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<sect2 condition="supports-dhcp" id="dhcpd">
<title>Setting up a DHCP server</title>
<para>
One free software DHCP server is ISC <command>dhcpd</command>.
In &debian;, this is available in the <classname>dhcp</classname> package.
Here is a sample configuration file for it (usually
<filename>/etc/dhcpd.conf</filename>):
<informalexample><screen>
option domain-name "example.com";
option domain-name-servers ns1.example.com;
option subnet-mask 255.255.255.0;
default-lease-time 600;
max-lease-time 7200;
server-name "servername";
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.200 192.168.1.253;
option routers 192.168.1.1;
}
host clientname {
filename "/tftpboot/tftpboot.img";
server-name "servername";
next-server servername;
hardware ethernet 01:23:45:67:89:AB;
fixed-address 192.168.1.90;
}
</screen></informalexample>
Note: the new (and preferred) <classname>dhcp3</classname> package uses
<filename>/etc/dhcp3/dhcpd.conf</filename>.
</para><para>
In this example, there is one server
<replaceable>"servername"</replaceable> which performs all of the work
of DHCP, server, TFTP server, and network gateway. You will almost
certainly need to change the domain-name options, as well as the
server name and client hardware address. The
<replaceable>"filename"</replaceable> option should be the name of the
file which will be retrieved via TFTP.
</para><para>
After you have edited the <command>dhcpd</command> configuration file,
restart it with <userinput>/etc/init.d/dhcpd restart</userinput>.
</para>
<sect3 arch="x86">
<title>Enabling PXE Booting in the DHCP configuration</title>
<para>
Here is another example for a <filename>dhcp.conf</filename> using the
Pre-boot Execution Environment (PXE) method of TFTP.
<informalexample><screen>
option domain-name "example.com";
default-lease-time 6048;
max-lease-time 604800;
allow booting;
allow bootp;
# The next paragraph needs to be modified to fit your case
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.200 192.168.1.253;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.1.255;
# the gateway address which can be different
# (access to the internet for instance)
option routers 192.168.1.1;
# indicate the dns you want to use
option domain-name-servers 192.168.1.3;
}
host tftpserver {
# tftp server ip address
fixed-address 192.168.1.90;
# tftp server hardware address
hardware ethernet 01:23:45:67:89:AB;
}
group {
next-server 192.168.1.3;
host tftpclient {
# tftp client hardware address
hardware ethernet 00:10:DC:27:6C:15;
filename "/tftpboot/pxelinux.0";
}
}
</screen></informalexample>
Note that for PXE booting, the client filename <filename>pxelinux.0</filename>
is a boot loader, not a kernel image (see <xref linkend="tftp-images"/>
below).
</para>
</sect3>
</sect2>
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