Differences between the ONTAP MetroCluster configurations
The various MetroCluster configurations have key differences in the required components.
In all configurations, each of the two MetroCluster sites is configured as an ONTAP cluster.
| Feature | IP configurations | Fabric-attached configurations |
|---|---|---|
| Four- or eight-node | ||
| Number of controllers | Four | Four or eight |
| Uses an FC switch storage fabric | No | Yes |
| Uses an IP switch storage fabric | Yes | No |
| Uses FC-to-SAS bridges | No | Yes |
| Uses direct-attached SAS storage | Yes (local attached only) | No |
| Supports ADP | Yes | No |
| Supports local HA | Yes | Yes |
| Supports automatic switchover | No | Yes |
| Supports unmirrored aggregates | No | Yes |
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