ERROR_INVALID_CLUSTER_IPV6_ADDRESS - 5911 (0x1717)
The address is not valid for an IPv6 Address resource. A global IPv6 address is required, and it must match a cluster network. Compatibility addresses are not permitted.
Updated: Feb 21, 2026
Technical Meaning
This error code indicates that an IPv6 address resource used in a Windows cluster environment is invalid. Specifically, the address provided does not meet the requirements for being a valid global IPv6 address within the context of the cluster network.
Error Details
The error ERROR_INVALID_CLUSTER_IPV6_ADDRESS (5911 or 0x1717) signifies that the IPv6 address specified is not suitable for use in a Windows cluster. The requirements include:
- Global IPv6 Address: Only global unicast addresses are permitted, as opposed to link-local or unique local addresses.
- Network Matching: The provided IPv6 address must correspond to one of the network interfaces configured within the cluster environment.
Usage Context
This error typically occurs during operations involving cluster networking and IPv6 configuration. It is relevant in scenarios where a global IPv6 address is necessary for communication between nodes in a Windows Failover Cluster (WFC).
Developer Interpretation
Developers should ensure that any IPv6 addresses used in cluster configurations are valid, globally routable unicast addresses. Additionally, the network interfaces associated with these addresses must be properly configured and recognized by the cluster.
Related Errors
ERROR_INVALID_ADDRESS(10023)ERROR_NETNAME_DELETED(645)ERROR_NETWORK_ACCESS_DENIED(51)
FAQ
Q: What does this error mean?
A: This error indicates that an IPv6 address used in a Windows cluster is not valid. It must be a global unicast address and match the configured network interfaces.
Q: How can I resolve this issue?
A: Verify that the IPv6 addresses are correctly assigned as global unicast addresses and that they correspond to the network interfaces within your cluster configuration.
Summary
The ERROR_INVALID_CLUSTER_IPV6_ADDRESS error code is specific to Windows cluster environments where only valid, globally routable IPv6 addresses can be used. Developers must ensure compliance with these requirements to avoid this error.