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