digraph messages {
	//concentrate=true;
	subgraph clusterclients {
		client1 [shape = box];
		client2 [shape = box];
		client3 [shape = box];

		style = dashed;
		label = "Clients";
	}

	subgraph clusternode1 {
		subgraph clusterc2s1 {
			c2s11;
			c2s12;
			style = invis;
		}
		subgraph clusterservices1 {
			service11;
			service12;
			service13;
			style = invis;
		}
		//subgraph clusters2s1 {
			//s2s11;
			//s2s12;
			//style = invis;
		//}
		c2s11     -> auth1;
		c2s12     -> auth1;
		auth1     -> c2s11;
		auth1     -> c2s12;
		c2s11     -> sm1;
		c2s11     -> router1;
		c2s12     -> sm1;
		c2s12     -> router1;
		router1   -> local1;
		router1   -> service11;
		router1   -> service12;
		router1   -> service13;
		router1   -> s2s11;
		router1   -> s2s12;
		service11 -> router1;
		service12 -> router1;
		service13 -> router1;
		s2s11     -> router1;
		s2s12     -> router1;
		local1    -> sm1;
		sm1       -> c2s11;
		sm1       -> c2s12;

		style = dashed;
		label = "Node1";
	}

	subgraph clusternode2 {
		c2s2      -> auth2;
		auth2     -> c2s2;
		c2s2      -> sm2;
		c2s2      -> router2;
		router2   -> local2;
		router2   -> service21;
		router2   -> s2s21;
		service21 -> router2;
		s2s21     -> router2;
		local2    -> sm2;
		sm2       -> c2s2;

		style = dashed;
		label = "Node2";
	}



	subgraph clusterservers {
		server1 [shape = box];
		server2 [shape = box];
		server3 [shape = box];

		style = dashed;
		label = "Servers";
	}


	client1 -> c2s11;
	client2 -> c2s12;
	client3 -> c2s2;
	c2s11 -> client1 [constraint=false];
	c2s12 -> client2 [constraint=false];
	c2s2  -> client3 [constraint=false];

	s2s11 -> server1 [minlen = 2];
	s2s12 -> server2 [minlen = 2];
	s2s21 -> server3 [minlen = 2];
	server1 -> s2s11 [constraint=false];
	server2 -> s2s12 [constraint=false];
	server3 -> s2s21 [constraint=false];

	router1 -> router2;
	router2 -> router1;
	sm1     -> sm2;
	sm2     -> sm1;

	label = "Data Flows";
}