Additional bridge/interface config.

hosts/router/default.nix

@@ -46,6 +46,24 @@
         ];
       };
     };
+    interfaces = {
+      "wan" = {
+        useDHCP = true;
+        tempAddresses = "disabled";
+      };
+      "lan" = {
+        ipv4.addresses = [
+          {
+            address = "192.168.0.1";
+            prefixLength = 16;
+          }
+        ];
+        useDHCP = false;
+        # macAddress = "AA:BB:CC:DD:EE:FF";
+        # ^ This is the MAC address of the bridge. It's important to set this
+        # so that the bridge has a predictable MAC address.
+      };
+    };
     nat = {
       enable = true;
       externalInterface = "wan";