# icmpv6 type nd-router-advert
[
    {
        "match": {
            "left": {
                "payload": {
                    "field": "type",
                    "protocol": "icmpv6"
                }
            },
	    "op": "==",
            "right": "nd-router-advert"
        }
    }
]

# meta l4proto ipv6-icmp icmpv6 type nd-router-advert
[
    {
        "match": {
            "left": {
                "meta": { "key": "l4proto" }
            },
	    "op": "==",
            "right": "ipv6-icmp"
        }
    },
    {
        "match": {
            "left": {
                "payload": {
                    "field": "type",
                    "protocol": "icmpv6"
                }
            },
	    "op": "==",
            "right": "nd-router-advert"
        }
    }
]

# meta l4proto icmp icmp type echo-request
[
    {
        "match": {
            "left": {
                "meta": { "key": "l4proto" }
            },
	    "op": "==",
            "right": "icmp"
        }
    },
    {
        "match": {
            "left": {
                "payload": {
                    "field": "type",
                    "protocol": "icmp"
                }
            },
	    "op": "==",
            "right": "echo-request"
        }
    }
]

# meta l4proto 1 icmp type echo-request
[
    {
        "match": {
            "left": {
                "meta": { "key": "l4proto" }
            },
	    "op": "==",
            "right": 1
        }
    },
    {
        "match": {
            "left": {
                "payload": {
                    "field": "type",
                    "protocol": "icmp"
                }
            },
	    "op": "==",
            "right": "echo-request"
        }
    }
]

# icmp type echo-request
[
    {
        "match": {
            "left": {
                "payload": {
                    "field": "type",
                    "protocol": "icmp"
                }
            },
	    "op": "==",
            "right": "echo-request"
        }
    }
]