diff --git a/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine.rb b/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine.rb
index 1ca14ea7bd..61b979e40a 100644
--- a/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine.rb
+++ b/src/vmm_mad/remotes/lib/vcenter_driver/virtual_machine.rb
@@ -1896,13 +1896,17 @@ class VirtualMachine < Template
 
     # Returns an array of actions to be included in :deviceChange
     def calculate_add_nic_spec(nic)
-
         mac       = nic["MAC"]
         pg_name   = nic["BRIDGE"]
-        model     = one_item.retrieve_xmlelements("TEMPLATE/NIC_DEFAULT/MODEL") || nic["VCENTER_NET_MODEL"] || VCenterDriver::VIHelper.get_default("VM/TEMPLATE/NIC/MODEL")
+        if !one_item.retrieve_xmlelements("TEMPLATE/NIC_DEFAULT/MODEL").nil? && !one_item.retrieve_xmlelements("TEMPLATE/NIC_DEFAULT/MODEL").empty?
+            model = one_item.retrieve_xmlelements("TEMPLATE/NIC_DEFAULT/MODEL")
+        elsif  (model.nil? || model.empty?) && !nic["MODEL"].nil? && !nic["MODEL"].empty?
+            model = nic["MODEL"]
+        else
+            model = VCenterDriver::VIHelper.get_default("VM/TEMPLATE/NIC/MODEL")
+        end
         vnet_ref  = nic["VCENTER_NET_REF"]
         backing   = nil
-
         limit_in  = nic["INBOUND_PEAK_BW"] || VCenterDriver::VIHelper.get_default("VM/TEMPLATE/NIC/INBOUND_PEAK_BW")
         limit_out = nic["OUTBOUND_PEAK_BW"] || VCenterDriver::VIHelper.get_default("VM/TEMPLATE/NIC/OUTBOUND_PEAK_BW")
         limit     = nil
@@ -1996,9 +2000,14 @@ class VirtualMachine < Template
 
      # Returns an array of actions to be included in :deviceChange
     def calculate_add_nic_spec_autogenerate_mac(nic)
-
         pg_name   = nic["BRIDGE"]
-        model     = one_item.retrieve_xmlelements("TEMPLATE/NIC_DEFAULT/MODEL") || nic["VCENTER_NET_MODEL"] || VCenterDriver::VIHelper.get_default("VM/TEMPLATE/NIC/MODEL")
+        if !one_item.retrieve_xmlelements("TEMPLATE/NIC_DEFAULT/MODEL").nil? && !one_item.retrieve_xmlelements("TEMPLATE/NIC_DEFAULT/MODEL").empty?
+            model = one_item.retrieve_xmlelements("TEMPLATE/NIC_DEFAULT/MODEL")
+        elsif  (model.nil? || model.empty?) && !nic["MODEL"].nil? && !nic["MODEL"].empty?
+            model = nic["MODEL"]
+        else
+            model = VCenterDriver::VIHelper.get_default("VM/TEMPLATE/NIC/MODEL")
+        end
         vnet_ref  = nic["VCENTER_NET_REF"]
         backing   = nil