ERROR_CLUSTER_NETWORK_ALREADY_OFFLINE - 5064 (0x13C8)
The cluster network is already offline.
Updated: Feb 21, 2026
Introduction
This article provides a detailed explanation of the Windows error code ERROR_CLUSTER_NETWORK_ALREADY_OFFLINE with numeric value 5064 and hexadecimal representation 0x13C8. The focus is on its technical meaning, usage context, and developer interpretation.
Technical Meaning
The error ERROR_CLUSTER_NETWORK_ALREADY_OFFLINE indicates that a network resource within a Windows Failover Cluster is already in an offline state. This status can be encountered during operations such as failover or maintenance actions where the cluster manager attempts to bring a network resource online but finds it is already offline.
Error Details
The error ERROR_CLUSTER_NETWORK_ALREADY_OFFLINE is returned when the cluster management service detects that a specified network resource is not available for use. This can occur in various scenarios, such as during failover operations or when attempting to configure a network resource within the cluster environment.
Usage Context
This error code is typically encountered in the context of Windows Failover Clustering and related network configurations. It may be relevant during operations that involve network resources managed by the cluster service, including but not limited to:
- Network interface configuration
- IP address management
- Network load balancing
- Failover operations involving network resources
Developer Interpretation
Developers should interpret this error as an indication that a specific network resource is already in an offline state. This can affect the outcome of operations intended to bring the network resource online, such as failover or configuration changes.
Related Errors
ERROR_CLUSTER_NETWORK_NOT_FOUND(5061): Indicates that a specified network resource could not be found within the cluster.ERROR_CLUSTER_NODE_NOT_FOUND(5078): Indicates that a specified node in the cluster is not available.ERROR_CLUSTER_GROUP_MOVING(5092): Indicates that a group operation cannot proceed because another group operation is currently in progress.
FAQ
Q: What does the error ERROR_CLUSTER_NETWORK_ALREADY_OFFLINE mean?
A: This error indicates that a network resource within a Windows Failover Cluster is already offline and cannot be brought online through the current operation.
Q: How can I resolve this issue?
A: Ensure that the network resource is correctly configured and available before attempting to bring it online. Check the status of the network interface or related configuration settings.
Summary
The error ERROR_CLUSTER_NETWORK_ALREADY_OFFLINE (5064) indicates that a network resource within a Windows Failover Cluster is already offline, preventing certain operations from completing successfully. Developers should interpret this error as an indication to verify the status and availability of the network resource before proceeding with cluster management tasks.