gated.conf.4 (2010 09)

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Interfaces Statement

Interface Syntax

interfaces {

options

[ strictinterfaces ]

[ scaninterval time ]

[ aliases-nh ( primary | lowestip | keepall )]

;

interface interface_list

[ preference preference ]

[ down preference preference ]

[ passive ]

[ simplex ]

[ reject ]

[ blackhole ]

[ alias primary address ]

[ aliases-nh ( primary | lowestip | keepall )]

;

deﬁne address

[ broadcast address ]|[pointtopoint address ]

[ netmask mask ]

[ multicast ]

;

};

An interface is the connection between a router and one of its attached networks. A physical interface

may be speciﬁed by interface name, by IP address, or by domain name, (unless the network is an unnum-

bered point-to-point network.) Multiple levels of reference in the conﬁguration language allow

identiﬁcation of interfaces using wildcard, interface type name, or delete word address. Be careful with

the use of interface names as future Unix operating systems may allow more than one address per inter-

face. The interface_list is a list of one or more interface names including wildcard names (names without

a number) and names which may specify more than one interface or address, or the token all for all

interfaces.

options

Allows conﬁguration of some global options related to interfaces. These are:

strictinterfaces

Indicates that it is a fatal error to reference an interface in the conﬁguration ﬁle that is

not present when GateD is started and not listed in a deﬁne statement. Without this

option a warning message will be issued but GateD will continue.

scaninterval time

Speciﬁes how often GateD scans the kernel interface list for changes. The default is every

15 seconds on most systems, and 60 seconds on systems that pass interface status

changes through the routing socket (BSD 4.4). Note that GateD will also scan the inter-

face list on receipt of a SIGUSR2.

aliases-nh ( primary | lowestip | keepall )

Speciﬁes which address GateD will install as the next hop for interface routes when mul-

tiple addresses are assigned to an interface like the Service Guard environment. If

pri-

mary is used, the primary interface address (default) will be installed. If lowestip is

used, the address with the lowest IP address will be installed. If keepall is used, all

interface routes are kept in the kernel up to a maximum of RT_N_MULTIPATH routes.

This is a compile-time constant. This is a global parameter that may be overridden for

interfaces using the interface option.

Note: The

keepall option is mandatory when gated is being used in a Service Guard

environment.

interface interface_list

Sets interface options on the speciﬁed interfaces. An interface list is all or a list of interface

names (see warning about interface names), domain names, or numeric addresses. Options

available on this statement are:

HP-UX 11i Version 3: September 2010 − 7 − Hewlett-Packard Company 7