diff --git a/doc/admin-guide-cloud/section_networking-scenarios.xml b/doc/admin-guide-cloud/section_networking-scenarios.xml
index 3d92b336ca..e9562fd343 100644
--- a/doc/admin-guide-cloud/section_networking-scenarios.xml
+++ b/doc/admin-guide-cloud/section_networking-scenarios.xml
@@ -599,6 +599,12 @@ physical_interface_mappings = physnet2:eth1</programlisting></para>
             simultaneously. This section describes different
             <emphasis>ML2</emphasis> plug-in and agent configurations with
             different type drivers and mechanism drivers.</para>
+        <para>Previously, Networking deployments were only able to use the
+            plug-in that had been selected at implementation time. For example,
+            a deployment running the Open vSwitch plug-in was only able to use
+            Open vSwitch exclusively; it wasn't possible to simultaneously run
+            another plug-in such as Linux Bridge. This was found to be a
+            limitation in environments with heterogeneous requirements.</para>
         <section xml:id="ml2_l2pop_scenarios">
             <title>ML2 with L2 population mechanism driver</title>
             <para>Current <emphasis>Open vSwitch</emphasis> and