1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.4/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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8 | <sect1 id="dhcp-client" xreflabel="DHCP-&dhcp-version; Client">
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9 | <sect1info>
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10 | <othername>$LastChangedBy$</othername>
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11 | <date>$Date$</date>
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12 | </sect1info>
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13 | <?dbhtml filename="dhcpclient.html"?>
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14 | <title>DHCP-&dhcp-version; Client</title>
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15 | <indexterm zone="dhcp-client">
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16 | <primary sortas="b-dhclient">dhclient</primary></indexterm>
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17 |
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18 | <para>The <application><acronym>DHCP</acronym></application> package comes with
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19 | both a client (<command>dhclient</command>) and a server program for
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20 | using <acronym>DHCP</acronym>. If you want to install this package,
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21 | the instructions can be found at <xref linkend="dhcp"/>.
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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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24 | the startup script and links provided for the server daemon.
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25 | You only need to run the <acronym>DHCP</acronym> server if you're providing
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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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30 |
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31 | <para id="dhclient-service">To configure <command>dhclient</command>, you need
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32 | to first install the network service script,
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33 | <filename>/etc/sysconfig/network-devices/services/dhclient</filename>
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34 | included in the <xref linkend="intro-important-bootscripts"/> package
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35 | (as root).</para>
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36 | <indexterm zone="dhcp-client dhclient-service">
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37 | <primary sortas="f-dhclient">dhclient (service script)</primary></indexterm>
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38 |
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39 | <screen><userinput role='root'><command>make install-service-dhclient</command></userinput></screen>
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40 |
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41 | <para id="dhclient-config1">Next, create the
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42 | <filename>/etc/sysconfig/network-devices/ifconfig.eth0/dhclient</filename>
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43 | configuration file with the following commands as the root user. Adjust as
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44 | necessary for additional interfaces.</para>
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45 | <indexterm zone="dhcp-client dhclient-config1">
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46 | <primary
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47 | sortas="e-etc-sysconfig-...-dhclient">/etc/sysconfig/.../dhclient</primary>
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48 | </indexterm>
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49 |
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50 | <screen><userinput role='root'><command>install -d /etc/sysconfig/network-devices/ifconfig.eth0 &&
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51 | cat > /etc/sysconfig/network-devices/ifconfig.eth0/dhclient << "EOF"</command>
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52 | ONBOOT="yes"
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53 | SERVICE="dhclient"
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54 | DHCP_START="-q <replaceable>[add additional start parameters here]</replaceable>"
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55 | DHCP_STOP="-q -r <replaceable>[add additional stop parameters here]</replaceable>"
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56 | <command>EOF</command></userinput></screen>
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57 |
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58 | <para>For more information on the appropriate
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59 | <envar>DHCP_START</envar> and <envar>DHCP_STOP</envar>
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60 | values, examine the man page for <command>dhclient</command>.</para>
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61 |
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62 | <para id="dhclient-config2">Finally, you should create the
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63 | <filename>/etc/dhclient.conf</filename> file using the following
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64 | commands as the root user:</para>
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65 | <indexterm zone="dhcp-client dhclient-config2">
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66 | <primary sortas="e-etc-dhclient.conf">/etc/dhclient.conf</primary></indexterm>
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67 |
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68 | <note><para>You'll need to add a second interface definition to the file if you
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69 | have more than one interface.</para></note>
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70 |
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71 | <screen><userinput role='root'><command>cat > /etc/dhclient.conf << "EOF"</command>
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72 | # dhclient.conf
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73 |
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74 | interface "eth0"{
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75 | prepend domain-name-servers 127.0.0.1;
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76 | request subnet-mask, broadcast-address, time-offset, routers,
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77 | domain-name, domain-name-servers, host-name;
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78 | require subnet-mask, domain-name-servers;
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79 | }
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80 | # end dhclient.conf
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81 | <command>EOF</command></userinput></screen>
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82 |
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83 | </sect1>
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