diff --git a/modules/clan/gw-router/default.nix b/modules/clan/gw-router/default.nix
index 0a5beea..b39a569 100644
--- a/modules/clan/gw-router/default.nix
+++ b/modules/clan/gw-router/default.nix
@@ -261,7 +261,21 @@
                   ];
                   linkConfig.RequiredForOnline = "no";
                 }
-              ) settings.accessPorts;
+              ) settings.accessPorts
+              // lib.mapAttrs' (
+                name: vlan:
+                lib.nameValuePair "40-${vlanIf name}" {
+                  matchConfig.Name = vlanIf name;
+                  address = [ "${vlan.address}/${toString vlan.prefixLength}" ];
+                  networkConfig = {
+                    IPv6AcceptRA = false;
+                    IPv6SendRA = true;
+                    DHCPPrefixDelegation = true;
+                  };
+                  dhcpPrefixDelegationConfig.SubnetId = "auto";
+                  linkConfig.RequiredForOnline = "no";
+                }
+              ) settings.vlans;
 
             environment.systemPackages = with pkgs; [
               tcpdump