Cluster Quorum

For a cluster to be operational, it must include more than half the number of configured switches in the cluster view. In an N-switch cluster, N/2 + 1 switches form a cluster quorum.

If N is even, the cluster quorum requires N/2 switches and also, the presence of the switch with the lowest node ID.

The quorum logic ensures that in the event of cluster partitions, at most one partition can be operational. All other switches are nonoperational. This guarantees the consistency of the cluster.