| 1 | <sect1 id="ch07-network">
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| 2 | <title>Configuring the network script</title>
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| 3 | <?dbhtml filename="network.html" dir="chapter07"?>
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| 4 |
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| 5 | <para>This section only applies if you're going to configure a network
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| 6 | card.</para>
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| 7 |
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| 8 | <para>If you don't have any network cards, you are most likely not going to
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| 9 | create any configuration files relating to network cards. If that is the
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| 10 | case, you must remove the <filename>network</filename> symlinks from all the
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| 11 | runlevel directories
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| 12 | (<filename class="directory">/etc/rc.d/rc*.d</filename>)</para>
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| 13 |
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| 14 | <sect2>
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| 15 | <title>Configuring default gateway</title>
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| 16 |
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| 17 | <para>If you're on a network you may need to setup the default gateway for
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| 18 | this machine. This is done by adding the proper values to the
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| 19 | /etc/sysconfig/network file by running the following:</para>
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| 20 |
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| 21 | <para><screen><userinput>cat >> /etc/sysconfig/network << "EOF"</userinput>
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| 22 | GATEWAY=192.168.1.2
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| 23 | GATEWAY_IF=eth0
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| 24 | <userinput>EOF</userinput></screen></para>
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| 25 |
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| 26 | <para>The values for GATEWAY and GATEWAY_IF need to be changed to match
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| 27 | your network setup. GATEWAY contains the IP address of the default
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| 28 | gateway, and GATEWAY_IF contains the network interface through which the
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| 29 | default gateway can be reached.</para>
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| 30 |
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| 31 | </sect2>
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| 32 |
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| 33 | <sect2>
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| 34 | <title>Creating network interface configuration files</title>
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| 35 |
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| 36 | <para>Which interfaces are brought up and down by the network script depends on
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| 37 | the files in the /etc/sysconfig/network-devices directory. This
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| 38 | directory should contain files in the form of ifconfig.xyz, where xyz is a
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| 39 | network interface name (such as eth0 or eth0:1)</para>
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| 40 |
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| 41 | <para>If you decide to rename or move this /etc/sysconfig/network-devices
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| 42 | directory, make sure you update the /etc/sysconfig/rc file as well and
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| 43 | update the network_devices by providing it with the new path.</para>
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| 44 |
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| 45 | <para>Now, new files are created in that directory containing the following.
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| 46 | The following command creates a sample ifconfig.eth0 file:</para>
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| 47 |
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| 48 | <para><screen><userinput>cat > /etc/sysconfig/network-devices/ifconfig.eth0 << "EOF"</userinput>
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| 49 | ONBOOT=yes
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| 50 | IP=192.168.1.1
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| 51 | NETMASK=255.255.255.0
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| 52 | BROADCAST=192.168.1.255
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| 53 | <userinput>EOF</userinput></screen></para>
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| 54 |
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| 55 | <para>Of course, the values of those variables have to be changed
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| 56 | in every file to match the proper setup. If the ONBOOT variable is set
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| 57 | to yes, the network script will bring it up during boot up of the system.
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| 58 | If set to anything else but yes it will be ignored by the network script
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| 59 | and thus not brought up.</para>
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| 60 |
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| 61 | </sect2>
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| 62 |
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| 63 | </sect1>
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| 64 |
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