diff --git a/machines/migrations/0048_auto_20170823_2315.py b/machines/migrations/0048_auto_20170823_2315.py
new file mode 100644
index 00000000..0c0a48f3
--- /dev/null
+++ b/machines/migrations/0048_auto_20170823_2315.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.7 on 2017-08-23 21:15
+from __future__ import unicode_literals
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('machines', '0047_auto_20170809_0606'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='iptype',
+            name='domaine_range',
+            field=models.IntegerField(validators=[django.core.validators.MinValueValidator(16), django.core.validators.MaxValueValidator(32)]),
+        ),
+    ]
diff --git a/machines/models.py b/machines/models.py
index 2207d1b6..bd4426c3 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -68,7 +68,7 @@ class IpType(models.Model):
     extension = models.ForeignKey('Extension', on_delete=models.PROTECT)
     need_infra = models.BooleanField(default=False)
     domaine_ip = models.GenericIPAddressField(protocol='IPv4')
-    domaine_range = models.IntegerField(validators=[MinValueValidator(8), MaxValueValidator(32)])
+    domaine_range = models.IntegerField(validators=[MinValueValidator(16), MaxValueValidator(32)])
 
     @cached_property
     def network(self):
@@ -94,8 +94,9 @@ class IpType(models.Model):
 
     def gen_ip_range(self):
         # Creation du range d'ip dans les objets iplist
-        for ip in self.ip_network.iter_hosts():
-            obj, created = IpList.objects.get_or_create(ip_type=self, ipv4=str(ip))
+        ip_obj = [IpList(ip_type=self, ipv4=str(ip)) for ip in self.ip_network.iter_hosts()]
+        IpList.objects.bulk_create(ip_obj)
+        return
 
     def del_ip_range(self):
         """ Methode dépréciée, IpList est en mode cascade et supprimé automatiquement"""