9.7 Scenario: Default split and merge policy 9.7.1 Scenario description Figure 9-35 shows the topology of the default split and merge scenario. This scenario keeps the default configuration for the split and merge policy and does not set  the quarantine policy. To simulate a cluster split, break the network communication between  the two PowerHA nodes, and disable the repository disk access from the PHA170 node. After a cluster split occurs, restore communications to generate a cluster  merge  event. 362  IBM PowerHA SystemMirror V7.2.3 for IBM AIX and V7.2.2 for Linux Figure 9-35 Topology of the default split and merge scenario This section shows a scenario with the default split and merge policy.