Updated networking config

lib/networking.nix

@@ -34,6 +34,46 @@
     };
   };
 
+  mkStaticSystemdNetwork = {interface, ip, router, nameserver}: {
+    # name = "enp0s31f6"; # Network interface name?
+    enable = true;
+
+    # See man systemd.link, man systemd.netdev, man systemd.network
+    matchConfig = {
+      # This corresponds to the [MATCH] section
+      Name = interface; # Match ethernet interface
+    };
+
+    # Static IP + DNS + Gateway
+    address = ip;
+    gateway = router;
+    dns = nameserver;
+
+    # routes = [
+      # {
+        # routeConfig.Gateway = (lib.head router);
+      # }
+    # ];
+
+    # See man systemd.network
+    networkConfig = {
+      # This corresponds to the [NETWORK] section
+      DHCP = "no";
+
+      # TODO: What does this all do?
+      # IPv6AcceptRA = true;
+      # MulticastDNS = "yes"; # Needed?
+      # LLMNR = "no"; # Needed?
+      # LinkLocalAddressing = "no"; # Needed?
+    };
+
+    linkConfig = {
+      # This corresponds to the [LINK] section
+      # RequiredForOnline = "routable";
+      RequiredForOnline = "no"; # Don't make nixos-rebuild wait for systemd-networkd-wait-online.service
+    };
+  };
+
   mkNetworkNamespace = name: ''
     ${pkgs.iproute}/bin/ip netns add ${name} # Create the Namespace
     ${pkgs.iproute}/bin/ip -n ${name} link set lo up # Enable the Loopback device