FAS2552 in 7 mode cifs - upgrade AD from 2012 to 2019

[SteveAPMA]

We have recently upgraded our Windows servers from 2012r2 to 2019 and would like to raise the AD from 2012 to 2019 but I would like to know if that will cause any effect on our cifs shares that NetApp is hosting.

NetApp Release 8.2.5P3 7-Mode

SMB2 is enabled.

Thanks.

[hmoubara]

Hello,

Based on our Matrix, this should be supported with the version of Ontap and AD/DC version. You can check and verify via the link below (Choose the CIFS compatibility matrix):

https://mysupport.netapp.com/matrix/#playground

Thanks 

[paul_stejskal]

You may have to enable SMB2 client. https://kb.netapp.com/Support_Bulletins%2FCustomer_Bulletins%2FSU18

(SMB1 is default)

[SteveAPMA]

SMB2 is on.  I did check, and the only smb1 connections are coming from my Unitrends backup appliance.  It has SMB2 enabled so I am not sure why it is connecting via smb1.  I assume if I don't disable smb1 on the NetApp that will continue to work.

[Mjizzini · Accepted solution]

There is 2 options for smb2.

The one related to the dc connection is " options cifs.smb2.client.enable " this option should be on for the dc to connect to the netapp via smb2.

CIFS shares not accessible after domain controller upgrade

[SteveAPMA]

Excellent point!  That setting is off for us currently.  Are there any 'gotchas' I should be aware of before enabling that?

I found these 2 articles that indicate changing this setting is non-disruptive:

https://serverfault.com/questions/125295/does-enabling-smb2-on-a-netapp-filer-require-a-cifs-restart

https://library.netapp.com/ecmdocs/ECMM1278400/html/filesag/GUID-B7AF086E-4332-4A2E-BEAA-7273B7B03EBF.html

[paul_stejskal]

No that should be it. Everything is covered in the KB I linked above too, so I'd encourage a good read.

Let us know if there are any questions.

[SteveAPMA]

The setting is enabled.  So far no disruptions.  Thank you.