diff --git a/src/vnm_mad/remotes/ebtables/Ebtables.rb b/src/vnm_mad/remotes/ebtables/Ebtables.rb
index 860a56fb0a..c22ad69340 100644
--- a/src/vnm_mad/remotes/ebtables/Ebtables.rb
+++ b/src/vnm_mad/remotes/ebtables/Ebtables.rb
@@ -22,7 +22,7 @@ class EbtablesVLAN < OpenNebulaNetwork
     end
 
     def ebtables(rule)
-        exec_and_log("#{COMMANDS[:ebtables]} -A #{rule}")
+        OpenNebula.exec_and_log("#{COMMANDS[:ebtables]} -A #{rule}")
     end
 
     # Activates ebtables rules
@@ -82,6 +82,6 @@ class EbtablesVLAN < OpenNebulaNetwork
     end
 
     def remove_rule(rule)
-        exec_and_log("#{COMMANDS[:ebtables]} -D FORWARD #{rule}")
+        OpenNebula.exec_and_log("#{COMMANDS[:ebtables]} -D FORWARD #{rule}")
     end
 end
diff --git a/src/vnm_mad/remotes/ovswitch/OpenvSwitch.rb b/src/vnm_mad/remotes/ovswitch/OpenvSwitch.rb
index fdbf91c21e..9716d99f8a 100644
--- a/src/vnm_mad/remotes/ovswitch/OpenvSwitch.rb
+++ b/src/vnm_mad/remotes/ovswitch/OpenvSwitch.rb
@@ -32,7 +32,7 @@ class OpenvSwitchVLAN < OpenNebulaNetwork
             cmd =  "#{COMMANDS[:ovs_vsctl]} set Port #{nic[:tap]} "
             cmd << "tag=#{vlan}"
 
-            exec_and_log(cmd)
+            OpenNebula.exec_and_log(cmd)
         end
 
         return 0