diff --git a/libretroshare/src/tests/network_simulator/gui/gui.pro b/libretroshare/src/tests/network_simulator/gui/gui.pro
index 8add96fb3..4f4bd987a 100644
--- a/libretroshare/src/tests/network_simulator/gui/gui.pro
+++ b/libretroshare/src/tests/network_simulator/gui/gui.pro
@@ -8,6 +8,8 @@ INCLUDEPATH *= ../../.. ..
 TARGET = NetworkSim
 DESTDIR = bin
 
+PRE_TARGETDEPS = ../nscore/nscore.pro
+
 SOURCES = main.cpp NetworkViewer.cpp NetworkSimulatorGUI.cpp \
           TurtleRouterStatistics.cpp RsAutoUpdatePage.cpp 
 
diff --git a/libretroshare/src/tests/network_simulator/nscore/FakeComponents.h b/libretroshare/src/tests/network_simulator/nscore/FakeComponents.h
index 1fea8c479..b54ed8681 100644
--- a/libretroshare/src/tests/network_simulator/nscore/FakeComponents.h
+++ b/libretroshare/src/tests/network_simulator/nscore/FakeComponents.h
@@ -29,6 +29,7 @@ class FakePublisher: public pqiPublisher
 		virtual bool sendItem(RsRawItem *item) 
 		{
 			_item_queue.push_back(item) ;
+			return true ;
 		}
 
 		RsRawItem *outgoing() 
diff --git a/libretroshare/src/tests/network_simulator/nscore/MonitoredGRouterClient.cpp b/libretroshare/src/tests/network_simulator/nscore/MonitoredGRouterClient.cpp
new file mode 100644
index 000000000..f1fbe333a
--- /dev/null
+++ b/libretroshare/src/tests/network_simulator/nscore/MonitoredGRouterClient.cpp
@@ -0,0 +1,24 @@
+#include "MonitoredGRouterClient.h"
+
+const uint32_t MonitoredGRouterClient::GROUTER_CLIENT_SERVICE_ID_00 = 0x0111 ;
+
+void MonitoredGRouterClient::receiveGRouterData(const GRouterKeyId& destination_key,const RsGRouterGenericDataItem *item)
+{
+	std::cerr << "received one global grouter item for key " << destination_key << std::endl;
+}
+
+void MonitoredGRouterClient::provideKey(const GRouterKeyId& key_id)
+{
+	_grouter->registerKey(key_id,GROUTER_CLIENT_SERVICE_ID_00,"test grouter address") ;
+
+	std::cerr << "Registered new key " << key_id << " for service " << std::hex << GROUTER_CLIENT_SERVICE_ID_00 << std::dec << std::endl;
+}
+
+void MonitoredGRouterClient::sendMessage(const GRouterKeyId& destination_key_id) const
+{
+	RsGRouterGenericDataItem *item = new RsGRouterGenericDataItem ;
+	item->data_size = 1000 + (RSRandom::random_u32()%1000) ;
+	item->data_bytes = (unsigned char *)malloc(item->data_size) ;
+
+	_grouter->sendData(destination_key_id,item) ;
+}
diff --git a/libretroshare/src/tests/network_simulator/nscore/MonitoredGRouterClient.h b/libretroshare/src/tests/network_simulator/nscore/MonitoredGRouterClient.h
new file mode 100644
index 000000000..a778c8c37
--- /dev/null
+++ b/libretroshare/src/tests/network_simulator/nscore/MonitoredGRouterClient.h
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <grouter/grouterclientservice.h>
+
+class MonitoredGRouterClient: public GRouterClientService
+{
+	public:
+		static const uint32_t GROUTER_CLIENT_SERVICE_ID_00 ;
+
+		// Derived from grouterclientservice.h
+		//
+		virtual void connectToGlobalRouter(p3GRouter *p) { _grouter = p ; p->registerClientService(GROUTER_CLIENT_SERVICE_ID_00,this) ; }
+		virtual void receiveGRouterData(const GRouterKeyId& destination_key,const RsGRouterGenericDataItem *item);
+
+		// Own functionality
+		//
+		void sendMessage(const GRouterKeyId& destination_key) const ;
+		void provideKey(const GRouterKeyId& key) ;
+
+	private:
+		p3GRouter *_grouter ;
+};
+
diff --git a/libretroshare/src/tests/network_simulator/nscore/MonitoredTurtle.cpp b/libretroshare/src/tests/network_simulator/nscore/MonitoredTurtleClient.cpp
similarity index 92%
rename from libretroshare/src/tests/network_simulator/nscore/MonitoredTurtle.cpp
rename to libretroshare/src/tests/network_simulator/nscore/MonitoredTurtleClient.cpp
index 4de7bec6b..3ed946ac3 100644
--- a/libretroshare/src/tests/network_simulator/nscore/MonitoredTurtle.cpp
+++ b/libretroshare/src/tests/network_simulator/nscore/MonitoredTurtleClient.cpp
@@ -1,4 +1,4 @@
-#include "MonitoredTurtle.h"
+#include "MonitoredTurtleClient.h"
 
