--- distrib/OpenvSwitch.rb	2015-08-17 08:23:42.211972047 +0200
+++ modif/OpenvSwitch.rb	2015-08-17 08:26:14.948156373 +0200
@@ -52,7 +52,7 @@
             arp_cache_poisoning if CONF[:arp_cache_poisoning]
 
             # Prevent Mac-spoofing
-            mac_spoofing
+            mac_spoofing if CONF[:arp_cache_poisoning]
 
             # Apply Firewall
             configure_fw if FIREWALL_PARAMS & @nic.keys != []