route to the 192.168.1.0 network using the IP. This tells the PC 'when I have a packet that must go to a destination that is not on my own network, send it to 10.0.0.1, and that device will know what to do with it'. 2 Router Software Download 4431 Integrated Services Router for ISR 4431 Router Software IOS XE Software - Fuji-16. A router uses a routing table to determine where to send packets. So the subnet router port in the first network would have the address 10.0.0.1 and the PC would have 10.0.0.2 and the default gateway would point to 10.0.0.1.
The default gateway of each PC needs to be the same as the subnet router port IP in its network.
