[246c904] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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[f45b1953] | 8 | <sect1 id="connect-dhcp-client">
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[00bb024c] | 9 | <?dbhtml filename="dhcpclient.html"?>
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[f07203c5] | 10 | <title>DHCP-&dhcp-version;</title>
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[f45b1953] | 11 |
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[f07203c5] | 12 | <para>The <application><acronym>DHCP</acronym></application> package comes with
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[1af021dc] | 13 | both a client (<command>dhclient</command>) and a server program for
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[f07203c5] | 14 | using <acronym>DHCP</acronym>. If you want to install this package,
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[050d775d] | 15 | the instructions can be found at <xref linkend="dhcp"/>.
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| 16 | Note that if you only want to use the client, you
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| 17 | do <emphasis>not</emphasis> need to run the server and so do not need
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| 18 | the startup script and links provided for the server daemon.
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[36f9a23] | 19 | You only need to run the <acronym>DHCP</acronym> server if you're providing
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| 20 | this service to a network, and it's likely that you'll know if that's the
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[050d775d] | 21 | case; if it isn't, don't run the server! Once you have installed the
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| 22 | package, return here for information on how to configure the client
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[36f9a23] | 23 | (<command>dhclient</command>).</para>
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[f45b1953] | 24 |
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[1af021dc] | 25 | <para>To configure <command>dhclient</command>, you need to first install
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[b5ea3492] | 26 | the network service script,
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| 27 | <filename>/etc/sysconfig/network-devices/services/dhclient</filename>
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| 28 | included in the <xref linkend="intro-important-bootscripts"/> package.</para>
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[f45b1953] | 29 |
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[b5ea3492] | 30 | <screen><userinput><command>make install-service-dhclient</command></userinput></screen>
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[050d775d] | 31 |
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[b5ea3492] | 32 | <para>Next, create the <filename>ifconfig.eth0</filename>
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| 33 | file with the following commands. Adjust as necessary for additional
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| 34 | interfaces.</para>
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| 35 |
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| 36 | <para><emphasis>Note</emphasis>: this will overwrite any existing file.</para>
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| 37 |
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| 38 | <screen><userinput><command>cat > /etc/sysconfig/network-devices/ifconfig.eth0 << "EOF"</command>
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[050d775d] | 39 | ONBOOT=yes
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[e009883] | 40 | DHCP_START="<replaceable>[place appropriate start parameters here]</replaceable>"
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[1af021dc] | 41 | DHCP_STOP="-r <replaceable>[add additional stop parameters here]</replaceable>"
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[b5ea3492] | 42 | SERVICE=dhclient
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[36f9a23] | 43 | <command>EOF</command></userinput></screen>
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[050d775d] | 44 |
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[a338b48] | 45 | <para>For more information on the appropriate
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[52b9837f] | 46 | <envar>DHCP_START</envar> and <envar>DHCP_STOP</envar>
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[36f9a23] | 47 | values, examine the man page for <command>dhclient</command>.</para>
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[050d775d] | 48 |
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[4cc9270] | 49 | <para> You should then create
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[1af021dc] | 50 | <filename>/etc/dhclient.conf</filename> using the following
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[b5ea3492] | 51 | commands. Append to the file if you have more than one interface:</para>
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[f45b1953] | 52 |
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[36f9a23] | 53 | <screen><userinput><command>cat > /etc/dhclient.conf << "EOF"</command>
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[f45b1953] | 54 | # dhclient.conf
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| 55 |
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| 56 | interface "eth0"{
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| 57 | prepend domain-name-servers 127.0.0.1;
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| 58 | request subnet-mask, broadcast-address, time-offset, routers,
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| 59 | domain-name, domain-name-servers, host-name;
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| 60 | require subnet-mask, domain-name-servers;
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| 61 | }
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| 62 | # end dhclient.conf
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[36f9a23] | 63 | <command>EOF</command></userinput></screen>
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[f45b1953] | 64 |
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[4cc9270] | 65 | <para>Finally, if the <acronym>DHCP</acronym> configured interface is
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| 66 | used as your default gateway, you should remove the GATEWAY and GATEWAY_IF
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| 67 | variables from <filename>/etc/sysconfig/network</filename>: </para>
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| 68 |
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| 69 | <screen><userinput><command>sed -i "s/GATEWAY/#GATEWAY/" /etc/sysconfig/network</command></userinput></screen>
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| 70 |
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[f45b1953] | 71 | </sect1>
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