{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "Describes a network link. A network link consists of two peers. Each peer in the link must be a network device, links between network devices and endpoints are not represented. Links are always bidirectional. That is, the order of the peers in this entity carries no special meaning.",
    "properties": {
        "id": {
            "description": "Globally unique identifier for the network link",
            "pattern": "^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$",
            "type": "string"
        },
        "peers": {
            "description": "List of peers in a link. Each peer is a network device (switch). There must be exactly two peers in the list.",
            "items": {
                "properties": {
                    "device_id": {
                        "description": "Globally unique identifier of a network device.",
                        "pattern": "^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$",
                        "type": "string"
                    },
                    "port_id": {
                        "anyOf": [
                            {
                                "description": "When the Port ID is a MAC address, use this format.",
                                "pattern": "^([0-9a-f]{2}-){5}([0-9a-f]{2})$",
                                "type": "string"
                            },
                            {
                                "description": "When the Port ID is anything other than a MAC address, a freeform string may be used.",
                                "pattern": "^.+$",
                                "type": "string"
                            }
                        ],
                        "description": "Matches the port_id of the interface of the network device to which the link is connected."
                    }
                },
                "required": [
                    "device_id",
                    "port_id"
                ],
                "type": "object"
            },
            "maxItems": 2,
            "minItems": 2,
            "type": "array",
            "uniqueItems": true
        },
        "speed": {
            "description": "Speed of the link, formatted as a number followed by kbit/s, Mbit/s, Gbit/s. NB: Values should be formatted with no fraction component if possible, using the largest unit that allows that.",
            "pattern": "^(0|[1-9][0-9]*)(\\.[0-9]+)?[kMG]bit\\/s$",
            "type": "string"
        }
    },
    "required": [
        "id",
        "peers",
        "speed"
    ],
    "type": "object"
}