diff --git a/machines/forms.py b/machines/forms.py
index ff529295..49150349 100644
--- a/machines/forms.py
+++ b/machines/forms.py
@@ -219,7 +219,8 @@ class IpTypeForm(FormRevMixin, ModelForm):
         model = IpType
         fields = ['type', 'extension', 'need_infra', 'domaine_ip_start',
                   'domaine_ip_stop', 'dnssec_reverse_v4', 'prefix_v6',
-                  'dnssec_reverse_v6', 'vlan', 'ouverture_ports']
+                  'prefix_v6_length','dnssec_reverse_v6', 'vlan',
+                  'ouverture_ports']
 
     def __init__(self, *args, **kwargs):
         prefix = kwargs.pop('prefix', self.Meta.model.__name__)
@@ -231,8 +232,8 @@ class EditIpTypeForm(IpTypeForm):
     """Edition d'un iptype. Pas d'edition du rangev4 possible, car il faudrait
     synchroniser les objets iplist"""
     class Meta(IpTypeForm.Meta):
-        fields = ['extension', 'type', 'need_infra', 'prefix_v6', 'vlan',
-                  'dnssec_reverse_v4', 'dnssec_reverse_v6',
+        fields = ['extension', 'type', 'need_infra', 'prefix_v6', 'prefix_v6_length',
+                  'vlan', 'dnssec_reverse_v4', 'dnssec_reverse_v6',
                   'ouverture_ports']
 
 
diff --git a/machines/migrations/0088_iptype_prefix_v6_length.py b/machines/migrations/0088_iptype_prefix_v6_length.py
new file mode 100644
index 00000000..e061167c
--- /dev/null
+++ b/machines/migrations/0088_iptype_prefix_v6_length.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.7 on 2018-07-16 18:46
+from __future__ import unicode_literals
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('machines', '0087_dnssec'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='iptype',
+            name='prefix_v6_length',
+            field=models.IntegerField(default=64, validators=[django.core.validators.MaxValueValidator(128), django.core.validators.MinValueValidator(0)]),
+        ),
+    ]
diff --git a/machines/models.py b/machines/models.py
index 1cfee990..2f5a6a62 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -41,8 +41,8 @@ from django.dispatch import receiver
 from django.forms import ValidationError
 from django.utils.functional import cached_property
 from django.utils import timezone
-from django.core.validators import MaxValueValidator
 from django.utils.translation import ugettext_lazy as _l
+from django.core.validators import MaxValueValidator, MinValueValidator
 
 from macaddress.fields import MACAddressField
 
@@ -265,6 +265,13 @@ class IpType(RevMixin, AclMixin, models.Model):
         null=True,
         blank=True
     )
+    prefix_v6_length = models.IntegerField(
+        default=64,
+        validators=[
+            MaxValueValidator(128),
+            MinValueValidator(0)
+        ]
+        )
     dnssec_reverse_v6 = models.BooleanField(
             default=False,
             help_text="Activer DNSSEC sur le reverse DNS IPv6",
@@ -302,6 +309,33 @@ class IpType(RevMixin, AclMixin, models.Model):
         """ Renvoie une liste des ip en string"""
         return [str(x) for x in self.ip_set]
 
+    @cached_property
+    def ip_set_full_info(self):
+        """Iter sur les range cidr, et renvoie network, broacast , etc"""
+        return [
+            {
+                'network': str(ip_set.network),
+                'netmask': str(ip_set.netmask),
+                'netmask_cidr': str(ip_set.prefixlen),
+                'broadcast': str(ip_set.broadcast),
+                'vlan': str(self.vlan),
+                'vlan_id': self.vlan.vlan_id
+            } for ip_set in self.ip_set.iter_cidrs()
+        ]
+
+    @cached_property
+    def ip6_set_full_info(self):
+        if self.prefix_v6:
+            return {
+                'network' : str(self.prefix_v6),
+                'netmask' : 'ffff:ffff:ffff:ffff::',
+                'netmask_cidr' : str(self.prefix_v6_length),
+                'vlan': str(self.vlan),
+                'vlan_id': self.vlan.vlan_id
+            }
+        else:
+            return None
+
     def ip_objects(self):
         """ Renvoie tous les objets ipv4 relié à ce type"""
         return IpList.objects.filter(ip_type=self)
diff --git a/machines/templates/machines/aff_iptype.html b/machines/templates/machines/aff_iptype.html
index bee4669b..7d4de6c5 100644
--- a/machines/templates/machines/aff_iptype.html
+++ b/machines/templates/machines/aff_iptype.html
@@ -47,7 +47,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
             <td>{{ type.extension }}</td>
             <td>{{ type.need_infra|tick }}</td>
 	    <td>{{ type.domaine_ip_start }}-{{ type.domaine_ip_stop }}</td>
-	    <td>{{ type.prefix_v6 }}</td>
+            <td>{{ type.prefix_v6 }}/{{ type.prefix_v6_length }}</td>
 	    <td>{{ type.dnssec_reverse_v4|tick }}/{{ type.dnssec_reverse_v6|tick }}</td>
             <td>{{ type.vlan }}</td>
             <td>{{ type.ouverture_ports }}</td>