glfs/connect/dhcp/dhcp-client.xml
Bruce Dubbs 246c904b82 New XML Part IV (Chapters 13-15)
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@2298 af4574ff-66df-0310-9fd7-8a98e5e911e0
2004-06-12 01:11:39 +00:00

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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../../general.ent">
%general-entities;
]>
<sect1 id="connect-dhcp-client">
<?dbhtml filename="dhcpclient.html"?>
<title>DHCP-&dhcp-version;</title>
<para>The <application><acronym>DHCP</acronym></application> package comes with
both a client (<command>dhclient</command>) and a server program for
using <acronym>DHCP</acronym>. If you want to install this package,
the instructions can be found at <xref linkend="dhcp"/>.
Note that if you only want to use the client, you
do <emphasis>not</emphasis> need to run the server and so do not need
the startup script and links provided for the server daemon.
You only need to run the <acronym>DHCP</acronym> server if you're providing
this service to a network, and it's likely that you'll know if that's the
case; if it isn't, don't run the server! Once you have installed the
package, return here for information on how to configure the client
(<command>dhclient</command>).</para>
<para>To configure <command>dhclient</command>, you need to first install
the network service script,
<filename>/etc/sysconfig/network-devices/services/dhclient</filename>
included in the <xref linkend="intro-important-bootscripts"/> package.</para>
<screen><userinput><command>make install-service-dhclient</command></userinput></screen>
<para>Next, create the <filename>ifconfig.eth0</filename>
file with the following commands. Adjust as necessary for additional
interfaces.</para>
<para><emphasis>Note</emphasis>: this will overwrite any existing file.</para>
<screen><userinput><command>cat &gt; /etc/sysconfig/network-devices/ifconfig.eth0 &lt;&lt; "EOF"</command>
ONBOOT=yes
DHCP_START="<replaceable>[place appropriate start parameters here]</replaceable>"
DHCP_STOP="-r <replaceable>[add additional stop parameters here]</replaceable>"
SERVICE=dhclient
<command>EOF</command></userinput></screen>
<para>For more information on the appropriate
<envar>DHCP_START</envar> and <envar>DHCP_STOP</envar>
values, examine the man page for <command>dhclient</command>.</para>
<para> You should then create
<filename>/etc/dhclient.conf</filename> using the following
commands. Append to the file if you have more than one interface:</para>
<screen><userinput><command>cat &gt; /etc/dhclient.conf &lt;&lt; "EOF"</command>
# dhclient.conf
interface "eth0"{
prepend domain-name-servers 127.0.0.1;
request subnet-mask, broadcast-address, time-offset, routers,
domain-name, domain-name-servers, host-name;
require subnet-mask, domain-name-servers;
}
# end dhclient.conf
<command>EOF</command></userinput></screen>
<para>Finally, if the <acronym>DHCP</acronym> configured interface is
used as your default gateway, you should remove the GATEWAY and GATEWAY_IF
variables from <filename>/etc/sysconfig/network</filename>: </para>
<screen><userinput><command>sed -i "s/GATEWAY/#GATEWAY/" /etc/sysconfig/network</command></userinput></screen>
</sect1>