diff --git a/ops/nixos/swann/default.nix b/ops/nixos/swann/default.nix
index b30bba3293..59f4c49004 100644
--- a/ops/nixos/swann/default.nix
+++ b/ops/nixos/swann/default.nix
@@ -797,5 +797,174 @@ in {
       Storage=volatile
     '';
     systemd.services.tailscaled.environment.TS_LOGS_DIR = "/var/run/tailscale";
-  } ];
+  } (lib.mkIf (!config.services.erbium.enable) {
+    services.radvd = {
+      enable = true;
+      config = ''
+        interface br-internal {
+          AdvSendAdvert on;
+          AdvLinkMTU 1420;  # Wireguard
+          AdvManagedFlag on;
+
+          RDNSS 2a09:a443::1 {};
+          DNSSL house.as205479.net {};
+
+          prefix 2a09:a443::/64 {
+            AdvOnLink on;
+            AdvAutonomous on;
+          };
+          prefix 2a09:a443:1::/48 {
+            AdvOnLink on;
+            AdvAutonomous off;
+          };
+        };
+        interface vl-eduroam {
+          AdvSendAdvert on;
+          AdvLinkMTU 1420;  # Wireguard
+          AdvManagedFlag on;
+
+          RDNSS 2a09:a443:2::1 {};
+          DNSSL eduroam.as205479.net {};
+
+          prefix 2a09:a443:2::/64 {
+            AdvOnLink on;
+            AdvAutonomous on;
+          };
+          prefix 2a09:a443:3::/48 {
+            AdvOnLink on;
+            AdvAutonomous off;
+          };
+        };
+      '';
+    };
+
+    services.kea = {
+      dhcp4.enable = true;
+      dhcp4.settings = {
+        interfaces-config.interfaces = ["br-internal" "vl-eduroam"];
+        lease-database = {
+          type = "memfile";
+          persist = true;
+          name = "/var/lib/kea/dhcp4.leases";
+        };
+        reservations-global = true;
+        reservations = [{
+          hw-address = "40:8d:5c:1f:e8:68";
+          ip-address = "192.168.1.40";
+          hostname = "totoro";
+        } {
+          hw-address = "52:54:00:cf:cd:94";
+          ip-address = "192.168.1.41";
+          hostname = "totoro-pfsense";
+        } {
+          hw-address = "00:0d:5d:1b:14:ba";
+          ip-address = "192.168.1.50";
+          hostname = "kvm";
+        } {
+          hw-address = "9c:93:4e:ad:1f:7b";
+          ip-address = "192.168.1.51";
+          hostname = "printer-xerox";
+        } {
+          hw-address = "bc:33:29:26:01:5c";
+          ip-address = "92.118.30.18";
+          hostname = "ps5";
+        } {
+          hw-address = "84:39:be:77:65:52";
+          ip-address = "192.168.1.60";
+          hostname = "qvmpc6552";
+        }];
+        subnet4 = [{
+          subnet = "192.168.1.0/24";
+          pools = [{
+            pool = "192.168.1.100 - 192.168.1.200";
+          }];
+          option-data = [{
+            name = "routers";
+            data = "192.168.1.1";
+          } {
+            name = "domain-name-servers";
+            data = "192.168.1.1";
+          } {
+            name = "domain-name";
+            data = "house.as205479.net";
+          } {
+            name = "interface-mtu";
+            data = "1420";
+          }];
+        } {
+          subnet = "92.118.30.16/28";
+          option-data = [{
+            name = "routers";
+            data = "92.118.30.17";
+          } {
+            name = "domain-name-servers";
+            data = "92.118.30.17";
+          } {
+            name = "domain-name";
+            data = "house-ext.as205479.net";
+          } {
+            name = "interface-mtu";
+            data = "1420";
+          }];
+        } {
+          subnet = "192.168.10.0/24";
+          pools = [{
+            pool = "192.168.10.100 - 192.168.10.200";
+          }];
+          option-data = [{
+            name = "routers";
+            data = "192.168.10.1";
+          } {
+            name = "domain-name-servers";
+            data = "192.168.10.1";
+          } {
+            name = "domain-name";
+            data = "eduroam.as205479.net";
+          } {
+            name = "interface-mtu";
+            data = "1420";
+          }];
+        }];
+      };
+
+      dhcp6.enable = true;
+      dhcp6.settings = {
+        interfaces-config.interfaces = ["br-internal" "vl-eduroam"];
+        lease-database = {
+          type = "memfile";
+          persist = true;
+          name = "/var/lib/kea/dhcp6.leases";
+        };
+        subnet6 = [{
+          subnet = "2a09:a443:1::/48";
+          pd-pools = [{
+            prefix = "2a09:a443:1:8000::";
+            prefix-len = 49;
+            delegated-len = 64;
+          }];
+          option-data = [{
+            name = "dns-servers";
+            data = "2a09:a443:1::1";
+          } {
+            name = "domain-search";
+            data = "house.as205479.net";
+          }];
+        } {
+          subnet = "2a09:a443:3::/48";
+          pd-pools = [{
+            prefix = "2a09:a443:3:8000::";
+            prefix-len = 49;
+            delegated-len = 64;
+          }];
+          option-data = [{
+            name = "dns-servers";
+            data = "2a09:a443:3::1";
+          } {
+            name = "domain-search";
+            data = "eduroam.as205479.net";
+          }];
+        }];
+      };
+    };
+  })];
 }