diff --git a/gestion/ldap_crans.py b/gestion/ldap_crans.py
index 5c60aebc..a253f9b4 100755
--- a/gestion/ldap_crans.py
+++ b/gestion/ldap_crans.py
@@ -1817,6 +1817,12 @@ class machine(base_classes_crans) :
 
         self._set('macAddress',[mac])
         return mac
+
+    def mac2(self):
+        """Retourne l'adresse MAC + 2"""
+        mac = self.mac().split(":")
+        mac[-1] = "%0.2x" % (int(mac[-1], 16) + 2)
+        return ":".join(mac)
     
     def __host_alias(self,champ,new) :
         """ Vérification de la validité d'un nom de machine """