diff --git a/data/grid5000/sites/rennes/network_equipments/gw.json b/data/grid5000/sites/rennes/network_equipments/gw.json
index 3ecebcf5163869f548fd71ccc21ba2ec4f5f5bec..31c40e1eb26d35e0aa0701b00b9d99822d9d1c87 100644
--- a/data/grid5000/sites/rennes/network_equipments/gw.json
+++ b/data/grid5000/sites/rennes/network_equipments/gw.json
@@ -4,27 +4,27 @@
   ],
   "backplane_bps": 1440000000000,
   "channels": {
-    "lag1": {
+    "lag 1": {
       "kind": "switch",
-      "port": "lag1",
+      "port": "lag 1",
       "rate": 200000000000,
       "uid": "sw-1"
     },
-    "lag2": {
+    "lag 2": {
       "kind": "server",
-      "port": "lag2",
+      "port": "lag 2",
       "rate": 50000000000,
       "uid": "srv-data"
     },
-    "lag3": {
+    "lag 3": {
       "kind": "switch",
       "port": "port-channel286",
       "rate": 20000000000,
       "uid": "swcore-01-rba"
     },
-    "lag4": {
+    "lag 4": {
       "kind": "server",
-      "port": "lag4",
+      "port": "lag 4",
       "rate": 50000000000,
       "uid": "srv-data2"
     }
@@ -99,12 +99,12 @@
         {
           "kind": "channel",
           "snmp_name": "1/1/29",
-          "uid": "lag4"
+          "uid": "lag 4"
         },
         {
           "kind": "channel",
           "snmp_name": "1/1/30",
-          "uid": "lag4"
+          "uid": "lag 4"
         },
         {
           "kind": "server",
@@ -126,12 +126,12 @@
         {
           "kind": "channel",
           "snmp_name": "1/1/35",
-          "uid": "lag2"
+          "uid": "lag 2"
         },
         {
           "kind": "channel",
           "snmp_name": "1/1/36",
-          "uid": "lag2"
+          "uid": "lag 2"
         },
         {
         },
@@ -173,25 +173,25 @@
           "kind": "channel",
           "rate": 10000000000,
           "snmp_name": "1/1/47",
-          "uid": "lag3"
+          "uid": "lag 3"
         },
         {
           "kind": "channel",
           "rate": 10000000000,
           "snmp_name": "1/1/48",
-          "uid": "lag3"
+          "uid": "lag 3"
         },
         {
           "kind": "channel",
           "rate": 100000000000,
           "snmp_name": "1/1/49",
-          "uid": "lag1"
+          "uid": "lag 1"
         },
         {
           "kind": "channel",
           "rate": 100000000000,
           "snmp_name": "1/1/50",
-          "uid": "lag1"
+          "uid": "lag 1"
         }
       ],
       "rate": 25000000000,
diff --git a/data/grid5000/sites/rennes/network_equipments/sw-1.json b/data/grid5000/sites/rennes/network_equipments/sw-1.json
index d41cab7ba8080755d760db81ab2d114b22bba004..d3e20c4ad259f409e876e7f251e5a783f35a3edd 100644
--- a/data/grid5000/sites/rennes/network_equipments/sw-1.json
+++ b/data/grid5000/sites/rennes/network_equipments/sw-1.json
@@ -1,9 +1,9 @@
 {
   "backplane_bps": 1440000000000,
   "channels": {
-    "lag1": {
+    "lag 1": {
       "kind": "switch",
-      "port": "lag1",
+      "port": "lag 1",
       "rate": 200000000000,
       "uid": "gw"
     }
@@ -247,13 +247,13 @@
           "kind": "channel",
           "rate": 100000000000,
           "snmp_name": "1/1/49",
-          "uid": "lag1"
+          "uid": "lag 1"
         },
         {
           "kind": "channel",
           "rate": 100000000000,
           "snmp_name": "1/1/50",
-          "uid": "lag1"
+          "uid": "lag 1"
         }
       ],
       "rate": 25000000000,
diff --git a/data/grid5000/sites/rennes/network_equipments/swcore-01-rba.json b/data/grid5000/sites/rennes/network_equipments/swcore-01-rba.json
