ERROR_CLUSTER_INVALID_IPV6_NETWORK - 5926 (0x1726)
The cluster network is not valid for an IPv6 Address resource, or it does not match the configured address.
Updated: Feb 21, 2026
Technical Background
The ERROR_CLUSTER_INVALID_IPV6_NETWORK error code is specific to Windows cluster environments and indicates that a network configuration issue exists for an IPv6 address resource. This error typically arises when the network settings do not conform to the expected requirements of the cluster environment.
Error Details
The error message states that either the configured network is invalid or it does not match the existing IPv6 address resources in the cluster. This can occur due to misconfiguration, incorrect network parameters, or unsupported operations within the cluster context.
Common Causes
- Incorrect Network Configuration: The network settings for an IPv6 address resource are improperly configured and do not align with the expected standards of the cluster environment.
- Mismatched Address Resources: The IPv6 addresses assigned to the cluster nodes do not match or are inconsistent with the existing configuration.
- Unsupported Operations: Attempting to perform operations that require specific network configurations, but the current setup does not support these requirements.
Real-World Context
In a Windows Server Failover Clustering (WSFC) environment, IPv6 addresses play a crucial role in ensuring reliable communication between cluster nodes. This error can impact the functionality of the cluster if it is unable to properly recognize or utilize the configured IPv6 network settings.
Is This Error Critical?
The criticality of this error depends on the specific operations being performed within the cluster. If the cluster relies heavily on IPv6 for communication, then this error could prevent certain services from functioning correctly. However, in environments where IPv6 is not a primary requirement, the impact may be minimal.
How to Diagnose
To diagnose and resolve ERROR_CLUSTER_INVALID_IPV6_NETWORK, follow these steps:
- Review Network Configuration: Verify that all network settings for IPv6 addresses are correctly configured on each cluster node.
- Validate Parameters: Ensure that the parameters passed to any operations involving IPv6 addresses are valid and match the expected values.
- Confirm Object Types: Check that the objects being manipulated (e.g., network interfaces, IP addresses) are of the correct type and are compatible with the cluster environment.
- Verify Input Data: Confirm that all input data for network operations is accurate and up-to-date.
- Check Limits or Constraints: Ensure that no limits or constraints have been exceeded in terms of the number of IPv6 addresses or other related resources.
How to Resolve
To resolve ERROR_CLUSTER_INVALID_IPV6_NETWORK, consider the following actions:
- Correct any misconfigurations found during the diagnostic process.
- Adjust network settings as necessary to ensure they are compatible with the cluster environment.
- Restore data if corruption is detected or if incorrect values were used previously.
- Retry operations using valid inputs and parameters that align with the expected requirements of the cluster.
Developer Notes
When working with IPv6 addresses in a Windows cluster, it is essential to ensure that all network configurations are correctly set up. Developers should be aware of the specific requirements for IPv6 within the cluster environment and validate all network-related operations accordingly.
Related Errors
ERROR_CLUSTER_INVALID_NODE(0x1725)ERROR_CLUSTER_INVALID_IP_ADDRESS(0x1724)ERROR_CLUSTER_INVALID_NETWORK(0x1723)
FAQ
Q: What does the ERROR_CLUSTER_INVALID_IPV6_NETWORK error mean?
A: This error indicates that the network configuration for an IPv6 address resource is invalid or does not match the existing settings in the cluster.
Q: How can I prevent this error from occurring?
A: Ensure all network configurations are correct and compatible with the cluster environment. Validate parameters and input data before performing any operations involving IPv6 addresses.
Q: Can this error affect the overall functionality of a Windows cluster?
A: Yes, if the cluster relies on IPv6 for communication, this error can prevent certain services from functioning correctly.
Summary
ERROR_CLUSTER_INVALID_IPV6_NETWORK is a specific error code that indicates issues with network configurations in a Windows cluster environment. By understanding its causes and following diagnostic and resolution steps, developers can ensure that their clusters operate smoothly and efficiently.