I have no idea. I'm also not going to go searching over the forums for them. Realistically is this causing any issues in any shape of form with your connection?

Chris I did try cable fibre router, Netgear Fibre router and BT Home Hub 5 all the same result 72/17 with windows 7, windows 8.1 and linux mint 16. So, how on earth other plusnet user manage to get 75/19?

Do I need to tweak MTU on the router?

Edited by adslmax (Fri 21-Mar-14 15:23:36)

Not fibre, but my parents switched to Plusnet recently (from another 21CN ISP) - nothing was changed in the setup, but the throughput relative to the sync is consistently down at least 5% compared to before. It's not a plusnet profile mismatch. Even on a lower sync the throughput was a bit faster with the previous ISP.

Someone else here asked me for assistance with their move, the plusnet profile was low and I had to tell them how to request a change. It was kindly and swiftly changed but their speed test is still down about 8% compared like-for-like with BT and again nothing was changed in the setup. They are on the edge of having breathing space for movie streaming and browsing, so it does make a difference.

I haven't yet taken this up with Plusnet. I wondered if an artificially high or unlimited profile could be applied temporarily for testing/elimination purposes out of peak times?

In reply to a post by adslmax:

In reply to a post by chrisparr:

I've *definitely* seen speedtest.net results from Plusnet customers over 74/75Mbps which would indicate that it's possible on our service.

My best mate is on Plusnet FTTC

No way you've got close friends..

Cough and I've seen some speed testers (not speedtest.net) report a speed 20% over and above my sync speed on FTTC.

Have seen ookla report marginally high due to the nature of the rejection algorithm they use.

Its Friday or I'd pull the data up in excel for ours, which shows a nice clean edge for the fastest speeds, but browser/flash version even PC can all make a difference. Its only once you get enough tests to see the patterns emerge and even then difficult to tell due to all the other variables

I would have thought your daughter would be quite happy with the speeds you mention, after all you gave her your FTTC connection not long ago.

the plusnet profile system I have found rate limits to a bit below the BT rate, even tho the cap is set at same amount the tcp throughput is lower.

Also I have found if not on pro, the traffic management seems to like to keep a part of the line idle.

That's normal for a QOS system. You can't give priority if you don't reserve some bandwidth.

Correct. They have to be slightly slower than the hard limit BT place on the connection. If the traffic rate were to exceed BT's limit, packets would be blindly limited/delayed/dropped (aka policed) at BT's equipment before being forwarded down the line to your modem, which would undo any traffic shaping/prioritisation they applied previously to those packets.

They probably limit to 95-97% of the BT profile but only PlusNet would be able to tell you for sure.

Chris - I see many speed tests from many ISPs, and I checked re this specific issue not long ago.

The maximum speed test result for Plusnet on full 80 Mbps sync is definitely lower than that for BT/Sky/Zen. The difference is much greater than the slight drop you impose through the IP Profile copy being a fraction lower than the BT Wholesale one. IIRC it is 74.nn Mbps.

It is not a good idea to ask (paraphrasing) "So what, can you tell the difference?" First, the answer from some people, the really heavy downloaders of which I do not think adslmax is one, would be yes! Second - it does matter if the maximum on Plusnet, for whatever reason, is lower than on other ISPs. If Plusnet aren't (or weren't) aware of it, they need to be, and to see if it is fixable. Denial is not an option. Acceptance, plus a "that's how it is at our prices", is.

Is it perhaps simply the DPI system not being able to do its job and still manage to output at over 75Mbps? Or - what is the highest possible throughput per connection on a PN gateway?

Edited by RobertoS (Fri 21-Mar-14 22:36:09)