Added dual homing

Change-Id: I541b898fc158749a9c8ce5e00a40ec222c9b098f
diff --git a/configuration/external-connectivity.rst b/configuration/external-connectivity.rst
index e5c709f..f5102a7 100644
--- a/configuration/external-connectivity.rst
+++ b/configuration/external-connectivity.rst
@@ -16,9 +16,9 @@
 The vRouter data plane is entirely in hardware - essentially the entire hardware fabric serves as the (distributed) data plane for vRouter.
 The external router views the entire network infrastructure as a single router.
 
-.. image:: ../images/config-vrouter.png
+.. image:: ../images/config-vr.png
 
-.. image:: ../images/config-vrouter-external.png
+.. image:: ../images/config-vr-logical.png
 
 Physical Connectivity
 ^^^^^^^^^^^^^^^^^^^^^
@@ -27,7 +27,7 @@
 
 Therefore it is necessary to use an additional front panel port on the leaf-switch (or at least an additional vlan) to connect to the compute node hosting Quagga.
 
-.. image:: ../images/config-vrouter-physical-connection.png
+.. image:: ../images/config-vr-physical.png
 
 Configure vRouter
 ^^^^^^^^^^^^^^^^^