KNOWN_MANDATORY = {
    "Unit": ["Description"],
    "Address": ["Address"],
    "BridgeFDB": ["MACAddress"],
    "Mount": ["What", "Where"],
    "NetDev": ["Name"],
    "L2TPSession": ["Name"],
    "Peer": ["Name"],
    "IPv6AddressLabel": ["Label", "Prefix"],
    "NextHop": ["Gateway"]
}
