diff --git a/Ipv6OverGeoNetworking/LibItsIpv6OverGeoNetworking_Functions.ttcn b/Ipv6OverGeoNetworking/LibItsIpv6OverGeoNetworking_Functions.ttcn
index dcafa15c3b63eb097465e7925fefa24491b78abd..a644661e0dc208f8000c30e63472fa2b67e99055 100644
--- a/Ipv6OverGeoNetworking/LibItsIpv6OverGeoNetworking_Functions.ttcn
+++ b/Ipv6OverGeoNetworking/LibItsIpv6OverGeoNetworking_Functions.ttcn
@@ -78,6 +78,80 @@ module LibItsIpv6OverGeoNetworking_Functions {
         
     } // end group ipv6OverGeoConfigurationFunctions
     
+    group ipv6OverGeoNwAltsteps {
+        
+        /**
+         * @desc IPv6 default.
+         */
+        altstep a_ipv6Default() runs on ItsNt {
+            
+            [] geoNetworkingPort.receive (
+                mw_geoNwInd(
+                    mw_geoNwPduWithPayload(
+                        mw_geoBroadcastHeaderWithNextHeader(?, ?, ?, e_ipv6),
+                        mw_ipv6Payload(
+                            mw_ipv6Packet(
+                                ?,
+                                ?,
+                                ?,
+                                mw_octetstringPayload(?)
+                            )
+                        )
+                    )
+                )
+            ) {
+                log("*** a_ipv6Default: INFO: Ignoring unsupported IPv6 packet ***");   
+                repeat; 
+            }
+            
+            [] geoNetworkingPort.receive (
+                mw_geoNwInd(
+                    mw_geoNwPduWithPayload(
+                        mw_geoBroadcastHeaderWithNextHeader(
+                            (
+                                mw_longPosVectorPosition_withDelta(f_getPosition(c_compNodeA)), 
+                                mw_longPosVectorPosition_withDelta(f_getPosition(c_compNodeB))
+                            ), 
+                            ?, 
+                            ?, 
+                            e_ipv6),
+                        mw_ipv6Payload(
+                            ?
+                        )
+                    )
+                )
+            ) {
+                log("*** a_ipv6Default: INFO: Ignoring rebroadcasted IPv6 packet ***");   
+                repeat; 
+            }
+            
+        } // end a_ipv6Default
+                 
+    } // end ipv6OverGeoNwAltsteps
+    
+    
+    group preambles {
+    
+        /**
+         * @desc Preamble for IPv6 neighbour nodes
+         */        
+        function f_prIpv6Neighbour() runs on ItsNt {
+            f_prNeighbour();
+            activate(a_ipv6Default());      
+        }	
+    	
+    } // end preambles
+    
+    group postambles {
+    
+        /**
+         * @desc Postamble for neighbour nodes
+         */          
+        function f_poIpv6Neighbour() runs on ItsNt {
+            f_poNeighbour();           
+        }            	
+    } // end postambles
+    
     group testAdapter {
         
         /**