// the first channel will discard the unicast messages with seqno #3 two times, the let them pass down
ProtocolStack stack=a.getProtocolStack();
Protocol neighbor=stack.findProtocol(Util.getUnicastProtocols());
System.out.println("Found unicast protocol " + neighbor.getClass().getSimpleName());
stack.insertProtocolInStack(discard,neighbor,ProtocolStack.BELOW);
a.connect("UNICAST_OOB_Test");
b.connect("UNICAST_OOB_Test");
Util.waitUntilAllChannelsHaveSameSize(10000, 1000, a,b);