The answer is already provided but wanted to explain the logic of it. There are two ways that a distributed search is configured. One for non-clustered Indexers and one for clustered Indexers. The one for non-clustered Indexers is done via adding the Indexers as Search Peers, the other for clustered Indexers is done by adding the Search Head to the cluster via Indexer Clustering. The Monitoring Console (MC) is using the non-clustered method to connect to all instances it is monitoring (Adding those as Search Peers). The documentation assumes the MC is already connected to the cluster via the Indexer Cluster settings so it is not required that the clustered Indexers be added as standalone Indexers (Search Peers). The Cluster Master should be added as a Search Peer like the rest of the instances the MC monitors so it will be searchable as it is not searchable via the Indexer Cluster configuration. In short, both configurations are required. The Cluster Master as a Search peer and the Monitoring Console as a Search Head in the Cluster. Hope this clarifies the requirements for a standalone MC monitoring clustered Indexers. ... View more