topic Re: FAS2552 in 7 mode cifs - upgrade AD from 2012 to 2019 in ONTAP Hardware

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

SteveAPMA — Wed, 04 Jun 2025 10:53:45 GMT

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.

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

hmoubara — Wed, 16 Sep 2020 02:47:32 GMT

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

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

paul_stejskal — Wed, 16 Sep 2020 14:32:20 GMT

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

(SMB1 is default)

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

SteveAPMA — Wed, 16 Sep 2020 14:57:32 GMT

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.

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

Mjizzini — Thu, 17 Sep 2020 04:07:48 GMT

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

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

SteveAPMA — Thu, 17 Sep 2020 14:26:12 GMT

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

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

paul_stejskal — Thu, 17 Sep 2020 14:41:57 GMT

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.

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

SteveAPMA — Thu, 17 Sep 2020 16:30:57 GMT

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