diff --git a/proxmox/terraform/production/init.tf b/proxmox/terraform/production/init.tf
--- a/proxmox/terraform/production/init.tf
+++ b/proxmox/terraform/production/init.tf
@@ -6,3 +6,19 @@
     key                  = "production.rocquencourt.terraform.tfstate"
   }
 }
+
+locals {
+  config = {
+    dns                             = var.dns
+    domain                          = "internal.softwareheritage.org"
+    puppet_environment              = "production"
+    facter_deployment               = "production"
+    facter_subnet                   = "sesi_rocquencourt"
+    puppet_master                   = var.puppet_master
+    gateway_ip                      = "192.168.100.1"
+    user_admin                      = var.user_admin
+    user_admin_ssh_public_key       = var.user_admin_ssh_public_key
+    user_admin_ssh_private_key_path = var.user_admin_ssh_private_key_path
+    bridge  = "vmbr0"
+  }
+}
diff --git a/proxmox/terraform/production/production.tf b/proxmox/terraform/production/production.tf
--- a/proxmox/terraform/production/production.tf
+++ b/proxmox/terraform/production/production.tf
@@ -1,17 +1,3 @@
-locals {
-  config = {
-    dns                             = var.dns
-    domain                          = "internal.softwareheritage.org"
-    puppet_environment              = "production"
-    facter_deployment               = "production"
-    facter_subnet                   = "sesi_rocquencourt"
-    puppet_master                   = var.puppet_master
-    gateway_ip                      = "192.168.100.1"
-    user_admin                      = var.user_admin
-    user_admin_ssh_public_key       = var.user_admin_ssh_public_key
-    user_admin_ssh_private_key_path = var.user_admin_ssh_private_key_path
-  }
-}
 
 module "kelvingrove" {
   source = "../modules/node"
@@ -30,7 +16,7 @@
     ip      = "192.168.100.106"
     gateway = local.config["gateway_ip"]
     macaddr = "72:55:5E:58:01:0B"
-    bridge  = "vmbr0"
+    bridge  = local.config["bridge"]
   }]
 }
 
@@ -49,7 +35,7 @@
     ip      = "192.168.100.71"
     gateway = local.config["gateway_ip"]
     macaddr = "06:FF:02:95:31:CF"
-    bridge  = "vmbr0"
+    bridge  = local.config["bridge"]
   }]
 }
 
@@ -68,7 +54,7 @@
     ip      = "192.168.100.85"
     gateway = local.config["gateway_ip"]
     macaddr = "3E:46:D3:88:44:F4"
-    bridge  = "vmbr0"
+    bridge  = local.config["bridge"]
   }]
 }
 
@@ -87,7 +73,7 @@
     ip      = "192.168.100.95"
     gateway = local.config["gateway_ip"]
     macaddr = "26:8E:7F:D1:F7:99"
-    bridge  = "vmbr0"
+    bridge  = local.config["bridge"]
   }]
 }
 
@@ -108,7 +94,7 @@
     ip      = "192.168.100.43"
     gateway = local.config["gateway_ip"]
     macaddr = "36:E0:2D:70:7C:52"
-    bridge  = "vmbr0"
+    bridge  = local.config["bridge"]
   }]
 }
 
@@ -129,7 +115,7 @@
     ip      = "192.168.100.44"
     gateway = local.config["gateway_ip"]
     macaddr = "C6:29:D9:ED:9C:6B"
-    bridge  = "vmbr0"
+    bridge  = local.config["bridge"]
   }]
 }
 
@@ -154,7 +140,7 @@
     ip      = "192.168.100.111"
     gateway = local.config["gateway_ip"]
     macaddr = null
-    bridge  = "vmbr0"
+    bridge  = local.config["bridge"]
   }]
 }
 
@@ -176,7 +162,7 @@
     ip      = "192.168.100.90"
     gateway = local.config["gateway_ip"]
     macaddr = "B2:E5:3F:E2:77:13"
-    bridge  = "vmbr0"
+    bridge  = local.config["bridge"]
   }]
 }