[K12OSN] Multiple LTSP servers on a single subnet?

[Casey Woods]

I will have both students and staff using thin clients and they will all 
be on the same IP subnet.  This subnet is dedicated to thin client 
traffic.  I would like to connect two LTSP servers to the subnet and 
somehow control which server the clients connect to on a client by 
client basis (students to one server and staff to the other).  I'm 
assuming that there is some way to do this with MAC addresses?

Here's why I want to do this:  I have a single gigabit fiber connection 
between two buildings.  I want to consolidate all my LTSP servers in 
building A.  The thin clients are in building B.  Best case scenario 
would have me light up another fiber connection so that I can run two 
subnets.  I have the extra fiber strands, but I'm try to avoid that 
added expense.

I'm open to any and all ideas!

Thanks,
Casey Woods