Routing Information Protocol (RIP)
RIP is implemented by in.routed, the routing daemon, which automatically starts when the system
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.