WSFCs monitor the status of the nodes participating and handle them when a problem occurs. Later versions of WSFCs offer such features as quarantining a node that is misbehaving or unavailable (i.e. node is not on, network communication is down, etc.). On the Linux side, this type of functionality is provided by a fence agent. The concept is sometimes referred to as fencing. However, these fence agents are generally specific to the deployment, and often provided by hardware vendors and some software vendors, such as those who provide hypervisors. For example, VMware provides a fence agent that can be used for Linux VMs virtualized using vSphere.
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