diff --git a/openvimd.cfg b/openvimd.cfg
index 2d1aabb..bfa937a 100644
--- a/openvimd.cfg
+++ b/openvimd.cfg
@@ -72,8 +72,14 @@
 network_vlan_range_start: 3000
 network_vlan_range_end:   4000
 
+# Network overlay supported by openvim compute, bsae on openvswicth or linux bridges to manage management networks for NFVs.
+# - ovs : Create a vlxan mesh between computes to handle the network overlay, no prepopulated bridges or networks is need it.
+# - bridge: Use pre-populate linux bridges by openvim configuration scripts.
+
+network_type : ovs
+
 #host bridge interfaces for networks
-# Openvim cannot create bridge networks automatically, in the same way as other CMS do.
+# Openvim cannot create bridge networks automatically, in the same way as other CMS do when network type is "bridge".
 # Bridge networks need to be pre-provisioned on each host and Openvim uses those pre-provisioned bridge networks.
 # Openvim assumes that the following bridge interfaces have been created on each host, appropriately associated to a physical port.
 # The following information needs to be provided:
@@ -82,21 +88,21 @@
 #    - The speed of the physical port in Gbps, where that bridge interface was created
 # For instance, next example assumes that 10 bridges have been created on each host
 # using vlans 2001 to 2010, associated to a 1Gbps physical port 
-bridge_ifaces:
-   #name:      [vlan, speed in Gbps]
-   virbrMan1:  [2001, 1]
-   virbrMan2:  [2002, 1]
-   virbrMan3:  [2003, 1]
-   virbrMan4:  [2004, 1]
-   virbrMan5:  [2005, 1]
-   virbrMan6:  [2006, 1]
-   virbrMan7:  [2007, 1]
-   virbrMan8:  [2008, 1]
-   virbrMan9:  [2009, 1]
-   virbrMan10: [2010, 1]
+#bridge_ifaces:
+#   #name:      [vlan, speed in Gbps]
+#   virbrMan1:  [2001, 1]
+#   virbrMan2:  [2002, 1]
+#   virbrMan3:  [2003, 1]
+#   virbrMan4:  [2004, 1]
+#   virbrMan5:  [2005, 1]
+#   virbrMan6:  [2006, 1]
+#   virbrMan7:  [2007, 1]
+#   virbrMan8:  [2008, 1]
+#   virbrMan9:  [2009, 1]
+#   virbrMan10: [2010, 1]
 
 #Used only when 'mode' is at development'. Indicates which 'bridge_ifaces' is used for dataplane networks
-development_bridge: virbrMan10
+#development_bridge: virbrMan10
 
 #DHCP SERVER PARAMETERS. 
 #In case some of the previous 'bridge_ifaces' are connected to an EXTERNAL dhcp server, provide 
@@ -126,3 +132,5 @@
 log_level:       ERROR
 log_level_db:    DEBUG
 log_level_of:    DEBUG
+
+