i want to setup bandwidth base routing how can i do that?

i have two isp connection .i am having a two live ip. one with 8mbps and another with 20mbps. i want to setup routing such that upto 6mbps request goes to first isp . after that speed increases request goes to second isp connection.
how can i do that?

Hello,
recently i do exaxt the same configuration.

In my case i looking for a solution to have bandwidth load balancing with two dsl lines.

I do my setup as described here:

http://mum.mikrotik.com/presentations/US12/tomas.pdf

Key is to define a script which make changes in the firewall mangle table, triggerd by the ‘Traffic Monitor’.

btw.. actual i have found a better solution for my case which bond the two DSL lines, but this need additional things.

Regards
Marcus