Hi,
I think I have found something interesting here, a QoS script compatibel w Fasttrack:
http://forum.mikrotik.com/t/fasttrack-friendly-qos-script/102401/1
I tried it, by adding a new dedicated Internet bridge, but failed… Time is over for my experiments, but I will try again next time.
Edit: I tried adding a somewhat modified fq_codel from the example above, with great results :
/queue type
add fq-codel-limit=1000 fq-codel-quantum=300 fq-codel-target=12ms kind=fq-codel name=fq-codel_short
/queue simple
add bucket-size=0.001/0.001 max-limit=300M/20M name=fqcod@e3inet queue=fq-codel_short/fq-codel_short target=br-inet total-queue=fq-codel_short
/queue tree
add bucket-size=0.01 disabled=yes max-limit=300M name=download packet-mark=no-mark parent=br-inet queue=fq-codel_short
add bucket-size=0.01 disabled=yes max-limit=20M name=upload packet-mark=no-mark parent=e3inet queue=fq-codel_short
The Upload is attached now to the bidge which has the public IP on it. Still the fasttrack needs to be enabled, but I get a straight A+ on the Waveform bufferbloat test. And CPU does not go higher than 20%. I am not sure if it has to do anything with the dedicated bridge, but whatever: it works OK.