| 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 | <sect2>
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| 9 | <title>Configuring default gateway</title>
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| 10 |
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| 11 | <para>If you're on a network you may need to setup the default gateway for
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| 12 | this machine. This is done by adding the proper values to the
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| 13 | /etc/sysconfig/network file by running the following:</para>
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| 14 |
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| 15 | <para><screen><userinput>cat >> /etc/sysconfig/network << "EOF"</userinput>
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| 16 | GATEWAY=192.168.1.2
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| 17 | GATEWAY_IF=eth0
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| 18 | <userinput>EOF</userinput></screen></para>
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| 19 |
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| 20 | <para>The values for GATEWAY and GATEWAY_IF need to be changed to match
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| 21 | your network setup. GATEWAY contains the IP address of the default
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| 22 | gateway, and GATEWAY_IF contains the network interface through which the
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| 23 | default gateway can be reached.</para>
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| 24 |
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| 25 | </sect2>
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| 26 |
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| 27 | <sect2>
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| 28 | <title>Creating network interface configuration files</title>
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| 29 |
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| 30 | <para>Which interfaces are brought up and down by the network script depends on
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| 31 | the files in the /etc/sysconfig/network-devices directory. This
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| 32 | directory should contain files in the form of ifconfig.xyz, where xyz is a
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| 33 | network interface name (such as eth0 or eth0:1)</para>
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| 34 |
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| 35 | <para>First let's create this directory by running:</para>
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| 36 |
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| 37 | <para><screen><userinput>mkdir /etc/sysconfig/network-devices</userinput></screen></para>
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| 38 |
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| 39 | <para>Now, new files are created in that directory containing the following.
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| 40 | The following command creates a sample ifconfig.eth0 file:</para>
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| 41 |
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| 42 | <para><screen><userinput>cat > /etc/sysconfig/network-devices/ifconfig.eth0 << "EOF"</userinput>
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| 43 | ONBOOT=yes
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| 44 | DEVICE=eth0
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| 45 | IP=192.168.1.1
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| 46 | NETMASK=255.255.255.0
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| 47 | BROADCAST=192.168.1.255
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| 48 | <userinput>EOF</userinput></screen></para>
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| 49 |
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| 50 | <para>Of course, the values of those variables have to be changed
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| 51 | in every file to match the proper setup. Usually NETMASK and BROADCAST
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| 52 | will remain the same, just the DEVICE and IP variables will change per
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| 53 | network interface. If the ONBOOT variable is set to yes, the network script
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| 54 | will bring it up during boot up of the system. If set to anything else but
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| 55 | yes it will be ignored by the network script and thus not brought up.</para>
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| 56 |
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| 57 | </sect2>
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| 58 |
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| 59 | </sect1>
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| 60 |
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