How can I find the value discovery.zen.ping.multicast.enabled of a cluster using API ? I tried curl -X GET "http://localhost:9200/_cluster/settings?include_defaults=true" but it doesn't show the multicast enabled value.
Multicast networking doesn't exist in 5.x and 6.x versions, and was provided by an optional plugin in 2.x versions. See https://github.com/elastic/elasticsearch/issues/18686#issuecomment-223078307.
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