ERROR_CLUSTER_NETWORK_ALREADY_ONLINE - 5063 (0x13C7)
The cluster network is already online.
Updated: Feb 21, 2026
Technical Meaning
The error ERROR_CLUSTER_NETWORK_ALREADY_ONLINE indicates that a network resource within a Windows Failover Cluster is already in an online state. This error typically occurs during operations intended to bring a network resource into the online state when it is already active.
Error Details
- Error Name: ERROR_CLUSTER_NETWORK_ALREADY_ONLINE
- Numeric Code: 5063 (0x13C7)
- Short Description: The cluster network is already online.
This error suggests that the operation to bring a network resource into an online state was attempted, but the resource was already in the correct operational state. This can occur during failover operations or configuration changes within a Windows Failover Cluster environment.
Usage Context
The ERROR_CLUSTER_NETWORK_ALREADY_ONLINE is commonly encountered in scenarios where network resources are managed through cluster management tools or APIs. It may also appear when using PowerShell cmdlets, such as Set-ClusterNetwork, which attempts to change the state of a network resource within a failover cluster.
Developer Interpretation
Developers should interpret this error as an indication that the operation was unnecessary because the target network resource is already in the desired operational state. This can be useful for ensuring that operations are idempotent and do not inadvertently alter system state.
Related Errors
ERROR_CLUSTER_NETWORK_NOT_FOUND(5061, 0x13C1): The specified network resource was not found within the cluster.ERROR_CLUSTER_INVALID_NODE(5079, 0x142B): An invalid node ID or name was provided for a cluster operation.
FAQ
Q: What does the error ERROR_CLUSTER_NETWORK_ALREADY_ONLINE mean?
A: It indicates that an attempt was made to bring a network resource into an online state when it is already active.
Q: How can I handle this error in my code?
A: You should check for this error and ensure that your operations are idempotent, meaning they do not alter the system state if the target resource is already in the desired state.
Summary
The ERROR_CLUSTER_NETWORK_ALREADY_ONLINE (5063) is a specific error code indicating that an operation to bring a network resource into an online state was unnecessary because the resource was already active. This error can be useful for ensuring that operations are idempotent and do not inadvertently alter system state during cluster management tasks.