Hi Hosam,
as a matter of fact few guys and I have a proposal on the table for that, not precisely the same as pfr, but more a load
based loadbalancing dynamically adjusted.
this is longer term.
today I can offer you DMZ link bandwidth whereby you can statically apply a load distribution (ECMP) in an unequal path sharing (UCMP). google ucmp asr9000 for more details if you're interested in that.
regards
xander