HP-UX Reference (11i v1 05/09) - 4 File Formats (vol 8)

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gated.conf(4) gated.conf(4)

addresses.

advertise

Speciﬁes that the speciﬁed address(es) should be included in Router Advertisements.

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 Advertisement

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)ifIPmulticasting

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 non-zero 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 export-

able to other protocols.

When a Router Advertisement with a zero lifetime is received, the host deletes all routes with next-hop

addresses learned from that router. In addition, any routers learned from ICMP redirects pointing to these

addresses will be deleted. The same will happen when a Router Advertisement is not received to refresh

these routes before the lifetime expires.

The Router Discovery Client Statement

routerdiscovery client yes | no | on | off [ {

traceoptions trace_options ;

preference preference ;

interface interface_list

[ enable ]|[disable ]

[ broadcast ]|[multicast ]

[ quiet ]|[solicit ]

;

HP-UX 11i Version 1: September 2005 − 34 − Hewlett-Packard Company Section 4−−103