{
    "hosts": [
        "h1",
        "h2",
        "h3",
        "h11",
        "h22"
    ],
    "switches": {
        "s1": { "cli_input" : "s1-commands.txt" },
        "s2": { "cli_input" : "s2-commands.txt" },
        "s3": { "cli_input" : "s3-commands.txt" }
    },
    "links": [
              ["h1", "s1"], ["h11", "s1"], ["s1", "s2", "0", 0.5], ["s1", "s3"],
              ["s3", "s2"], ["s2", "h2"], ["s2", "h22"], ["s3", "h3"]
    ]
}