index 400c54178ec7a6873de0616d3b60043d5b18a836..da9e652d2d5909b7d231b155476e908b7a45d20e 100644
--- a/data/grid5000/sites/rennes/network_equipments/swcore-01-rba.json
+++ b/data/grid5000/sites/rennes/network_equipments/swcore-01-rba.json
@@ -2,7 +2,7 @@
   "channels": {
     "port-channel286": {
       "kind": "router",
-      "port": "lag3",
+      "port": "lag 3",
       "rate": 20000000000,
       "uid": "gw"
     },
diff --git a/data/grid5000/sites/toulouse/network_equipments/gw.json b/data/grid5000/sites/toulouse/network_equipments/gw.json
index a275d22424bbf4489ac4b078c4a7466a8b562d30..9d61d806337590d72fff047e2e8cb34460dc3799 100644
--- a/data/grid5000/sites/toulouse/network_equipments/gw.json
+++ b/data/grid5000/sites/toulouse/network_equipments/gw.json
@@ -3,13 +3,13 @@
     "gw-toulouse"
   ],
   "channels": {
-    "lag1": {
+    "lag 1": {
       "kind": "server",
       "port": "port-channel1",
       "rate": 20000000000,
       "uid": "nfs"
     },
-    "lag2": {
+    "lag 2": {
       "kind": "switch",
       "port": "lacp key 1",
       "rate": 20000000000,
@@ -99,12 +99,12 @@
         {
           "kind": "channel",
           "snmp_name": "1/1/15",
-          "uid": "lag2"
+          "uid": "lag 2"
         },
         {
           "kind": "channel",
           "snmp_name": "1/1/16",
-          "uid": "lag2"
+          "uid": "lag 2"
         },
         {
           "kind": "server",
@@ -119,12 +119,12 @@
         {
           "kind": "channel",
           "snmp_name": "1/1/19",
-          "uid": "lag1"
+          "uid": "lag 1"
         },
         {
           "kind": "channel",
           "snmp_name": "1/1/20",
-          "uid": "lag1"
+          "uid": "lag 1"
         }
       ],
       "rate": 10000000000,
diff --git a/data/grid5000/sites/toulouse/network_equipments/sw-estats.json b/data/grid5000/sites/toulouse/network_equipments/sw-estats.json
index 0d9d0a591040787895da9e87a01caba219371065..a05ab575cb158f31eff7667a01b989c3ea12eb88 100644
--- a/data/grid5000/sites/toulouse/network_equipments/sw-estats.json
+++ b/data/grid5000/sites/toulouse/network_equipments/sw-estats.json
@@ -5,7 +5,7 @@
   "channels": {
     "lacp key 1": {
       "kind": "router",
-      "port": "lag2",
+      "port": "lag 2",
       "rate": 20000000000,
       "uid": "gw"
     }
diff --git a/input/grid5000/sites/rennes/networks/gw-rennes.yaml b/input/grid5000/sites/rennes/networks/gw-rennes.yaml
index f5405ae6dd5f8db3328fa09769ea3deb92e5f91b..d2e87d570a4ec6cde4ec17f0ec207d1b716861e3 100644
--- a/input/grid5000/sites/rennes/networks/gw-rennes.yaml
+++ b/input/grid5000/sites/rennes/networks/gw-rennes.yaml
@@ -70,10 +70,10 @@ gw:
       rate: 25000000000
       ports:
         29:
-          uid: lag4
+          uid: lag 4
           kind: channel
         30:
-          uid: lag4
+          uid: lag 4
           kind: channel
         31:
           uid: srv-1
@@ -85,10 +85,10 @@ gw:
           uid: srv-3
           kind: server
         35:
-          uid: lag2
+          uid: lag 2
           kind: channel
         36:
-          uid: lag2
+          uid: lag 2
           kind: channel
         43:
           uid: sw-adm-1
@@ -107,39 +107,39 @@ gw:
           kind: backbone
           rate: 10000000000
         47:
-          uid: lag3
+          uid: lag 3
           kind: channel
           rate: 10000000000
         48:
-          uid: lag3
+          uid: lag 3
           kind: channel