 bool MonitoredTurtleClient::handleTunnelRequest(const TurtleFileHash& hash,const RsPeerId& peer_id)
 {
diff --git a/libretroshare/src/tests/network_simulator/nscore/MonitoredTurtle.h b/libretroshare/src/tests/network_simulator/nscore/MonitoredTurtleClient.h
similarity index 100%
rename from libretroshare/src/tests/network_simulator/nscore/MonitoredTurtle.h
rename to libretroshare/src/tests/network_simulator/nscore/MonitoredTurtleClient.h
diff --git a/libretroshare/src/tests/network_simulator/nscore/Network.cpp b/libretroshare/src/tests/network_simulator/nscore/Network.cpp
index 7164d3f47..003eca98f 100644
--- a/libretroshare/src/tests/network_simulator/nscore/Network.cpp
+++ b/libretroshare/src/tests/network_simulator/nscore/Network.cpp
@@ -15,7 +15,7 @@
 #include <ft/ftcontroller.h>
 #include <services/p3service.h>
 #include "Network.h"
-#include "MonitoredTurtle.h"
+#include "MonitoredTurtleClient.h"
 #include "FakeComponents.h"
 
 bool Network::initRandom(uint32_t nb_nodes,float connexion_probability)
diff --git a/libretroshare/src/tests/network_simulator/nscore/PeerNode.cpp b/libretroshare/src/tests/network_simulator/nscore/PeerNode.cpp
index 9a944565d..e5dfe0575 100644
--- a/libretroshare/src/tests/network_simulator/nscore/PeerNode.cpp
+++ b/libretroshare/src/tests/network_simulator/nscore/PeerNode.cpp
@@ -1,6 +1,7 @@
 #include "PeerNode.h"
 #include "FakeComponents.h"
-#include "MonitoredTurtle.h"
+#include "MonitoredTurtleClient.h"
+#include "MonitoredGRouterClient.h"
 
 PeerNode::PeerNode(const RsPeerId& id,const std::list<RsPeerId>& friends)
 	: _id(id)
@@ -15,20 +16,24 @@ PeerNode::PeerNode(const RsPeerId& id,const std::list<RsPeerId>& friends)
 
 	_service_server = new p3ServiceServer(_publisher,ctrl);
 
-	ftServer *ft_server = new ftServer(peer_mgr,ctrl) ;
-
-    _service_server->addService(_turtle = new p3turtle(ctrl,link_mgr),true) ;
-
-    _ftserver = new MonitoredTurtleClient ;
-    _ftserver->connectToTurtleRouter(_turtle) ;
-
     RsServicePermissions perms;
     perms.mDefaultAllowed = true ;
     perms.mServiceId = RS_SERVICE_TYPE_TURTLE ;
 
     ctrl->updateServicePermissions(RS_SERVICE_TYPE_TURTLE,perms) ;
-	// add a turtle router.
+
+	// Turtle business
+
+	_service_server->addService(_turtle = new p3turtle(ctrl,link_mgr),true) ;
+	_turtle_client = new MonitoredTurtleClient ;
+	_turtle_client->connectToTurtleRouter(_turtle) ;
+
+	// global router business.
 	//
+
+	_service_server->addService(_grouter = new p3GRouter(ctrl,link_mgr),true) ;
+	_grouter_client = new MonitoredGRouterClient ;
+	_grouter_client->connectToGlobalRouter(_grouter) ;
 }
 
