Routing Information Protocol (RIP)
RIP is implemented by in.routed, the routing daemon,
which automatically starts when the machine boots. When run on a router with
the s option specified, in.routed fills the kernel routing table with a route to every reachable
network and advertises “reachability” through all network interfaces.
When run on a host with the q option
specified, in.routed extracts routing information but does
not advertise reachability. On hosts, routing information can be extracted
in two ways:
Do not specify the S flag (capital “S”: “Space-saving mode”). in.routed builds a full routing table exactly as it does on a router.
Specify the S flag. in.routed creates a minimal kernel table, containing a single default
route for each available router.