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      -  services (non-ip services, like dns)

    networks and links are combined via network items referencing specific
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    links and then walk the network list to determine if any of the networks
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    We also need to map network_data.json fields to network_config fields. For
    example, the network_data links 'id' field is equivalent to network_config
    'name' field for devices.  We apply more of this mapping to the various
    link types that we encounter.

    There are additional fields that are populated in the network_data.json
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