Working bridge configuration using systemd-networkd

hosts/nixos-server-test/default.nix

@@ -36,16 +36,39 @@
 
   services.proxmox-ve = {
     enable = true;
-    ipAddress = "192.168.122.42";
+    ipAddress = "192.168.122.71";
 
     # Make vmbr0 bridge visible in Proxmox web interface
     bridges = [ "vmbr0" ];
   };
 
-  # Actually set up the vmbr0 bridge
-  networking = {
-    bridges.vmbr0.interfaces = [ "enp1s0" ];
-    interfaces.vmbr0.useDHCP = lib.mkDefault true;
+  networking.useDHCP = false;
+
+  systemd.network = {
+    enable = true;
+
+    networks."10-lan" = {
+      matchConfig.Name = [ "enp1s0" ];
+      networkConfig = {
+        Bridge = "vmbr0";
+      };
+    };
+
+    netdevs."vmbr0" = {
+      netdevConfig = {
+        Name = "vmbr0";
+        Kind = "bridge";
+      };
+    };
+
+    networks."10-lan-bridge" = {
+      matchConfig.Name = "vmbr0";
+      networkConfig = {
+        IPv6AcceptRA = true;
+        DHCP = "ipv4";
+      };
+      linkConfig.RequiredForOnline = "routable";
+    };
   };
 
   # This option defines the first version of NixOS you have installed on this particular machine,