diff --git a/config/switch.nix b/config/switch.nix
index c8c8e4d..509fb30 100644
--- a/config/switch.nix
+++ b/config/switch.nix
@@ -300,6 +300,8 @@
         up3.ports = [ "3" ];
         # unifiac-mesh
         ap57.ports = [ "10" ];
+        # dump-dvb traffic-stop-box
+        c3d2.ports = [ "20" ];
       };
     };
   };