If /etc/defaultrouter file exists then in.routed and in.rdisc will not be
started.
If it does not exist then in.rdisc is started first, it uses ICMP router
discovery
to find devices that broadcast itself as gateway and adds routes if any
found. If
no devices advertise themself as gateways then in.routed is started.
If you have one interface then in.routed -q is started (Learns routes)
for systems with more than one interface in.routed -s is started (Learns and
broadcasts routes)
If you have /etc/notrouter then system with multiple interface also starts
in.routed -q
You can also use the /etc/gateways file with in.routed
The /etc/gateways file takes the following syntax
<net|host> <destination> gateway <gateway> metric <value> <active|passive>
active: This route can be taken off if the gateway does not advertise itself
as
a gateway anymore
passive: This is a permanent entry in routing table. Used when gateway does
not
advertise itself as gateway.
/etc/gateways files also takes syntax like
norip <interface> No ripin/ripout on this interface
ripout <interface> ripout but no ripin on this interface
ripin <interface> ripin but no ripout on this interface
Preet
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