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HP-UX 11i Version 3: February 2007

Technical documentation

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auto_parms — initial system configuration plus DHCP support command




The auto_parms command is a system initialization command that handles first-boot configuration, that is, the setting of unique system "initial identity parameters", and ongoing management of DHCP lease(s). The auto_parms command is invoked at boot time by the /sbin/rc command. Initially it loads a list of available ethernet interfaces and requests a DHCP lease on each interface. See the rc(1M) manpage for information about /sbin/rc for invocation context.

While checking for availability of a lease on each interface, auto_parms also consults /etc/rc.config.d/netconf and examines the variable DHCP_ENABLE[index]. If it is set to "1", auto_parms attempts to request a lease on the the interface designated by index. If DHCP_ENABLE[index] is set to "0" (the default case) or is absent from /etc/rc.config.d/netconf, auto_parms does not attempt a DHCP request on that interface.

Once a lease is secured, the information supplied with the lease is used to initialize key networking parameters; see dhcpdb2conf(1M).

If auto_parms detects that the system is undergoing "first-boot" (meaning the system's hostname is not yet set), it invokes set_parms to verify the DHCP-supplied parameters and to collect any parameters not supplied by DHCP.

For all subsequent boots, the data supplied by a DHCP lease is assumed by auto_parms to be correct. Note that in a (non-mobile) environment where DHCP is used for IP address management, under normal conditions the lease information should not change between reboots. This is accomplished by auto_parms placing dhcpclient in "lease maintenance mode" prior to exiting.



The command itself.


Common subroutines used by auto_parms, set_parms, and set_parms sub-area commands.

Log files written and saved by auto_parms:




The auto_parms command was developed by HP.

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