Upgraded to 1GIG & Concerned

[khudson2022]

Hey there,

I upgraded to 1GIG setup the new hub 4, put it into modem mode as I have a Netgear Nighthawk X6 AC300, more then good enough for 1GIG internet.

On testing it seems like I can only achieve 650MB internet? I have tried this on Modem and Router mode.

Can anyone clarify or does it take time for the speed to pick up? As it's only been activated today.

https://www.dropbox.com/s/2z3a8pg6zwvirj6/Screenshot%202022-02-22%20at%2016.20.39.png?dl=0

[khudson2022]

Ah that's good to know then. Still not able to get the speed above 620MB.

When I try just using a lan cable it is not working the internet doesn't seem to come through to my MAC. I have the ethernet plugged into port 1 on the hub, where my ASUS router was plugged in.

[Andrew-G]

Post (as text) the hub's status data for Downstream.  At 620 Mbps I wonder if the hub is having problems with the single DOCSIS 3.1 channel,  Post the data when the hub's been running for a good few hours after a restart.

[digitaldaz]

I had exactly the same with my pfsense router.

What did it for me was changing the MTU on the WAN interface to 1470 my speeds are now solidly in the 900+ range.

[khudson2022]

You changed this on your router and not the hub? I can check it out later today when I am back in.

[khudson2022]

I will do this later today it should have been running for a solid 8 hours by the time I get back. Thanks for your response.

[digitaldaz]

Yes I changed the MTU on the pfsense Virgin Media interface, the hub is in bridge mode so nothing to change.

I had had the 500Mb business service for well over a year too and though I often got the 500Mb, the speed was often fluctuating too. I know now that changing the MTU would probably have fixed that.

Also, mss clamping if that is available to the same value.

[khudson2022]

3.0 Downstream channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
25 331000000 5.2 40.4 QAM256 25
6 179000000 4.7 40.9 QAM256 6
7 187000000 4.6 40.4 QAM256 7
8 195000000 4.7 40.4 QAM256 8
9 203000000 4.7 40.4 QAM256 9
10 211000000 4.8 40.9 QAM256 10
11 219000000 4.8 40.4 QAM256 11
12 227000000 4.8 40.9 QAM256 12
13 235000000 4.8 40.4 QAM256 13
14 243000000 4.8 40.9 QAM256 14
15 251000000 4.8 40.4 QAM256 15
16 259000000 5 40.4 QAM256 16
17 267000000 5.3 40.9 QAM256 17
18 275000000 5.2 40.9 QAM256 18
19 283000000 5 40.9 QAM256 19
20 291000000 5.2 40.4 QAM256 20
21 299000000 5.4 40.9 QAM256 21
22 307000000 5.5 40.4 QAM256 22
23 315000000 5.2 40.9 QAM256 23
24 323000000 5.2 40.9 QAM256 24
26 339000000 5.6 40.9 QAM256 26
27 347000000 5.9 40.4 QAM256 27
28 355000000 5.7 40.9 QAM256 28
29 363000000 5 40.4 QAM256 29
30 371000000 4.8 40.9 QAM256 30
31 379000000 4.8 40.4 QAM256 31
32 387000000 5.2 40.4 QAM256 32
33 395000000 5.5 40.4 QAM256 33
34 403000000 5.4 40.4 QAM256 34
35 411000000 5.5 40.9 QAM256 35
36 419000000 5.3 40.4 QAM256 36

3.0 Downstream channels
Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors
25 Locked 40.366287 0 0
6 Locked 40.946209 0 0
7 Locked 40.366287 0 0
8 Locked 40.366287 0 0
9 Locked 40.366287 0 0
10 Locked 40.946209 0 0
11 Locked 40.366287 0 0
12 Locked 40.946209 0 0
13 Locked 40.366287 0 0
14 Locked 40.946209 0 0
15 Locked 40.366287 0 0
16 Locked 40.366287 0 0
17 Locked 40.946209 0 0
18 Locked 40.946209 0 0
19 Locked 40.946209 0 0
20 Locked 40.366287 0 0
21 Locked 40.946209 0 0
22 Locked 40.366287 0 0
23 Locked 40.946209 0 0
24 Locked 40.946209 0 0
26 Locked 40.946209 0 0
27 Locked 40.366287 0 0
28 Locked 40.946209 0 0
29 Locked 40.366287 0 0
30 Locked 40.946209 0 0
31 Locked 40.366287 0 0
32 Locked 40.366287 0 0
33 Locked 40.366287 0 0
34 Locked 40.366287 0 0
35 Locked 40.946209 0 0
36 Locked 40.366287 0 0

3.1 Downstream channels
Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
37 96 4K 1880 QAM4096 759

3.1 Downstream channels
Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
37 Locked 43 4.9 59929488 0

[khudson2022]

Tried the MTU at 1470 no difference, it was set to 1500 prior.

[Blueyonderer]

I'm not sure how accurate fast.com is but it's currently overestimating my connection speed by around 300Mbps:

I normally use the Ookla Speedtest Windows desktop app, which seems to be consistent (A MacOS version is also available).

Also, I had similar problems with a previous Asus router and it was cured by enabling Hardware Acceleration (it may have been NAT Acceleration - it was under the switch control section, iirc. I would have been running Merlin firmware on it at the time, though, so your interface may be slightly different).

Edit: Scratch that last paragraph - I read Netgear and thought Asus... more coffee required!

Cheers.

BY

[Andrew-G]

@khudson2022 Regarding posted hub status data, that's all good in terms of power and noise, and shows the DOCSIS 3.1 channel is present and apparently working.  Unfortunately there's a bug in the firmware which means the hub doesn't report downstream errors properly on the D 3.0 channels, so we can't tell if there's a noise ingress problem on those channels, which would be a possible cause.