diff --git a/group_vars/all/network_interfaces.yml b/group_vars/all/network_interfaces.yml
index a44f860b..3d533147 100644
--- a/group_vars/all/network_interfaces.yml
+++ b/group_vars/all/network_interfaces.yml
@@ -13,6 +13,10 @@ glob_network_interfaces:
       id: 4
       extra:
         - "mtu 9000"
+    - name: zef
+      id: 5
+      extra:
+        - "mtu 9000"
     - name: adm
       id: 10
       dns: "{{ query('ldap', 'ip4', 'romanesco', 'adm') }}"
diff --git a/host_vars/apprentis.adm.crans.org.yml b/host_vars/apprentis.adm.crans.org.yml
new file mode 100644
index 00000000..dc2ef382
--- /dev/null
+++ b/host_vars/apprentis.adm.crans.org.yml
@@ -0,0 +1,3 @@
+---
+interfaces:
+  adm: ens18
diff --git a/host_vars/kameron.adm.crans.org.yml b/host_vars/kameron.adm.crans.org.yml
index 9c85efa9..3d66644f 100644
--- a/host_vars/kameron.adm.crans.org.yml
+++ b/host_vars/kameron.adm.crans.org.yml
@@ -2,3 +2,4 @@
 interfaces:
   adm: ens18
   san: ens19
+  zef: ens20
diff --git a/host_vars/otter.adm.crans.org.yml b/host_vars/otter.adm.crans.org.yml
index 9c85efa9..3d66644f 100644
--- a/host_vars/otter.adm.crans.org.yml
+++ b/host_vars/otter.adm.crans.org.yml
@@ -2,3 +2,4 @@
 interfaces:
   adm: ens18
   san: ens19
+  zef: ens20
diff --git a/host_vars/routeur-2754.adm.crans.org.yml b/host_vars/routeur-2754.adm.crans.org.yml
new file mode 100644
index 00000000..ca63d9f8
--- /dev/null
+++ b/host_vars/routeur-2754.adm.crans.org.yml
@@ -0,0 +1,4 @@
+---
+interfaces:
+  adm: ens18
+  srv: ens21
diff --git a/host_vars/tealch.adm.crans.org.yml b/host_vars/tealch.adm.crans.org.yml
index 9c85efa9..3d66644f 100644
--- a/host_vars/tealch.adm.crans.org.yml
+++ b/host_vars/tealch.adm.crans.org.yml
@@ -2,3 +2,4 @@
 interfaces:
   adm: ens18
   san: ens19
+  zef: ens20
diff --git a/hosts b/hosts
index a9df71db..0382ff44 100644
--- a/hosts
+++ b/hosts
@@ -305,6 +305,7 @@ virtu
 viarezo_physical
 
 [crans_vm]
+apprentis.adm.crans.org
 belenios.adm.crans.org
 boeing.adm.crans.org
 cas.adm.crans.org