We are experiencing that our filers reporting authentication errors (eventid 5722) in event logs on our domain controllers (2008r2), same as in this thread: https://kb.netapp.com/support/index?page=content&id=2013862
The workaround is presented in following KB: https://kb.netapp.com/support/index?page=content&id=2013862
The proposed workaround is based on that we lower security in our domain to NT 4 authentication algorithm. We do not want to do that.
We can see the errors popping up from all our filers, but they are all operational. No users has reported access problems to their CIFS file shares.
1) Why does the NetApp filers communicate with a security model from NT4? (NT was released in 1996. An eternity that is.)
2) Can the error be ignored? As mentioned, no users have reported errors. We can logon to filers with our windows admin accounts.