Fibre 80/20 speed expectations
@RealAleMadrid Ah now that explains what I was seeing when I checked your line stats yesterday (On the back of this thread), I thought it was odd you only had a speed of around 60mbps.
Fingers crossed for a speedy recovery to your speed (No pun intended)
Hi @ncd There’s no restrictions on your sync speed however retransmission is going to cause a lower BRAS/IP profile which will affect your throughput. Retransmission is setting on a line handled by DLM, which is a form of error correction similar to interleaving.
If you’re seeing the BRAS at 73.7mbps that’d make more sense and in line with what Kevin’s seeing as you’ve both got an 80mbps sync speed and retransmission enabled.
@ejs It's not a case of only just noticing it, I know it's been this way for a long time. Day to day use is fine, but it's one of those little niggling things that it "could be faster" 
So the question now is, why am I on retransmission high if my connection is good enough to give me a full 80Mb sync. Or is it the retransmission being high that is giving me the higher sync rate?
I suppose the only way to change this would be a DLM reset.
[Edit] But even with a PN profile of 73.6Mb I should still get higher test speeds than I do. Is this difference the static IP problem?
@Kevin I wouldn't have thought retransmission high would be a direct cause for your 80mbps sync speed although it may be a contributing factor since it's a form of error correction it may be keeping some errors at bay.
Unfortunately we can only arrange a DLM reset if your sync speed is artificially restricted by a banding.
@Kevin wrote:[Edit] But even with a PN profile of 73.6Mb I should still get higher test speeds than I do. Is this difference the static IP problem?
Sorry I missed your edit earlier. To try to answer your question, if our profile on your account is 73.6mbps this seems to be in line with your 80mbps sync speed with retransmission high on and what your bRAS profile is reporting as.
You've said you're getting a throughput of 71mbps which is about right as you'd struggle to get a throughput that's spot on to the bRAS profile.
Our profile on your account will only affect your throughput if it's set below the bRAS profile of the line (and you have a static IP) which doesn't look to be the case here.
Hi @fwdlink No problem, running a test down your line I can see the current BRAS profile rate is 72.7mbps which is about what I'd expect for a line with high retransmission on and a throughput of 67mbps is about right for that. I think the profile we're reporting in your account at 66.8mbps is just a red herring.
As far as I remember it was retransmission low. I can't give any advice on how to influence DLM to remove this apart from allowing more time I'm afraid however RealAleMadrid and fwdlink seem to think that capping the line speed may help if your router offers this functionality.
For the relatively small loss in speed caused by retransmission you'd have to weigh up whether it's worth the hassle. Or at least that's my personal view.