--- a/src/applications/udp-echo/udp-echo-server.cc	Thu Jun 04 08:41:15 2009 +0200
+++ b/src/applications/udp-echo/udp-echo-server.cc	Thu Jun 04 08:41:27 2009 +0200
@@ -122,6 +122,7 @@
             address.GetIpv4());
 
           packet->RemoveAllPacketTags ();
+          packet->RemoteAllByteTags ();
 
           NS_LOG_LOGIC ("Echoing packet");
           socket->SendTo (packet, 0, from);