Bandwidth Throttling Software for ISPs.

I am looking for a ISP Software Solution that allows me to Authenticate User by Mac Address, and allows me to throttle the users bandwidth. I am running a routed Network with close to 3000 students. Till this point I have been running the network open with no authentication and no bandwidth throttling. Any suggestions you all have I would greatly apreciate.

Thanks

I am an ISP, Let me explain my topology in detail and you'll see my challenge. Were located in Provo Ut and provide all of the telephone service for most of the Off Campus Housing complexes. (BYU, USVC etc.) Most of the complexes have between 300 to 1200 students. Weve bought and implemented a wireless backbone to connect all of the complexes. Weve put routers on the head end of each complex and Ethernet every apartment in the complex. So were built like a Lan/Wan but need to manage like an ISP. (Bandwidth throttling is a must so that we can up sale service etc.). When my company hired me, I told them I was a router guy not security, now that I have the complexes up and running they want me to find a way to controll it. *shrug* makes sense but they should have had a security guy the whole time.


Thanks for your reply