Resorted CRG chapters and added IPv6 config to CloudAdminGuide

Config Ref now has sorted chapters (matches CLI chapters). IPv6
edited and moved to Cloud Admin Guide. Moved networking sections
into networking directory.

Change-Id: Ieffdf129af05c0483aca31eddb7fc824a113b9f3
Partial-Bug: #1290687

doc/admin-guide-cloud/compute/section_compute-configure-ipv6.xml

@@ -0,0 +1,61 @@
+<section xml:id="section_configuring-compute-to-use-ipv6-addresses"
+         xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         xmlns:ns5="http://www.w3.org/1999/xhtml"
+         xmlns:ns4="http://www.w3.org/2000/svg"
+         xmlns:ns3="http://www.w3.org/1998/Math/MathML"
+         xmlns:ns="http://docbook.org/ns/docbook" version="5.0">
+  <title>Configure Compute to use IPv6 addresses</title>
+  <para>If you are using OpenStack Compute with <systemitem>nova-network</systemitem>, you can put
+    Compute into IPv4/IPv6 dual-stack mode, so that it uses both IPv4 and IPv6 addresses for
+    communication. In IPv4/IPv6 dual-stack mode, instances can acquire their IPv6 global unicast
+    address by using a stateless address auto configuration mechanism [RFC 4862/2462]. IPv4/IPv6
+    dual-stack mode works with both <literal>VlanManager</literal> and
+      <literal>FlatDHCPManager</literal> networking modes. In <literal>VlanManager</literal>, each
+    project uses a different 64-bit global routing prefix. In <literal>FlatDHCPManager</literal>,
+    all instances use one 64-bit global routing prefix.</para>
+  <para>This configuration was tested with VM images that have an IPv6 stateless address auto
+    configuration capability. This capability is required for any VM you want to run with
+    an IPv6 address. You must use EUI-64 address for stateless address auto configuration.
+    Each node that executes a <literal>nova-*</literal> service must have
+    <literal>python-netaddr</literal> and <literal>radvd</literal> installed.
+  </para>
+  <procedure>
+    <title>Switch into IPv4/IPv6 dual-stack mode</title>
+    <step><para>On all nodes running a <literal>nova-*</literal> service, install
+          <systemitem>python-netaddr</systemitem>:</para>
+      <screen><prompt>#</prompt> <userinput>apt-get install python-netaddr</userinput></screen></step>
+    <step><para>On all <literal>nova-network</literal> nodes, install <literal>radvd</literal> and configure
+        IPv6 networking:</para>
+      <screen><prompt>#</prompt> <userinput>apt-get install radvd</userinput>
+<prompt>#</prompt> <userinput>echo 1 &gt; /proc/sys/net/ipv6/conf/all/forwarding</userinput>
+<prompt>#</prompt> <userinput>echo 0 &gt; /proc/sys/net/ipv6/conf/all/accept_ra</userinput></screen></step>
+    <step><para>Edit the <filename>nova.conf</filename> file on all nodes to specify
+          <literal>use_ipv6 = True</literal>.</para></step>
+    <step><para>Restart all <literal>nova-*</literal> services.</para></step>
+  </procedure>
+  <note><para>You can add a fixed range for IPv6 addresses to the <command>nova network-create</command>
+      command. Specify <option>public</option> or <option>private</option> after the
+        <option>network-create</option> parameter.</para>
+    <screen><prompt>$</prompt> <userinput>nova network-create public --fixed-range-v4 <replaceable>fixed_range_v4</replaceable> --vlan <replaceable>vlan_id</replaceable> --vpn <replaceable>vpn_start</replaceable> --fixed-range-v6 <replaceable>fixed_range_v6</replaceable></userinput></screen>
+    <para>You can set IPv6 global routing prefix by using the <option>--fixed_range_v6</option>
+       parameter. The default value for the parameter is: <literal>fd00::/48</literal>.
+    </para>
+    <itemizedlist>
+      <listitem>
+        <para>When you use <literal>FlatDHCPManager</literal>, the command uses the original
+          <option>--fixed_range_v6</option> value. For example:</para>
+        <screen><prompt>$</prompt> <userinput>nova network-create public  --fixed-range-v4 10.0.2.0/24 --fixed-range-v6 fd00:1::/48</userinput></screen>
+      </listitem>
+      <listitem>
+        <para>When you use <literal>VlanManager</literal>, the command
+          increments the subnet ID to create subnet prefixes.
+          Guest VMs use this prefix to generate their IPv6 global
+          unicast address. For example:</para>
+        <screen><prompt>$</prompt> <userinput>nova network-create public --fixed-range-v4 10.0.1.0/24 --vlan 100 --vpn 1000 --fixed-range-v6 fd00:1::/48</userinput></screen>
+      </listitem>
+    </itemizedlist>
+  </note>
+  <xi:include href="../../common/tables/nova-ipv6.xml"/>
+</section>