How to fix error error-cluster-network-exists in Windows 11

Solution Steps

1. 1 Open PowerShell as Administrator. Right-click the Start button and select 'Windows PowerShell (Admin)' or 'Terminal (Admin)'. This gives you the necessary permissions to run cluster commands.
2. 2 Run the command 'Get-ClusterNetwork' to list all existing cluster networks. This shows you what networks are already defined in the cluster, helping you identify if the network you're trying to add already exists.
3. 3 If you see a network with the same name or subnet, you can either use that existing network or remove it if it's no longer needed. To remove, use 'Remove-ClusterNetwork -Name ' (replace with the actual name). This clears the duplicate so you can create a fresh one.
4. 4 If the network doesn't appear but you still get the error, check for orphaned cluster objects using 'Get-ClusterResource' and 'Get-ClusterNetworkInterface'. Sometimes old resources linger and cause conflicts.
5. 5 After cleaning up, try adding the network again using 'New-ClusterNetwork -Name -Address -SubnetMask '. This should succeed now that the duplicate is gone.