Medium
Operating Systems
✓ Solution Verified by Community (0+ upvotes)
How to fix error error-cluster-invalid-ipv6-tunnel-network in Windows 11
ERROR_CLUSTER_INVALID_IPV6_TUNNEL_NETWORK = 5927
Fix based on community reports and expert analysis. Last verified: 2026-08-12
· How we verify fixes
| Error Code | error-cluster-invalid-ipv6-tunnel-network |
|---|---|
| Affected System | Windows 11 (Microsoft) |
| Difficulty | Medium |
| Estimated Time | 25 min |
| Requires Admin Rights | ⚠️ Yes |
Solution Steps
- 1 Open Network Connections: Press Windows key + R, type 'ncpa.cpl', and press Enter. Look for any tunnel adapters (e.g., 'Teredo Tunneling Pseudo-Interface' or 'Microsoft ISATAP Adapter').
- 2 Right-click the tunnel adapter and select 'Properties'. Ensure that IPv6 is enabled and that the adapter is not disabled. If it is disabled, enable it.
- 3 If the tunnel adapter is using a specific IPv6 address, verify that it is valid. You can check the address by running 'ipconfig /all' in Command Prompt. Look for the tunnel adapter's IPv6 address.
- 4 In Failover Cluster Manager, check the network properties for the tunnel network. Right-click the network and select 'Properties'. Ensure that the IPv6 address and prefix are correct.
- 5 If the tunnel network is not needed, you can disable it. In Network Connections, right-click the tunnel adapter and select 'Disable'. Then, in Failover Cluster Manager, remove the network if it is no longer used.
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