>>Hi,
>>
>>I am going through tons of messages on the SMB subject. Could someone please clarify if the various 'solution' approaches (of disabling SMB1/2/3) have to be done to client PCs or server (specifically Server 2008 r2)?
>
>My understanding is summarized in Message#1620274 .
>
>Instead of completely disabling SMB2.x/3.x (not recommended IMO), you can add parameters in the Registry.
>
>That said, the SMB issue is probably about the last thing that should be checked. Which begs the question, what else should you be looking at? Maybe Message#1620380 for some ideas.

the sporadic part does point to a router / server in between cutting/loosing the connection or barfing up like SMB2/Oplocks is famous for.
And 2008 r2 AFAIK does not have SMB3, so some patches probably need to be done there for stability IAC.
Only question if there is more work needed ;-)