Add interface static mode description

Change-Id: Ib5a8156057391cbe003bc07a1b8efe1106070035
Signed-off-by: Matei Valeanu <Matei.Valeanu@enea.com>

1 files changed, 26 insertions, 3 deletions

diff --git a/doc/book-enea-edge-getting-started/doc/installation_guide.xml b/doc/book-enea-edge-getting-started/doc/installation_guide.xml
index a61e385..23eef5f 100644
--- a/doc/book-enea-edge-getting-started/doc/installation_guide.xml
+++ b/doc/book-enea-edge-getting-started/doc/installation_guide.xml
@@ -933,8 +933,31 @@ of=/dev/sdb bs=4M conv=fsync</programlisting>
             </listitem>
 
             <listitem>
-              <para>Plug-in additional WAN interfaces (if applicable) and
-              provide their Layer 3 configuration.</para>
+              <para>Plug in additional WAN interfaces (if applicable) and
+              provide their Layer 3 configuration. An interface can be
+                configured in <literal>dhcp</literal> or 
+                <literal>static</literal> mode. When configured in static
+              mode, the following options are available:</para>
+
+              <itemizedlist spacing="compact">
+                <listitem>
+                  <para>Static IP (mandatory)</para>
+                </listitem>
+
+                <listitem>
+                  <para>Netmask (mandatory)</para>
+                </listitem>
+
+                <listitem>
+                  <para>Gateway (mandatory)</para>
+                </listitem>
+
+                <listitem>
+                  <para>DNS Server List (a comma separated list of IPv4
+                  addresses) (optional). If left empty it will use the
+                  Gateway as the DNS, with 1.1.1.1 as fallback.</para>
+                </listitem>
+              </itemizedlist>
             </listitem>
           </itemizedlist>
         </listitem>
@@ -1252,4 +1275,4 @@ of=/dev/sdb bs=4M conv=fsync</programlisting>
       </note>
     </section>
   </section>
-</chapter>
\ No newline at end of file
+</chapter>