diff --git a/data/grid5000/sites/rennes/network_equipments/gw.json b/data/grid5000/sites/rennes/network_equipments/gw.json
index 99a36c2347d7c42ca4e83e58733e9036873aacd3..bd99915062b190137d6baaebe99ddec1d7f756a0 100644
--- a/data/grid5000/sites/rennes/network_equipments/gw.json
+++ b/data/grid5000/sites/rennes/network_equipments/gw.json
@@ -263,5 +263,5 @@
       "name": "kavlan-16"
     }
   },
-  "warranty": null
+  "warranty": "2048-05"
 }
\ No newline at end of file
diff --git a/data/grid5000/sites/rennes/network_equipments/sw-1.json b/data/grid5000/sites/rennes/network_equipments/sw-1.json
index b2687a60e9453f04e4c30922e99448f04a5890e2..9a43061fc925aa4e4348da1437de9d8bc3b28aaf 100644
--- a/data/grid5000/sites/rennes/network_equipments/sw-1.json
+++ b/data/grid5000/sites/rennes/network_equipments/sw-1.json
@@ -137,5 +137,5 @@
   "snmp_community": "public",
   "type": "network_equipment",
   "uid": "sw-1",
-  "warranty": null
+  "warranty": "2048-05"
 }
\ No newline at end of file
diff --git a/data/grid5000/sites/rennes/servers/srv-1.json b/data/grid5000/sites/rennes/servers/srv-1.json
index 80fdbd21a0dbce232f8242b99128bae4267d2a29..27b04bf0f177fd2e2fd49329c5d46dd607b26413 100644
--- a/data/grid5000/sites/rennes/servers/srv-1.json
+++ b/data/grid5000/sites/rennes/servers/srv-1.json
@@ -14,5 +14,5 @@
   "serial": "CZJ3151FJV",
   "type": "server",
   "uid": "srv-1",
-  "warranty": "YYYY-MM"
+  "warranty": "2030-15"
 }
\ No newline at end of file
diff --git a/data/grid5000/sites/rennes/servers/srv-2.json b/data/grid5000/sites/rennes/servers/srv-2.json
index 041916421e525cff82d83bf524e320cdf0094022..dd408e7cea08ce53e9f488809cba1234c0f8fb0d 100644
--- a/data/grid5000/sites/rennes/servers/srv-2.json
+++ b/data/grid5000/sites/rennes/servers/srv-2.json
@@ -14,5 +14,5 @@
   "serial": "CZJ3151FJT",
   "type": "server",
   "uid": "srv-2",
-  "warranty": "YYYY-MM"
+  "warranty": "2030-15"
 }
\ No newline at end of file
diff --git a/data/grid5000/sites/rennes/servers/srv-3.json b/data/grid5000/sites/rennes/servers/srv-3.json
index 5e878a50771053f5a21d70abf63d537ee5aadba0..b6f6923d12bfd9d8a9fc684b2823cceb1a43ef64 100644
--- a/data/grid5000/sites/rennes/servers/srv-3.json
+++ b/data/grid5000/sites/rennes/servers/srv-3.json
@@ -14,5 +14,5 @@
   "serial": "CZJ3151FJS",
   "type": "server",
   "uid": "srv-3",
-  "warranty": "YYYY-MM"
+  "warranty": "2030-15"
 }
\ No newline at end of file
diff --git a/data/grid5000/sites/rennes/servers/srv-data.json b/data/grid5000/sites/rennes/servers/srv-data.json
index d651b46aa2c8a9c3aefc12baf34ec071c7740e06..f1914b345e235547b07183759007c492ae1453c0 100644
--- a/data/grid5000/sites/rennes/servers/srv-data.json
+++ b/data/grid5000/sites/rennes/servers/srv-data.json
@@ -14,5 +14,5 @@
   "serial": "CZ231508CW",
   "type": "server",
   "uid": "srv-data",
-  "warranty": "YYYY-MM"
+  "warranty": null
 }
\ No newline at end of file
diff --git a/data/grid5000/sites/rennes/servers/srv-data2.json b/data/grid5000/sites/rennes/servers/srv-data2.json
index b44282ff6c7f9d74d259b62ad8cf1543fcc075d4..0de50afcdf5438c8e07a8bd98dfc424f3fab77a4 100644
--- a/data/grid5000/sites/rennes/servers/srv-data2.json
+++ b/data/grid5000/sites/rennes/servers/srv-data2.json
@@ -19,5 +19,5 @@
   "serial": "CZ23160DF7",
   "type": "server",
   "uid": "srv-data2",
-  "warranty": "YYYY-MM"
+  "warranty": "2008-05"
 }
\ No newline at end of file
diff --git a/input/grid5000/sites/rennes/networks/gw-rennes.yaml b/input/grid5000/sites/rennes/networks/gw-rennes.yaml
index 0c6444d768541910ab4bea6348d90ccb52f3d686..2204eee70db87e9dd301685d2dc4b044ff09ccee 100644
--- a/input/grid5000/sites/rennes/networks/gw-rennes.yaml
+++ b/input/grid5000/sites/rennes/networks/gw-rennes.yaml
@@ -1,7 +1,7 @@
 ---
 gw:
   model: Aruba 8325-48Y8C
-  warranty: 
+  warranty: 2048-05
   kind: router
   managed_by_us: true
   site: rennes
diff --git a/input/grid5000/sites/rennes/networks/sw-1.yaml b/input/grid5000/sites/rennes/networks/sw-1.yaml
index bd8922a9ace85f14ac7278dff19aedafd9188fdf..644e6718c244323b7751f0f3cd5abad231a0ec1a 100644
--- a/input/grid5000/sites/rennes/networks/sw-1.yaml
+++ b/input/grid5000/sites/rennes/networks/sw-1.yaml
@@ -1,7 +1,7 @@
 ---
 sw-1:
   model: Aruba 8325-48Y8C
-  warranty:
+  warranty: 2048-05
   kind: switch
   managed_by_us: true
   site: rennes
diff --git a/input/grid5000/sites/rennes/servers/servers.yaml b/input/grid5000/sites/rennes/servers/servers.yaml
index 8e7fe106e76f81d33023f1b33681a7fc7103560f..67dce9b1335d66451237b8f7220cc592b48b0d75 100644
--- a/input/grid5000/sites/rennes/servers/servers.yaml
+++ b/input/grid5000/sites/rennes/servers/servers.yaml
@@ -160,7 +160,7 @@ parasilo-srv-3:
 srv-1:
   kind: physical
   alias: []
-  warranty: YYYY-MM
+  warranty: 2030-15
   serial: CZJ3151FJV
   network_adapters:
     default:
@@ -171,7 +171,7 @@ srv-1:
 srv-2:
   kind: physical
   alias: []
-  warranty: YYYY-MM
+  warranty: 2030-15
   serial: CZJ3151FJT
   network_adapters:
     default:
@@ -182,7 +182,7 @@ srv-2:
 srv-3:
   kind: physical
   alias: []
-  warranty: YYYY-MM
+  warranty: 2030-15
   serial: CZJ3151FJS
   network_adapters:
     default:
@@ -193,7 +193,7 @@ srv-3:
 srv-data:
   kind: physical
   alias: []
-  warranty: YYYY-MM
+  warranty:
   serial: CZ231508CW
   network_adapters:
     default:
@@ -204,7 +204,7 @@ srv-data:
 srv-data2:
   kind: physical
   alias: [storage2]
-  warranty: YYYY-MM
+  warranty: 2008-05
   serial: CZ23160DF7
   network_adapters:
     default: