In reply to a post by jchamier:

Many use the PPP extensions to run at 1500 now as well, I can on PlusNet and did on BT both on FTTC.

Yeah, most networks are happy to run at 1500 MTU on PPPoA, with the notable exception of TalkTalk which is limited to 1492. Not sure how many networks run extensions to raise PPPoE to 1500, but that always struck me as overkill for the extra 8 bytes.

Well yesterday I got a new ac68.

The ac66 cannot handle pppoe at full FTTC sync speed without CTF, and it defenitly cannot handle it with QoS enabled.

My new AC68 can and now i enabled QoS, I set upstream to 90% of the normal speed, left downspeed on full and now massive improvement.

I get an A on the dslreports test, and I also observed e.g. if I have the tbb test running both up and down has no affect on ssh latency, smooth as silk, before it became a jerk fest.

I'm on TalkTalk Fibre.

I'm using these scripts and I'm still finding latency to be a little bit too high when downloading but not when uploading.

I read above that TalkTalk does PPP differently, does that mean I need to set a different overhead?

In reply to a post by arobertson545:

I read above that TalkTalk does PPP differently, does that mean I need to set a different overhead?

No. But I would ignore the usual TalkTalk advice of using an MTU of 1432 and use 1492 instead.

I'm just curious how much bandwith people here are losing with the methods to control Bufferbloat?

Is 3Mb or so a normal amount?

well is latency or speed capacity more important to you?

e.g. 3mbit on my downstream is about 3-4% of my max speed. It prevents packetloss and makes latency a fraction of what it would be if left alone.

For upstream 2mbit is 10%, but the effect is bigger, as upstream left alone will make latency skyrocket.

But then again I am not downloading 24/7 so I guess it isnt everything for me.

In reply to a post by arobertson545:

I'm just curious how much bandwith people here are losing with the methods to control Bufferbloat?

Since it's mainly an upstream issue, and since people rarely continuously max out their upstream for long periods of time, it's not really a huge issue.