FreeBSD6 Unleashed

Dynamic Routing

All our examples so far have used static routes, which are routes that never change. This is because in our examples up to this point, the routers have each only had one connection to the Internet. For example, in the previous section, simba accessed the Internet through the router at its ISP, and falcon accessed the Internet through simba. In both cases, these were the only access links that the router had to the Internet.

Sometimes, however, you may have multiple Internet connections or multiple routes to the same network. In this case, static routing does not work well. This is where dynamic routing comes in.

Dynamic routing uses a routing daemon, along with a routing protocol to discover new routes, and dynamically adds them ...