# dup to 192.168.2.1
[
    {
        "dup": {
            "addr": "192.168.2.1"
        }
    }
]

# dup to 192.168.2.1 device "lo"
[
    {
        "dup": {
            "addr": "192.168.2.1",
            "dev": "lo"
        }
    }
]

# dup to ip saddr map { 192.168.2.120 : 192.168.2.1 } device "lo"
[
    {
        "dup": {
            "addr": {
                "map": {
                    "key": {
                        "payload": {
                            "field": "saddr",
                            "protocol": "ip"
                        }
                    },
                    "data": {
                        "set": [
                            [
                                "192.168.2.120",
                                "192.168.2.1"
                            ]
                        ]
                    }
                }
            },
            "dev": "lo"
        }
    }
]