Offices are rented for short period (2-8 month). Landlord is providing internet access in the offices and depend on the price I "simply queue" the speed. The following is not exact setup I have. I just simplified to 4 networks to explain my dilemma. Up until now I had 100M of committed bandwidth from ISP that i Simply Queued to four sub networks as 4 x 25M. Now I've got 100M burstable to 200M. How can I setup my four queues to be 25 burstable to 50 but only if not in use by other network. Sort of, you can have 50 if ISP has more then 100M available and other three networks still have committed 25M speed? In other words, I'm trying to provide "burstability" option to the tenants. the amount of subnetworks can go in the future to as high as 40 and the price structure now is based on committed speed.