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madnlooney
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Message 1 of 15
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Random drop off speed and high Post RS Errors

I seem to have a problem with slow speed and looking at router status I have high Post RS Errors.

Also going outside it looks like the neighbour has had a splitter added to my wall box for their install ignoring their box?

I've run a BQM bit I have a Google WiFi mesh so it doesn't run and drops every packet. I think due to not responding to ICMP pings.

Downstream bonded channelsChannel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
12987500003.436256 qam21
21387500003.534256 qam1
3146750000434256 qam2
41547500004.135256 qam3
5162750000435256 qam4
61707500003.735256 qam5
71787500003.235256 qam6
81867500003.235256 qam7
91947500003.235256 qam8
102027500002.735256 qam9
112107500002.235256 qam10
122187500001.735256 qam11
132267500001.235256 qam12
142347500000.535256 qam13
152427500000.535256 qam14
162507500000.735256 qam15
172587500000.935256 qam16
182667500001.535256 qam17
19274750000235256 qam18
202827500002.536256 qam19
212907500002.736256 qam20
223067500003.436256 qam22
233147500003.536256 qam23
243227500003.936256 qam24


Downstream bonded channelsChannel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked36.6790415
2Locked351062761230
3Locked34.9196382830604
4Locked35332980294
5Locked35230794101
6Locked35.514493466
7Locked35.517079252
8Locked3519743362
9Locked35.73850259
10Locked35.59669745
11Locked35.510343062
12Locked35.5121932106
13Locked3519332999
14Locked35.511875215
15Locked35.7599087
16Locked35.510407145
17Locked35.59375514
18Locked35.5913167
19Locked35.52899935
20Locked36.61075023
21Locked36.3525624
22Locked36.322695
23Locked36.6210721
24Locked36.61798

25

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MikeRobbo
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Alessandro Volta
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Message 2 of 15
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Re: Random drop off speed and high Post RS Errors

Your Pre & Post RS Error counts are quite high.

In an ideal world they would be at zero and stay there. To zero them can you reboot the Hub using this method and then keep an eye on the counts.

Switch the Hub off using the small switch on the rear of the Hub next to the power cord and pull the PSU plug from the wall socket.

While the Hub is powered off go around all the accessible co-ax connectors inside and outside to ensure that they are finger tight.

 

Give it a good 5 minutes put the plug back in and switch the Hub back on.

Allow the Hub a few minutes to fully restart then check the counts again in an hour or so.


*********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
BT Smart Hub 2 with 70Mbs Download,18Mbs Upload, 9.17ms Latency & 0.35ms Jitter.
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madnlooney
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Message 3 of 15
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Re: Random drop off speed and high Post RS Errors

I've reset it all and redid all connectors.

It still bugs me that the neighbour install has been put in a splitter from my box 

 

IMG_20210112_155913_optimized.jpg

IMG_20210112_155927_optimized.jpg

 ill keep an eye on the status but don't hold much breath as I've done them recently.

26mb on last speed test. Only 230mb short

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MikeRobbo
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Alessandro Volta
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Re: Random drop off speed and high Post RS Errors

What speeds do you get at >>  SamKnows << with a direct connection using a Cat 5E or better ethernet cable between the Hub in Router Mode and a 1Gbs capable Pc/Mac/Chromebook and no other devices connected ?

Then immediately after …

Can you Login to the Hub Settings and navigate to the Connected Devices page - what is the reported 'connection speed’ for the ethernet cable connected device you used for the speed test ?


*********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
BT Smart Hub 2 with 70Mbs Download,18Mbs Upload, 9.17ms Latency & 0.35ms Jitter.
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madnlooney
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Message 5 of 15
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Re: Random drop off speed and high Post RS Errors

The router is used in modern mode.

Here is today's blistering speed

Latency

156 ms

Jitter

134 ms

Download

2.33 Mbps

Upload

23.8 Mbps

 

 

 

 

 

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madnlooney
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Message 6 of 15
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Re: Random drop off speed and high Post RS Errors

Couple more tests

Latency 106 ms

Jitter 87.2 ms

Download 10.1 Mbps

Upload 24.4 Mbps

Latency

125 ms

Jitter

104 ms

Download

20.1 Mbps

Upload

26.6 Mbps

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MikeRobbo
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Message 7 of 15
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Re: Random drop off speed and high Post RS Errors


@madnlooney wrote:

I've reset it all and redid all connectors.

It still bugs me that the neighbour install has been put in a splitter from my box 

 

IMG_20210112_155913_optimized.jpg

IMG_20210112_155927_optimized.jpg

 ill keep an eye on the status but don't hold much breath as I've done them recently.

26mb on last speed test. Only 230mb short


As a minimum that junction box should be covered up, if there is no proper cover use a piece of thick plastic and some duct tape to try and prevent water ingress.


*********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
BT Smart Hub 2 with 70Mbs Download,18Mbs Upload, 9.17ms Latency & 0.35ms Jitter.
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MikeRobbo
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Alessandro Volta
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Message 8 of 15
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Re: Random drop off speed and high Post RS Errors

Can you put the Hub into Router Mode for speed testing purposes please.

then

What speeds do you get at >>  SamKnows << with a direct connection using a Cat 5E or better ethernet cable between the Hub in Router Mode and a 1Gbs capable Pc/Mac/Chromebook and no other devices connected ?

Then immediately after …

Can you Login to the Hub Settings and navigate to the Connected Devices page - what is the reported 'connection speed’ for the ethernet cable connected device you used for the speed test ?


*********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
BT Smart Hub 2 with 70Mbs Download,18Mbs Upload, 9.17ms Latency & 0.35ms Jitter.
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madnlooney
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Message 9 of 15
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Re: Random drop off speed and high Post RS Errors

This evening it is better, but still not what is expected.
It seems during the day to be next to nothing all day and really causing problems
Tested tonight on wifi
Latenc 30.6 ms
Jitter 9.00 ms
Download 108 Mbps
Upload 34.0 Mbps

This is through wired connecting in router mode

Latency
21.0 ms
Jitter
5.39 ms
Download
97.3 Mbps
Upload
36.3 Mbps

Device name ESKTOP-7C3CHIS
MAC address **:**:**:**:**:**
IP address 192.168.0.11/24
Speed (Mbps) 1000
Connected to Ethernet

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MikeRobbo
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Message 10 of 15
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Re: Random drop off speed and high Post RS Errors

Can you please

Type 192.168.0.1 (192.168.100.1 in Modem mode) into your browser URL bar and press enter. 

Hub 2 & 3 When the page appears DO NOT LOG IN but click ‘Check Router Status’.

Hub 4 When the page appears LOG IN then Advanced Settings > Tools > Network Status.

Copy and paste the contents of the Downstream, Upstream, Configuration and Network Log tabs onto here, if you get a yellow / straw box warning click the Post button again.

Use one post for each tab if you wish.

Please do not use screen shots.

A Guru will be along soon to decipher the info.


*********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
BT Smart Hub 2 with 70Mbs Download,18Mbs Upload, 9.17ms Latency & 0.35ms Jitter.
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