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General Discussion

WWN Not showing or not being able to connect to VCENTER 6.5 with Snapdrive 7.x


Hi there,


After upgrade to VCenter 6.5 we were not able to see the WWN when trying to connect a LUN. After removing the VCenter credentials from SnapDrive we were not able to connect to the VCenter again. The error we had is: Cannot connect to "vCenter_Name on port 443". The underlying connection was closed.


I could not find a solutions on the Netapp site but i did found a solution and wanted to share:


You need to make adjustments to the registry. Something changed in TLS on the VCenter and in order for Snapdrive to work with that you need to add a dword value.




To enable communication between PowerCLI and vCenter Server systems that use the TLSv1.1 or TLSv1.2 protocols, you must edit the Windows registry.
Note: You must use PowerCLI 6.0 R1 or later. Earlier versions of PowerCLI work with versions of the .NET Framework that cannot use the TLSv1.1 and TLSv1.2 protocols by editing the registry.
  • For 32-bit processes, change the following registry key value to 1.

    Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\[.NET_version]
    Value: SchUseStrongCrypto (DWORD)

  • For 64-bit processes, in addition to the above registry key, change the following registry key value to 1.

    Key: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\[.NET_version]
    Value: SchUseStrongCrypto (DWORD)








Thanks for your contribution!

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