{
    "nodes": [
	{
	    "name": "r1",
	    "type": "router"
	},
	{
	    "name": "h1",
	    "type": "host"
	},
	{
	    "name": "h2",
	    "type": "host"
	}
    ],
    "networks": [
	{
	    "name": "r1-left",
	    "advertise-routes-from": [],
	    "links": [
		"h1",
		"r1"
	    ]
	},
	{
	    "name": "r1-right",
	    "advertise-routes-from": [],
	    "links": [
		"r1",
		"h2"
	    ]
	}
    ]
}