DLM Reset / Line Cap

[#1]

Hi there,

I had some issues with my line just over 3 months ago resulting in a slight speed decrease due to multiple resyncs, which an engineer visit resolved, he said at the time I should be syncing at 80Mbps but was only syncing at 76Mbps and DLM should sort it out in the coming weeks.

Well it's been 3 months and nothing has happened yet, would it be possible for someone to request a DLM reset on my line please if it's possible, I know I'm only a few Mbps lower than it should be but as you can see from the stats the line is more than capable of the full 79,999 it used to sync at.

Much appreciated, thank you.

[#2]

Hi there! I've just checked and there's no banding in place and the line is syncing at 79.9mbs so a DLM reset won't do anything I'm afraid. 

Have you been connected by WiFi or ethernet when testing the speeds? I ask as the former will always be a few mbps slower by design. 

[#3]

Hi Adam

It's the Plusnet router that's syncing at 76.3 as per my screenshot, it isn't syncing at 79.9 despite what the Plusnet portal is saying.

It definitely used to sync at 79,999 for years before the issues with the line?

Thanks

[#4]

@Icipher Have you tried a single reboot?

[#5]

Hi,

Yep, capped at the exact same rate. (see attachment)

I'm sure a DLM reset will resolve this, as the router is definitely not syncing at 79.9

[#6]

Not doubting you, but what does BTW Performance Tester say if you run the 'Additional Diagnostics'?

[#7]

Hi John

Good idea, see below - that's confirmed my line does have a lower profile applied and I will not be able to get back to 79.9 like it was without some intervention?

[#8]

Yep, for some reason, PN's is set at 73.9 -  only they will be able to tell you why.

[#9]

@jab1  IP Profile is perfectly correct at just under 97% of the sync speed. The problem is the sync speed looks like it is banded, it should not re-sync at the same speed. 

I wonder why @adamwalker thinks it is syncing at 79.9Mbps.🤔

[#10]

Oooops - done it again- sorry @Icipher . Yes, would be good to see where that info came from.

[#11]

It's ok. As long as we are all in agreement it is being capped hopefully Adam or someone can address it.

Thanks both.

[#12 · Accepted solution]

I've been looking into this for you and our tests are 100% showing your line's in sync at 79998 kbps.

Retransmission though is enabled in a high state which can affect your speeds, particularly throughput. 

I've done a DLM reset anyway which should take effect within an hour or so. I'm not confident it'll help, but we shall see.

Let us know how it goes.

[#13]

@Gandalf  Are you sure you are looking at the right line?  The router is syncing at 76.34Mbps and the IP profile is 73.9Mbps which is 96.8% of the sync speed, which is the correct value for retransmission low. Something fishy going on here, your figures are not correct.

[#14]

@RealAleMadrid, I am indeed and I agree that it's odd. I'd done the DLM reset anyway though, so hopefully that's improved the speed and sorted the discrepancy out. 

[#15]

The line did drop around the time you said you did the reset @Gandalf but nothing has changed speed wise as of yet, it just synced straight back as it was.. my understanding which of course may be wrong is that DLM sets the line back to it's max then daily during the night drops it down to what is stable based on the days stats so still not quite sure why the modem in the Hub is only able to sync at 76.34Mbps and your systems seeing 79.99Mbps 🤕