Question about AppleTalk for VLAN

Hi,
I have a question about needing to have AppleTalk configured for a VLAN, since OSX 6 no longer supports Appletalk. Some client machines are using Leopard 10.5. I have already said that it is probably unnecessary to have that setting. I have been told its easy enough to add if its needed later. They are installing a new VLAN switch to solve an authentication problem that the MAC users are having.
Thanks for any input.
