In order for a cluster to work as expected, the nodes must be in agreement on certain facts, such as which machines are currently cluster members, where services are running, and which machines are using which resources. The method in which this is implemented in the Red Hat High Availability Add-on is by the use of a majority voting scheme. Every cluster node casts one vote if it successfully joins the corosync network communication and is able to communicate with the other nodes that are already participating in the cluster.