Two sites-slow link-share printer-network share

Hi,
Our school has two campuses. CampusA has 50 uses and campusB has 10 uses.
The two campuses are connected via slow link. Currently, everything (AD(one domain) ,DHCP,NAP,internet) is setup in CampusA When staff(3/4) move from CampusA to CampusB (not that far, ~15 min), their traffic goes via the wireless link and as there
are only 3/4 roaming staff, slow link is OK. CampusB's 10 users traffic also goes via wireless link.
Now, we will have 80 students(all laptops) in 2015 in CampusB. We are using 192.168.4.0/24 subnet and we only have around 80 ips. Each laptop keeps two ips (lan/wireless) as a result we do not have enough ips. I could change the ip to classC(172.16.XX)
but the issue is the slow link.
I guess there will be issues with AD replication, group policy, DHCP, NAP (wireless)!!! Am I right ? Should I create another subnet/domain/two way trust for student- is it a good solution ?
**Student may move from CampusA/B to CampusB/A for various reasons and I need to make sure that they can access all the printers & file-share despite their location (CampusA/CampusB) !!
Hope it is clear.
Please give your opinion.

Hello,
what kind of connection is between the 2 sites?
Slow link for AD is defined with 512kbps.
See configuration within GPOs
http://technet.microsoft.com/en-us/library/cc781031(v=ws.10).aspx and effects
http://support.microsoft.com/kb/227260/en-us
Best regards
Meinolf Weber
MVP, MCP, MCTS
Microsoft MVP - Directory Services
My Blog: http://blogs.msmvps.com/MWeber
Disclaimer: This posting is provided AS IS with no warranties or guarantees and confers no rights.
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Two sites-slow link-share printer-network share

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