diff --git a/nix/lib/config/legacy.nix b/nix/lib/config/legacy.nix
index 0f8119f..481647f 100644
--- a/nix/lib/config/legacy.nix
+++ b/nix/lib/config/legacy.nix
@@ -48,6 +48,15 @@ in
     {
       core.ospf.secret = pillar.ospf.secret;
       pub.dynamicDomain = true;
+
+      c3d2.dhcp = {
+        server = "c3d2-gw3";
+        router = "c3d2-anon";
+        start = "172.22.99.100";
+        end = "172.22.99.199";
+        time = 86400;
+        max-time = 30 * 86400;
+      };
     }
 
     # net priv* settings