diff --git a/machines/kat-r86s/router.nix b/machines/kat-r86s/router.nix
index 397e88e..65336b2 100644
--- a/machines/kat-r86s/router.nix
+++ b/machines/kat-r86s/router.nix
@@ -11,19 +11,66 @@
     ipv4.addresses = [{ address = "192.168.42.1"; prefixLength = 24; }];
   };
 
-  networking.interfaces.enp3s0 = {
-    useDHCP = false;
-    ipv4.addresses = [{ address = "192.168.222.1"; prefixLength = 24; }];
-    ipv6.addresses = [{ address = "fd26:baf9:d250:8000::ffff"; prefixLength = 64; }];
-  };
+#  networking.interfaces.enp3s0 = {
+#    useDHCP = false;
+#    ipv4.addresses = [{ address = "192.168.222.1"; prefixLength = 24; }];
+#    ipv6.addresses = [{ address = "fd26:baf9:d250:8000::ffff"; prefixLength = 64; }];
+#  };
 
   services.dnsmasq = {
     enable = true;
     settings = {
-      interface = [ "enp3s0" ];
+      interface = [ "vlan-admin" ];
       bind-dynamic = true;
       dhcp-option = "3,0.0.0.0";
       dhcp-range = "192.168.222.100,192.168.222.254,255.255.255.0,infinite";
     };
   };
+
+  systemd.network = {
+    enable = true;
+    networks = {
+      "10-enp3s0" = {
+        name = "enp3s0";
+        networkConfig = {
+          VLAN = [ "vlan-admin" "vlan-user-test" ];
+
+          LinkLocalAddressing = false;
+          LLDP = false;
+          EmitLLDP = false;
+          IPv6AcceptRA = false;
+          IPv6SendRA = false;
+        };
+      };
+      "10-vlan-admin" = {
+        name = "vlan-admin";
+        address = [
+          "fd26:baf9:d250:8000::ffff/64"
+          "192.168.222.1/24"
+        ];
+      };
+      "10-vlan-user-test" = {
+        name = "vlan-user-test";
+        networkConfig = {
+          DHCP = "ipv4";
+        };
+      };
+    };
+    netdevs = {
+      "10-vlan-admin" = {
+        netdevConfig = {
+          Name = "vlan-admin";
+          Kind = "vlan";
+        };
+        vlanConfig.Id = 3000;
+      };
+      "10-vlan-user-test" = {
+        netdevConfig = {
+          Name = "vlan-user-test";
+          Kind = "vlan";
+        };
+        vlanConfig.Id = 4000;
+      };
+    };
+  };
 }