 PeerNode::~PeerNode()
@@ -54,13 +59,13 @@ RsRawItem *PeerNode::outgoing()
 void PeerNode::provideFileHash(const RsFileHash& hash)
 {
 	_provided_hashes.insert(hash) ;
-    _ftserver->provideFileHash(hash) ;
+    _turtle_client->provideFileHash(hash) ;
 }
 
 void PeerNode::manageFileHash(const RsFileHash& hash)
 {
 	_managed_hashes.insert(hash) ;
-	_turtle->monitorTunnels(hash,_ftserver) ;
+	_turtle->monitorTunnels(hash,_turtle_client) ;
 }
 
 void PeerNode::getTrafficInfo(NodeTrafficInfo& info)
diff --git a/libretroshare/src/tests/network_simulator/nscore/PeerNode.h b/libretroshare/src/tests/network_simulator/nscore/PeerNode.h
index f047dfedc..d49193941 100644
--- a/libretroshare/src/tests/network_simulator/nscore/PeerNode.h
+++ b/libretroshare/src/tests/network_simulator/nscore/PeerNode.h
@@ -3,10 +3,11 @@
 #include <retroshare/rstypes.h>
 #include <turtle/p3turtle.h>
 
-class MonitoredTurtleRouter ;
 class MonitoredTurtleClient ;
+class MonitoredGRouterClient ;
 class RsTurtle ;
 class p3turtle ;
+class p3GRouter ;
 class pqiPublisher ;
 class RsRawItem ;
 class p3ServiceServer ;
@@ -30,10 +31,10 @@ class PeerNode
 
 		void tick() ;
 
-		const RsTurtle *turtle_service() const { return _turtle ; }
-
 		// Turtle-related methods
 		//
+		const RsTurtle *turtle_service() const { return _turtle ; }
+
 		void manageFileHash(const RsFileHash& hash) ;
 		void provideFileHash(const RsFileHash& hash) ;
 
@@ -42,13 +43,23 @@ class PeerNode
 
 		void getTrafficInfo(NodeTrafficInfo& trinfo) ;	// 
 
+		// GRouter-related methods
+		//
 	private:
 		p3ServiceServer *_service_server ;
-		p3turtle *_turtle ;
-		MonitoredTurtleClient *_ftserver ;
 		pqiPublisher *_publisher ;
 		RsPeerId _id ;
 
+		// turtle stuff
+		//
+		p3turtle *_turtle ;
+		MonitoredTurtleClient *_turtle_client ;
+
+		// grouter stuff
+		//
+		p3GRouter *_grouter ;
+		MonitoredGRouterClient *_grouter_client ;
+
 		std::set<RsFileHash> _provided_hashes ;
 		std::set<RsFileHash> _managed_hashes ;
 };
diff --git a/libretroshare/src/tests/network_simulator/nscore/core.pro b/libretroshare/src/tests/network_simulator/nscore/nscore.pro
similarity index 58%
rename from libretroshare/src/tests/network_simulator/nscore/core.pro
rename to libretroshare/src/tests/network_simulator/nscore/nscore.pro
index 7c2b39623..5a3989a15 100644
--- a/libretroshare/src/tests/network_simulator/nscore/core.pro
+++ b/libretroshare/src/tests/network_simulator/nscore/nscore.pro
@@ -8,11 +8,13 @@ TARGET = nscore
 SOURCES = Network.cpp \
 			 PeerNode.cpp \
           MonitoredRsPeers.cpp \
-			 MonitoredTurtle.cpp
+			 MonitoredTurtleClient.cpp \
+			 MonitoredGRouterClient.cpp
 
 HEADERS = Network.h \
 			 PeerNode.h \
-			 MonitoredTurtle.h  \
-          MonitoredRsPeers.h
+          MonitoredRsPeers.h \
+			 MonitoredTurtleClient.h  \
+			 MonitoredGRouterClient.h
 
 DESTDIR = ../lib