Changing route based on packet loss

Hello fellow bird users, I was wondering if anyone has solved this with bird or bird plus something: Assuming you have multiple, somewhat lossy links. Packet loss might be in the range of 0-30% on each link. I would like bird to select the current best path, based on the amount of packet loss on each link. I've the seen the various rtt* options in babel, but the notion there seems to be more time(out) specific, rather than loss specific. Any pointers in the right direction are appreciated. Best regards, Nico -- Sustainable and modern Infrastructures by ungleich.ch