azure-container-networking/examples/cns/create-hns-network.json

{
    "NetworkName": "hnsnw",
    "NetworkType": "l2tunnel",
    "Subnets": [
        {
            "AddressPrefix": "192.168.255.0/30",
            "GatewayAddress": "192.168.255.1"
        }
    ]
}