About I/O fencing in campus clusters

You must configure I/O fencing to prevent corruption of shared data in the event of a network partition.

See About membership arbitration.

See About data protection.

You can use coordinator disks, coordination point server (CP server), or a mix of both as coordination points to configure I/O fencing.

In a campus cluster setup, you can configure I/O fencing as follows:

You can also configure a coordination point server (CP server) at the third site instead of a third coordinator disk.

See the Cluster Server Installation Guide for more details to configure I/O fencing.