--- a
+++ b/src/CS/InteriorRouter.ned
@@ -0,0 +1,42 @@
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+// 
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see http://www.gnu.org/licenses/.
+// 
+
+package rina.CS;
+
+import rina.DIF.IPCProcess;
+
+
+module InteriorRouter
+{
+    @display("i=abstract/switch;bgb=282,227");
+    @node;
+    gates:
+        inout medium[];
+    submodules:
+        ipcProcess1: IPCProcess {
+            @display("p=65,145");
+        }
+        ipcProcess2: IPCProcess {
+            @display("p=205,145");
+        }
+        ipcProcess0: IPCProcess {
+            @display("p=135,48;i=,#FFB000");            
+        }
+    connections allowunconnected:
+        //ipcProcess0.southIo++ <--> ipcProcess1.northIo++;
+        //ipcProcess0.southIo++ <--> ipcProcess2.northIo++;
+        ipcProcess1.southIo++ <--> medium++;
+        ipcProcess2.southIo++ <--> medium++;
+}