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auto_parms(1M) auto_parms(1M)

NAME

auto_parms - initial system conﬁguration/DHCP support script

SYNOPSIS

auto_parms

DESCRIPTION

auto_parms is a system initialization script whose primary responsibility lies in handling ﬁrst time boot

conﬁguration and ongoing management of the DHCP lease(s). auto_parms is invoked at boot time by

the /sbin/rc script. Initially, it will load a list of available ethernet interfaces and begin requesting a

DHCP lease on each interface, stopping when a valid lease is secured or the list is exhausted.

As a part of checking for the availabilityof a lease on a particular interface, auto_parms will also consult

/etc/rc.config.d/netconf and examine the variable DHCP_ENABLE[index]. If

DHCP_ENABLE[index] is set to ’1’, auto_parms will attempt to request a lease on the the interface

designated by ’index’. If DHCP_ENABLE[index] is set to ’0’ (the default case) or does not exist in

/etc/rc.config.d/netconf, auto_parms will not attempt the DHCP request over the interface.

Once a lease is secured, the information supplied with the lease will be used to initialize key networking

parameters (see dhcpdb2conf(1M)).

If auto_parms detects that the system is going through a "ﬁrst time boot" (keyed by the hostname for

the system not being set), it will invoke set_parms for the purpose of verifying the DHCP supplied

parameters as well as collecting any parameters not supplied by DHCP.

For all subsequent boots, the data supplied by a DHCP lease is assumed to be deﬁnitive and will be recog-

nized as such by auto_parms . Note that in an environment (non-mobile) where DHCP is being used for

IP address management, the lease information will not change from boot to boot under normal conditions.

This is accomplished by auto_parms ensuring that the dhcpclient is placed in "lease maintenance

mode" prior to exiting.

FILES

/sbin/auto_parms

/sbin/set_parms.util

EXAMPLES

See /sbin/rc for invocation context