I have a 5Mb/s circuit. I have sublet 2Mb/s. How do I guarantee my sublet their 2Mb/s yet allow me to utilize above 3Mb/s if the sublet isn't using 2Mb/s i.e, WFC, WRED, Priority queing, custom queing, traffic-shaping, rate limit et cetera? My ISP doesn't preserve the TOS bit, right now. What's the best way to do it?
I am using a 3800 series router with current IOS.