Painting Road Signs and Other Long-Lasting Directions

Painting Road Signs and Other Long-Lasting Directions

It takes a long time to build a highway and even longer to build a new town or city. But whenever a new road is finally finished, some old road signs might need to be updated because there might be a better way to drive to some nearby town. Thankfully, because it takes a long time to build a road, the road signs do not have to be repainted very often.

With routers, the network engineer can do the equivalent of painting the road signs. To do so, the engineer can configure a static IP route, which is configuration for a router that tells the router to add a particular entry to its routing table. For instance, in Figure 12-2, R1 didn't have a route to subnet 150.1.3.0, meaning it couldn't forward a packet that was destined for IP address 150.1.3.3. In Figure 12-3, the engineer solved the problem by configuring a static route on R1 for subnet 150.1.3.0, with outgoing interface Ethernet2, and next-hop router of 150.1.2.2.