Dynamic routing is a complex subject. Many protocol
do exist to exchange routes between IP hosts. Many
of those protocols involve some notion of security
(Which machine are allowed to tell me new routes).
This is not the case with routed. It use a fairly
simple protocol where every hosts is allowed to tell
every other host about the routes it knows. Using
a simple metric scheme, one is able to located
the best (or the real) route to a given network.
This is what RIP gives you. routed
implement the
RIP protocol.
You have three options you may control.
routed
won't have anything
to tell anyway. If you have more than one
interface but don't want to be known as a router
then this option is for you.