Installing and Administering Internet Services

Chapter 6 269
Dynamic Host Configuration Protocol (DHCP)
Configuring DHCP
number. An example of a subnet mask is
255.255.255.0.
Subnet Address
Pool: Click this button to select the range of IP addresses
that you allocated in the section, “Preparing to
Configure a DHCP Server” on page 267. A new
screen will be displayed where you can enter the
START and END address. If there are addresses
within the range that you picked that you do not
want allocated via DHCP, you can use the Reserved
Addresses button to specify those.
Allow Any
Device Class: The SAM default is to allow any type of DHCP
device to use the group of IP address you are
configuring. This may be undesirable if you use a
different method (or a different DHCP server or
group) for managing systems such as PCs running
Win95 or NT. If you want this range of
addresses to be used only by HP-UX systems, then
unselect this button, and enter the text:
“HewlettPackard.HP-UX” in the text field provided.
Automatic
Allocation to
Bootp Clients: Leave this option disabled. Enabling it will cause
problems for bootp devices, such as printers and
terminals, that rely only on their pre-configured
server to respond to boot request.
Accept New
Clients: Leave this option enabled. It allows new clients to
be added to the DHCP group.
Address Lease
Time: The lease time shouldbe set sufficiently long so that
if a client system is temporarily out of service for a
time, its lease will not expire too soon. Infinite
leases will never expire and disable the IP address
reclamation feature of DHCP.
Boot file name: Leave this field blank.
10.After filling in the parameter fields on the Add DHCP Group screen,
click OK. SAM will make the modifications to the /etc/dhcptab file.