graph "ospf-bfd" {
	layout="neato";
	overlap="false";
	esep="+20";
	size=10

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

        R1 [
	    label=" { { R1 | <slow> slow } | { <mgmt> mgmt | <h1> h1 | <fast> fast } }",
	    pos="0,6!",

	    requires="infix",
	];
	R2 [
	    label="{ { <slow> slow | R2 } | { <fast> fast | <h2> h2 | <mgmt> mgmt  } }",
	    pos="18,6!",

	    requires="infix",
	];

	PC [
	    label="{ { <R1mgmt> R1mgmt | <h1> h1 | <R1fast> R1fast | <R2fast> R2fast | <h2> h2 | <R2mgmt> R2mgmt } | PC }",
	    pos="9,0!",
	    requires="controller",
	];

	PC:R1mgmt -- R1:mgmt [requires="mgmt", color="lightgray"]
	PC:R2mgmt -- R2:mgmt [requires="mgmt", color="lightgray"]

	PC:h1 -- R1:h1
	PC:h2 -- R2:h2

	R1:fast -- PC:R1fast [color="lightgreen", taillabel="Cost: 100"]
	R2:fast -- PC:R2fast [color="lightgreen"]

	R1:slow -- R2:slow [color="crimson", taillabel="Cost: 200"]
}