In all cases, when LLT on a system no longer receives heartbeat messages from another system on any of the configured LLT interfaces, GAB reports a change in membership.
When a system has only one interconnect link remaining to the cluster, GAB can no longer reliably discriminate between loss of a system and loss of the network. The reliability of the system's membership is considered at risk. A special membership category takes effect in this situation, called a jeopardy membership. This provides the best possible split-brain protection without membership arbitration and SCSI-3 capable devices.
When a system is placed in jeopardy membership status, two actions occur