[246c904] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[6732c094] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[246c904] | 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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[275b1da] | 8 | <sect1 id="dhcp-client" xreflabel="DHCP-&dhcp-version; Client Configuration">
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[59ed37f9] | 9 | <?dbhtml filename="dhcpclient.html"?>
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[4839c17] | 10 |
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| 11 |
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[275b1da] | 12 | <title>DHCP-&dhcp-version; Client Configuration</title>
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[4839c17] | 13 |
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[59ed37f9] | 14 | <indexterm zone="dhcp-client">
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| 15 | <primary sortas="b-dhclient">dhclient</primary>
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| 16 | </indexterm>
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[4839c17] | 17 |
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[59ed37f9] | 18 | <para>The <application>DHCP</application> package comes with
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[893d9711] | 19 | both a client (<command>dhclient</command>) and a server program for
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| 20 | using DHCP. If you want to install this package,
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[bbdb0ff4] | 21 | the instructions can be found at <xref linkend="dhcp"/>.
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[893d9711] | 22 | Note that if you only want to use the client, you
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| 23 | do <emphasis>not</emphasis> need to run the server and so do not need
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[59ed37f9] | 24 | the startup script and links provided for the server daemon.
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[893d9711] | 25 | You only need to run the DHCP server if you're providing
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[59ed37f9] | 26 | this service to a network, and it's likely that you'll know if that's the
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| 27 | case; if it isn't, don't run the server! Once you have installed the
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| 28 | package, return here for information on how to configure the client
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| 29 | (<command>dhclient</command>).</para>
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[4839c17] | 30 |
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[59ed37f9] | 31 | <sect2 role="configuration">
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| 32 | <title>Configuring DHCP Client</title>
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[4839c17] | 33 |
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[697cb83f] | 34 | <para id="dhclient-service1010">To configure <command>dhclient</command>,
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[59ed37f9] | 35 | you need to first install the network service script,
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[fa3e12e1] | 36 | <filename>/lib/services/dhclient</filename>
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[5254d12] | 37 | included in the <xref linkend="bootscripts"/> package
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[59ed37f9] | 38 | (as <systemitem class="username">root</systemitem>):</para>
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[4839c17] | 39 |
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[697cb83f] | 40 | <indexterm zone="dhcp-client dhclient-service1010">
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[59ed37f9] | 41 | <primary sortas="f-dhclient">dhclient (service script)</primary>
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| 42 | </indexterm>
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[4839c17] | 43 |
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[59ed37f9] | 44 | <screen role='root'><userinput>make install-service-dhclient</userinput></screen>
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[4839c17] | 45 |
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[893d9711] | 46 | <para id="dhclient-config1">Next, create the
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[a805e52] | 47 | <filename>/etc/sysconfig/ifconfig.eth0</filename>
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[893d9711] | 48 | configuration file with the following commands as the <systemitem
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| 49 | class="username">root</systemitem> user. Adjust as
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[59ed37f9] | 50 | necessary for additional interfaces:</para>
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[4839c17] | 51 |
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[59ed37f9] | 52 | <indexterm zone="dhcp-client dhclient-config1">
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[fa3e12e1] | 53 | <primary sortas="e-etc-sysconfig-...-dhclient">/etc/sysconfig/ifconfig.eth0</primary>
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[59ed37f9] | 54 | </indexterm>
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[4839c17] | 55 |
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[a805e52] | 56 | <screen role='root'><userinput>cat > /etc/sysconfig/ifconfig.eth0 << "EOF"
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[59ed37f9] | 57 | <literal>ONBOOT="yes"
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[fa3e12e1] | 58 | IFACE="eth0"
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[afa198d] | 59 | SERVICE="dhclient"
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[fa3e12e1] | 60 | DHCP_START="<replaceable><add additional start parameters here></replaceable> eth0"
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| 61 | DHCP_STOP="-r <replaceable><add additional stop parameters here></replaceable>"
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[61e058b] | 62 |
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| 63 | # Set PRINTIP="yes" to have the script print
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| 64 | # the DHCP assigned IP address
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| 65 | PRINTIP="no"
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| 66 |
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| 67 | # Set PRINTALL="yes" to print the DHCP assigned values for
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| 68 | # IP, SM, DG, and 1st NS. This requires PRINTIP="yes".
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| 69 | PRINTALL="no"</literal>
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[59ed37f9] | 70 | EOF</userinput></screen>
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[4839c17] | 71 |
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[893d9711] | 72 | <para>For more information on the appropriate
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[4839c17] | 73 | <envar>DHCP_START</envar> and <envar>DHCP_STOP</envar>
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[59ed37f9] | 74 | values, examine the man page for <command>dhclient</command>.</para>
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[4839c17] | 75 |
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[893d9711] | 76 | <para id="dhclient-config2">Finally, you should create the
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| 77 | <filename>/etc/dhclient.conf</filename> file using the following commands
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[4839c17] | 78 | as the <systemitem class="username">root</systemitem> user:</para>
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| 79 |
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[59ed37f9] | 80 | <indexterm zone="dhcp-client dhclient-config2">
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| 81 | <primary sortas="e-etc-dhclient.conf">/etc/dhclient.conf</primary>
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| 82 | </indexterm>
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[4839c17] | 83 |
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[59ed37f9] | 84 | <note>
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[893d9711] | 85 | <para>You'll need to add a second interface definition to the file if you
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[59ed37f9] | 86 | have more than one interface.</para>
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| 87 | </note>
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[4839c17] | 88 |
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[59ed37f9] | 89 | <screen role='root'><userinput>cat > /etc/dhclient.conf << "EOF"
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| 90 | <literal># dhclient.conf
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[4839c17] | 91 |
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[f45b1953] | 92 | interface "eth0"{
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| 93 | prepend domain-name-servers 127.0.0.1;
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| 94 | request subnet-mask, broadcast-address, time-offset, routers,
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| 95 | domain-name, domain-name-servers, host-name;
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| 96 | require subnet-mask, domain-name-servers;
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| 97 | }
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[59ed37f9] | 98 | # end dhclient.conf</literal>
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| 99 | EOF</userinput></screen>
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[4839c17] | 100 |
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[59ed37f9] | 101 | </sect2>
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[f45b1953] | 102 |
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| 103 | </sect1>
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