A. DC communication is critical for clusters to function and you must have multiple domain controllers to ensure domain availability. Microsoft supports making cluster nodes into DCs.
The best practice is to make both notes in a two-node cluster DCs. If you have more than two nodes, you should make at least two nodes DCs. If you don't have any other DCs in your environment, be sure to make the cluster nodes Global Catalogs as well.
Microsoft doesn't support making cluster nodes Read-Only Domain Controllers. See the Microsoft Help and Support site about using cluster nodes as DCs for more information.Related Reading:
- How do I create a failover cluster in Windows Server 2008?
- Is a Windows Server 2003 and Windows Server 2008 mixed-cluster possible?
- How can I add disk resources to a Windows Server 2008 cluster from the command line?
- How do cluster shared volumes work in Windows Server 2008 R2?
- How to Manage Failover Clusters in Windows Server 2008
- Configure Windows Server 2008 Failover Clustering from the Command Line
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