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How to establish a neighborhood

A neighborhood exists only when a V-Series system can see array LUNs that belong to another V-Series system that is not its partner in an HA pair. To establish a neighborhood, the storage arrays and switches must be configured to enable all V-Series systems in the same neighborhood to see the same array LUNs.

Data ONTAP configuration to establish a neighborhood

No explicit configuration is required on a V-Series system to support neighborhoods. The underlying functionality that enables the V-Series systems to operate as a neighborhood is the Data ONTAP disk ownership feature (assigning array LUNs to a specific V-Series system).

Note: After you determine the maximum number of LUNs that the storage arrays can present to your neighborhood, be sure to communicate that information to the storage array administrators.

Storage array configuration to establish a neighborhood

The storage array administrator must configure one or more storage arrays to present the same LUNs to the V-Series systems that you want to be in the neighborhood.

How a storage array administrator creates and presents LUNs to hosts varies on different storage arrays. Typically the storage array administrator specifies the FC initiator ports of a number of V-Series systems to be in the same host group on the storage array. This host group configuration enables all the systems to see the same LUNs.

The storage array administrator must also set the storage array access controls so that all the V-Series systems can see the same array LUNs.

Switch configuration to establish a neighborhood

If your configuration is fabric-attached, you must zone switch ports that connect to your V-Series system FC initiator ports. This ensures that all V-Series systems in the neighborhood can see the same array LUNs.

Note: It is recommended that you use single-initiator zoning, which limits each zone to a single V-Series system FC initiator port.