gated.conf.4 (2010 09)

g
gated.conf(4) gated.conf(4)
minadvinterval time
The minimum time allowed between sending unsolicited broadcast or multicast
Router Advertisements from the interface. Must be no less than 3 seconds and no
greater than maxadvinterval. The default is 0.75 * maxadvinterval.
lifetime time
The lifetime of addresses in a Router Advertisement. Must be no less than maxad-
vinterval and no greater than 2:30:00 (two hours, thirty minutes or 9000 seconds).
The default is 3 * maxadvinterval.
address interface_list
Specifies the parameters that apply to the specified set of addresses on this physical interfaces.
Note a slight difference in convention from the rest of GateD, interface specifies just physical
interfaces (such as le0, ef0 and en1), while address specifies protocol (in this case IP)
addresses.
advertise
Specifies that the specified address(es) should be included in Router Advertise-
ments. This is the default.
ignore
Specifies that the specified address(es) should not be included in Router Advertise-
ments.
broadcast
Specifies that the given address(es) should be included in a broadcast Router Adver-
tisement because this system does not support IP multicasting, or some hosts on
attached network do not support IP multicasting. It is possible to mix addresses on
a physical interface such that some are included in a broadcast Router Advertise-
ment and some are included in a multicast Router Advertisement. This is the
default if the router does not support IP multicasting.
multicast
Specifies that the given address(es) should only be included in a multicast Router
Advertisement. If the system does not support IP multicasting, the address(es) will
not be included. If the system supports IP multicasting, the default is to include the
address(es) in a multicast Router Advertisement if the given interface supports IP
multicasting. If the given interface does not support IP multicasting, the
address(es) will be included in a broadcast Router Advertisement.
preference preference
The preferability of the address(es) as a default router address, relative to other
router addresses on the same subnet. A 32-bit, signed, twos-complement integer,
with higher values meaning more preferable. Note that hex 80000000 may only
be specified as ineligible . The default is 0.
ineligible
Specifies that the given address(es) will be assigned a preference of (hex 80000000)
which means that it is not eligible to be the default route for any hosts.
This is useful when the address(es) should not be used as a default route, but are
given as the next hop in an ICMP redirect. This allows the hosts to verify that the
given addresses are up and available.
The Router Discovery Client
A host listens for Router Advertisements via the all-hosts multicast address (224.0.0.1 ) if IP multicast-
ing is available and enabled, or on the interface broadcast address. When starting up, or when
reconfigured, a host may send a few Router Solicitations to the all-routers multicast address,
224.0.0.2 , or the interface broadcast address.
When a Router Advertisement with nonzero lifetime is received, the host installs a default route to each
of the advertised addresses. If the preference ineligible, or the address is not on an attached interface,
the route is marked unusable but retained. If the preference is usable, the metric is set as a function of
the preference such that the route with the best preference is used. If more than one address with the
same preference is received, the one with the lowest IP address will be used. These default routes are not
exportable to other protocols.
34 Hewlett-Packard Company − 34 − HP-UX 11i Version 3: September 2010