unequal cost load balancing?

Hi, we have a 5Mbps symmetric microwave uplink with one static IP and a /30 subnet. We're contemplating getting an additional ADSL connection to serve as backup. If the ISP cooperates, is there a way for me to load-balance and fail over between these two connections using BIRD? If so, how? (The DSL connection would obviously be asymmetric; the downstream direction would probably be a lot faster than 5Mbps, whereas the upstream direction would probably be somewhat slower.) Thanks! Andras -- Andras Korn <korn at elan.rulez.org> - <http://chardonnay.math.bme.hu/~korn/> It's best to be at the centre of things - then you get in everybody's way.