Changeset d2c332bc for chapter07/network.xml

Timestamp:

04/13/2006 06:45:33 PM (18 years ago)

Author:

Archaic <archaic@…>

Branches:

10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.5-systemd, 7.6, 7.6-systemd, 7.7, 7.7-systemd, 7.8, 7.8-systemd, 7.9, 7.9-systemd, 8.0, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

a0d96d25

Parents:

dd7ed7b

Message:

Merged the udev_update branch to trunk.

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@7509 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:

• chapter07/network.xml (modified) (1 diff)

chapter07/network.xml

@@ -23 +23 @@
   symlinks from all run-level directories (<filename
   class="directory">/etc/rc.d/rc*.d</filename>).</para>
+
+  <sect2>
+    <title>Creating stable names for network interfaces</title>
+
+    <para>Instructions in this section are optional if you have only one
+    network card.</para>
+
+    <para>With Udev and modular network drivers, the network interface numbering
+    is not persistent across reboots by default, because the drivers are loaded
+    in parallel and, thus, in random order. For example, on a computer having
+    two network cards made by Intel and Realtek, the network card manufactured
+    by Intel may become <filename class="devicefile">eth0</filename> and the
+    Realtek card becomes  <filename class="devicefile">eth1</filename>. In some
+    cases, after a reboot the cards get renumbered the other way around. To
+    avoid this, create Udev rules that assign stable names to network cards
+    based on their MAC addresses.</para>
+
+    <para>First, find out the MAC addresses of your network cards:</para>
+
+<screen role="nodump"><userinput>grep -H . /sys/class/net/*/address</userinput></screen>
+
+    <para>For each network card (but not for the loopback interface),
+    invent a descriptive name, such as <quote>realtek</quote>, and create
+    Udev rules similar to the following:</para>
+
+<screen role="nodump"><userinput>cat &gt; /etc/udev/rules.d/26-network.rules &lt;&lt; "EOF"
+<literal>ACTION=="add", SUBSYSTEM=="net", SYSFS{address}=="<replaceable>52:54:00:12:34:56</replaceable>", NAME="<replaceable>realtek</replaceable>"
+ACTION=="add", SUBSYSTEM=="net", SYSFS{address}=="<replaceable>00:a0:c9:78:9a:bc</replaceable>", NAME="<replaceable>intel</replaceable>"</literal>
+EOF</userinput></screen>
+
+    <para>These rules will always rename the network cards to
+    <quote>realtek</quote> and <quote>intel</quote>, independently of the
+    original numbering provided by the kernel. Use these names instead of
+    <quote>eth0</quote> in the network interface configuration files created
+    below.</para>
+
+    <note>
+      <para>Persistent names must be different from the default network
+      interface names assigned by the kernel.</para>
+    </note>
+
+  </sect2>
 
   <sect2>