Suggestions testing Samba 4 on same subnet as Standalone Samba 3 Server

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http://www.linuxquestions.org – My network currently has the following server running Samba 3 as a standalone server to 50 client boxes: Linux a1 #3 SMP Samba Version 3.5.6. Currently, no true NT Domain Controller, in Windows speak - it's a Workgroup only. I have another server that I want to configure to use Samba 4 as an Active Directory Domain Controller and file server: Linux a10 3.7.10-gentoo-r1 #1 SMP Samba Version 4.0.4. I only have one subnet and cannot disrupt the users, but have read the following concerns on the Samba wiki: Make sure you thoroughly test your conversion and how your clients react bef (HowTos)