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rmilkowski
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Message 1 of 18
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1Gbps recently reduced to 30Mbps-50Mbps

Hello,

I was consistenly getting >900Mbps and was a happy customer. In recent days internet download speed are very slow, especially last Friday. Currently I'm getting between 30Mpbs-50Mpbs download speed (over a wired connection) which is nowhere near what I'm used to.

Uploads are fine, I'm still getting just over 50Mbps.

 

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rmilkowski
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

Info from my router/modem.

General Configuration

Network access
true
Maximum Number of CPEs
1
Baseline Privacy
true
DOCSIS Mode
3.1
Config file
cmreg-vmdg640-bbt076-b.cm



Primary Downstream Service Flow

SFID
339392
Max Traffic Rate
1200000450
Max Traffic Burst
42600
Min Traffic Rate
0



Primary Upstream Service Flow

SFID
339391
Max Traffic Rate
55000270
Max Traffic Burst
42600
Min Traffic Rate
0
Max Concatenated Burst
42600
Scheduling Type
bestEffort

 

 

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rmilkowski
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

3.0 Downstream channelsChannel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
61787500000.127.3QAM2566
0138750000-1.524.2QAM2560
0146750000-1.425.2QAM2560
0154750000-0.825.7QAM2560
0162750000-0.626.2QAM2560
5170750000-0.226.7QAM2565
71867500000.227.5QAM2567
81947500000.527.8QAM2568
92027500001.328.4QAM2569
102107500001.628.6QAM25610
112187500001.928.9QAM25611
122267500002.429.2QAM25612
132347500002.728.9QAM25613
142427500003.329.3QAM25614
152507500003.729.6QAM25615
162587500004.229.8QAM25616
172667500004.530.6QAM25617
182747500004.730.6QAM25618
192827500004.730.6QAM25619
202907500004.931.4QAM25620
212987500005.331.3QAM25621
22306750000631.4QAM25622
233147500006.532.2QAM25623
243227500006.931.7QAM25624
253307500007.132.3QAM25625
263707500008.533.5QAM25626
273787500008.533.5QAM25627
283867500008.633.5QAM25628
293947500008.834QAM25629
304027500008.834.3QAM25630
314107500008.633.8QAM25631


3.0 Downstream channelsChannel Lock Status RxMER (dB) Pre RS Errors Post RS Errors
6Locked27.275312205391261344928
0Locked24.19891026857993
0Locked25.19763200
0Locked25.6865101258221920164
0Locked26.15436496896520963780
5Locked26.6787721057484111357174
7Locked27.49387221356195439839
8Locked27.8438282136738850220
9Locked28.35915219229255311
10Locked28.6053771791500149
11Locked28.905008151246141
12Locked29.226856121393350
13Locked28.905008152956521
14Locked29.268816115883790
15Locked29.61995388065970
16Locked29.75931073840900
17Locked30.58905225770650
18Locked30.64657622640560
19Locked30.64657624035450
20Locked31.4037846650990
21Locked31.3353888933260
22Locked31.4037846888900
23Locked32.2371561619870
24Locked31.6886693133160
25Locked32.321487934990
26Locked33.486542102760
27Locked33.48654239440
28Locked33.48654243360
29Locked33.95650920930
30Locked34.3456887840
31Locked33.83416422370


3.1 Downstream channelsChannel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
33864K1680QAM4096424


3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
33Locked369.35625430

 

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lotharmat
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Message 4 of 18
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

That is a massive spread in power levels for D/S!

I'd say that VM need to take a look at that as the PostRS errors are sky high?

When was the hub last rebooted?



------------------------------------------------------------------
Hub 3 - Modem Mode - TP-Link Archer C7

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rmilkowski
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Message 5 of 18
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

Thanks for looking into it.

It was showing 8 days of uptime, but I rebooted it this morning - same issue. I then removed power from it and made sure the cable is attached tightly - same issue.

 

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lotharmat
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Message 6 of 18
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

After talking to an engineer (who came to fix my BB on friday - I'd say that the RxMER (Receive modulation error ratio) is too low on some channels!

It would need VM to fix - Hang tight for a forum rep to respond!



------------------------------------------------------------------
Hub 3 - Modem Mode - TP-Link Archer C7

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thebigmg
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Message 7 of 18
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

Yep similar situation, shocking these past couple of days but overall the last 2 years.

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rmilkowski
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Message 8 of 18
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

I've been realy happy actually with VM since we've join their fiber internet. It's been working reallly great. The last few days though...

I called them yesterday they said I had some wrong settings applied and it should be fixed in about 1hr - several hours later it the issue was still there.

This mornig it was even worse and when I tried to ping 192.168.0.1 (I'm in a modem mode) most of the time it wasn't responding - I couldn't even login to the hub4 via web - it was timing out, etc. This was a new behaviour - never had it before. So I powered it off again, disconnected the coax cable and reconnected it again (did it yesterday - it didn't help). And now I'm consistenly get well over 900Mbps and no Pre/Post RS errors anymore. So perhaps they did change something. Hopefully it stays this way.

 

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

617875000010.636.4QAM2566
113875000011.135.6QAM2561
214675000010.935.6QAM2562
315475000010.935.8QAM2563
416275000010.835.8QAM2564
517075000010.736.6QAM2565
718675000010.436.4QAM2567
819475000010.236.6QAM2568
920275000010.636.6QAM2569
1021075000010.736.6QAM25610
1121875000010.736.6QAM25611
1222675000010.836.6QAM25612
1323475000010.936.4QAM25613
1424275000011.236.6QAM25614
1525075000011.436.6QAM25615
1625875000011.736.4QAM25616
1726675000011.837.4QAM25617
1827475000011.936.6QAM25618
1928275000011.736.6QAM25619
2029075000011.737.4QAM25620
2129875000011.936.6QAM25621
2230675000012.537.4QAM25622
2331475000012.837.6QAM25623
2432275000013.137.4QAM25624
2533075000013.137.6QAM25625
2637075000013.837.6QAM25626
2737875000013.837.6QAM25627
2838675000013.737.6QAM25628
2939475000013.837.6QAM25629
3040275000013.638.6QAM25630
3141075000013.537.6QAM25631

 

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rmilkowski
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

3.0 Downstream channels

Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors

6Locked36.38689000
1Locked35.59507800
2Locked35.59507800
3Locked35.77991100
4Locked35.77991100
5Locked36.60965300
7Locked36.38689000
8Locked36.60965300
9Locked36.60965300
10Locked36.60965300
11Locked36.60965300
12Locked36.60965300
13Locked36.38689000
14Locked36.60965300
15Locked36.60965300
16Locked36.38689000
17Locked37.35598800
18Locked36.60965300
19Locked36.60965300
20Locked37.35598800
21Locked36.60965300
22Locked37.35598800
23Locked37.63627600
24Locked37.35598800
25Locked37.63627600
26Locked37.63627600
27Locked37.63627600
28Locked37.63627650
29Locked37.63627600
30Locked38.60537700
31Locked37.63627600



3.1 Downstream channelsChannel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
33864K1680QAM256424


3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
33Locked4013.700

 

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lotharmat
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Message 10 of 18
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Re: 1Gbps recently reduced to 30Mbps-50Mbps

Yikes - Now the power for d/s is too high across the board and the DOCSIS 3.1 channel is at 256 QAM - Should be 4096!




------------------------------------------------------------------
Hub 3 - Modem Mode - TP-Link Archer C7

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