Do I really need two network cards to run ClusterReplica ENT?
No. Two cards are recommended but not required. The two most outstanding benefits of using two network cards in each of the clustered systems running ClusterReplica are security and efficiency. The two network cards allow you to use two different sets of IP addresses. The internal and external communications can then be separated, and therefore increasing security and efficiency. However, if you want to use only one network card in each of the clustering server, ClusterReplica will also work.
