diff --git a/hosts/carbon/configuration.nix b/hosts/carbon/configuration.nix
index 338a3b2..6cd4811 100644
--- a/hosts/carbon/configuration.nix
+++ b/hosts/carbon/configuration.nix
@@ -99,7 +99,12 @@
     enable = true;
     settings = {
       interfaces-config = {
-        interfaces = [ "enp1s0.204" ];
+        interfaces = [ "enp1s0.201" "enp1s0.204" ];
+      };
+      lease-database = {
+        name = "/var/lib/kea/dhcp4.leases";
+        persist = true;
+        type = "memfile";
       };
       option-def = [
         {
@@ -141,7 +146,33 @@
         }
       ];
       subnet4 = [
+        # Heimnetz
         {
+          id = 201;
+          subnet = "10.152.4.0/24";
+          pools = [
+            {
+              pool = "10.152.4.100 - 10.152.4.240";
+            }
+          ];
+          option-data = [
+            {
+              name = "routers";
+              data = "10.152.4.1";
+            }
+            {
+              name = "domain-name-servers";
+              data = "10.152.0.1";
+            }
+            {
+              name = "domain-name";
+              data = "net.clerie.de";
+            }
+          ];
+        }
+        # VoIP
+        {
+          id = 204;
           subnet = "10.152.33.0/24";
           pools = [
             {