[050d775d] | 1 | <sect1 id="dhcpclient" xreflabel="Configuring the LFS bootscripts to support DHCP clients">
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| 2 | <?dbhtml filename="configdhcp.html" dir="connect"?>
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| 3 | <title>Configuring the LFS bootscripts to support DHCP clients</title>
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| 4 |
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| 5 | <sect2><title>Config files</title>
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[23e6faf] | 6 | <para><filename>/etc/sysconfig/network</filename>,
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| 7 | <filename>/etc/sysconfig/network-devices/ifup-eth0</filename>,
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| 8 | <filename>/etc/sysconfig/network-devices/ifdown-eth0</filename>,
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| 9 | <filename>/etc/sysconfig/network-devices/ifconfig.eth0</filename></para>
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[050d775d] | 10 | </sect2>
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| 11 |
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| 12 | <sect2><title>Configuration Information</title>
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| 13 |
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| 14 | <para>Note that on this and the following pages, we
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| 15 | use <userinput>eth0</userinput> as the example interface.
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| 16 | If you want to configure a different (or more than one) interface, simply
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| 17 | replace <userinput>eth0</userinput> with the interface you wish to use.</para>
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| 18 |
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| 19 | <para>These instructions will convert the configuration files from LFS
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| 20 | (a static configuration) to a configuration using the DHCP protocol.
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| 21 | Note that static and DHCP-based interfaces can co-exist on a LFS system. To
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| 22 | do this, you should only make the alterations to those interfaces which
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| 23 | need to support DHCP. All of the instructions on this page are applicable
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| 24 | no matter which DHCP client you intend to use.</para>
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| 25 |
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| 26 | <para>If the interface you intend to use as your default gateway is going to
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[52b9837f] | 27 | use DHCP, the first step is to remove the <envar>GATEWAY</envar> and
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| 28 | <envar>GATEWAY_IF</envar> variables
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[050d775d] | 29 | from <filename>/etc/sysconfig/network</filename>. This will only need to be
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| 30 | done once.</para>
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| 31 |
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| 32 | <para><screen><userinput>cd /etc/sysconfig &&
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| 33 | cp network network.bak &&
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| 34 | sed "s/GATEWAY/# GATEWAY/" network.bak > network</userinput></screen></para>
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| 35 |
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| 36 | <para>You then need to create scripts which will override the default
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| 37 | network scripts and provide DHCP support. These two scripts are generic and
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| 38 | so for use with both DHCP clients. First, the
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| 39 | <filename>ifup-eth0</filename> script:</para>
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| 40 |
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[40fb8a38] | 41 | <para><screen><userinput>cat > /etc/sysconfig/network-devices/ifup-eth0 << "EOF" </userinput>
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[050d775d] | 42 | #!/bin/sh
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| 43 |
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| 44 | source /etc/sysconfig/rc || exit
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| 45 | source $rc_functions || exit
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| 46 | source $network_devices/ifconfig.eth0 || exit
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| 47 |
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| 48 | echo "Bringing up the eth0 interface..."
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| 49 | modprobe eth0
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| 50 | loadproc $DHCP_PROG $DHCP_START
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| 51 | <userinput>EOF</userinput></screen></para>
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| 52 |
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| 53 | <para>Then the <filename>ifdown-eth0</filename> script:</para>
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| 54 |
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[40fb8a38] | 55 | <para><screen><userinput>cat > /etc/sysconfig/network-devices/ifdown-eth0 << "EOF" </userinput>
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[050d775d] | 56 | #!/bin/sh
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| 57 |
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| 58 | source /etc/sysconfig/rc || exit
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| 59 | source $rc_functions || exit
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| 60 | source $network_devices/ifconfig.eth0 || exit
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| 61 |
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| 62 | echo "Bringing down the eth0 interface..."
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| 63 | $DHCP_PROG $DHCP_STOP
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| 64 | evaluate_retval
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| 65 | <userinput>EOF</userinput></screen></para>
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| 66 |
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| 67 | <para>Finally, we need to make these scripts executable:</para>
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| 68 |
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[3d60760] | 69 | <para><screen><userinput>chmod 755 /etc/sysconfig/network-devices/ifup-eth0 &&
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| 70 | chmod 755 /etc/sysconfig/network-devices/ifdown-eth0</userinput></screen></para>
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[050d775d] | 71 |
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| 72 | </sect2>
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| 73 |
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| 74 | </sect1>
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| 75 |
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