           rate: 10000000000
         49:
-          uid: lag1
+          uid: lag 1
           kind: channel
           rate: 100000000000
         50:
-          uid: lag1
+          uid: lag 1
           kind: channel
           rate: 100000000000
   channels:
-    lag1:
+    lag 1:
       kind: switch
       rate: 200000000000
       uid: sw-1
-      port: lag1
-    lag2:
+      port: lag 1
+    lag 2:
       kind: server
       rate: 50000000000
       uid: srv-data
-      port: lag2
-    lag3:
+      port: lag 2
+    lag 3:
       kind: switch
       rate: 20000000000
       uid: swcore-01-rba
       port: port-channel286
-    lag4:
+    lag 4:
       kind: server
       rate: 50000000000
       uid: srv-data2
-      port: lag4
+      port: lag 4
diff --git a/input/grid5000/sites/rennes/networks/sw-1.yaml b/input/grid5000/sites/rennes/networks/sw-1.yaml
index defd51c5cdd9e1c39d166351766c6e6f1e63e9c2..5eec6ef290ab5a29d69035348f8de931571c80a7 100644
--- a/input/grid5000/sites/rennes/networks/sw-1.yaml
+++ b/input/grid5000/sites/rennes/networks/sw-1.yaml
@@ -80,16 +80,16 @@ sw-1:
         32:
           uid: paradoxe-32
         49:
-          uid: lag1
+          uid: lag 1
           kind: channel
           rate: 100000000000
         50:
-          uid: lag1
+          uid: lag 1
           kind: channel
           rate: 100000000000
   channels:
-    lag1:
+    lag 1:
       kind: switch
       rate: 200000000000
       uid: gw
-      port: lag1
+      port: lag 1
diff --git a/input/grid5000/sites/rennes/networks/swcore-01-rba.yaml b/input/grid5000/sites/rennes/networks/swcore-01-rba.yaml
index 2aea7f2d408d08e2f4ac3527bda9c094435afee5..ca49c4c379b3ce5f8c15fc8e2c8635a0001f46a9 100644
--- a/input/grid5000/sites/rennes/networks/swcore-01-rba.yaml
+++ b/input/grid5000/sites/rennes/networks/swcore-01-rba.yaml
@@ -51,5 +51,5 @@ swcore-01-rba:
     port-channel286:
       uid: gw
       kind: router
-      port: lag3
+      port: lag 3
       rate: 20000000000
diff --git a/input/grid5000/sites/toulouse/networks/gw.yaml b/input/grid5000/sites/toulouse/networks/gw.yaml
index c8b2280fd3555dd4863aa1ec8770bb254f9ba67a..223b052ad845993a22c1e70072bba11b0965f7c1 100644
--- a/input/grid5000/sites/toulouse/networks/gw.yaml
+++ b/input/grid5000/sites/toulouse/networks/gw.yaml
@@ -79,10 +79,10 @@ gw:
         9: montcalm-9
         10: montcalm-10
         15:
-          uid: lag2
+          uid: lag 2
           kind: channel
         16:
-          uid: lag2
+          uid: lag 2
           kind: channel
         17:
           uid: pve-1
@@ -91,18 +91,18 @@ gw:
           uid: pve-2
           kind: server
         19:
-          uid: lag1
+          uid: lag 1
           kind: channel
         20:
-          uid: lag1
+          uid: lag 1
           kind: channel
   channels:
-    lag1:
+    lag 1:
       uid: nfs
       kind: server
       rate: 20000000000
       port: port-channel1
-    lag2:
+    lag 2:
       uid: sw-estats
       kind: switch
       rate: 20000000000
diff --git a/input/grid5000/sites/toulouse/networks/sw-estats.yaml b/input/grid5000/sites/toulouse/networks/sw-estats.yaml
index 1d3d28c1c44f190e9255e19b09a9802fed3925cb..298870592cb9a355fce1242579df4c91057d32f8 100644
--- a/input/grid5000/sites/toulouse/networks/sw-estats.yaml
+++ b/input/grid5000/sites/toulouse/networks/sw-estats.yaml
@@ -43,4 +43,4 @@ sw-estats:
       uid: gw
       kind: router
       rate: 20000000000
-      port: lag2
+      port: lag 2