graph "1x2" {
	layout="neato";
	overlap="false";
	esep="+100";

        node [shape=record, fontname="DejaVu Sans Mono, Book"];
	edge [color="cornflowerblue", penwidth="2", fontname="DejaVu Serif, Book"];

	host [
	    label="host | { <mgmt> mgmt | <data> data }",
	    pos="0,20!",
	    requires="controller",
	];

        client [
	    label="{ <mgmt> mgmt | <data> data } | client",
	    pos="200,20!",
	    requires="infix",
	];

	host:mgmt -- client:mgmt [requires="mgmt", color=lightgrey]
	host:data -- client:data [color=black, taillabel="2001:db8::1/64", headlabel="2001:db8::42/128"]
}