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Crisp_sleeves
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Upload super low at night recently

Hi,

I'm at my wit's end so hoping someone can help me out here, this past week my upload speeds at night and bizarrely in the morning drop substantially. During the day its around 10mbps which is fantastic, at night it can be as low as 0.2mbps. Things I have tested:

Reset router, changed MTU, checked the dbmV readings (upstream stays around 5dBmv... an engineer fitted an attenuator), removed devices from network, turned off wifi entirely.

Downloads were all over the place too at first but now I assume after all my fiddling they now stay rock solid at 110mbps pretty much the entire time.

Running loads of speed test over this week uses google's speed tester the download runs smoothly up the dial but the upload is erratic. It'll spike high, then cut out entirely for a few secs, then wobble all over the shop.

If anyone has any idea what could be going on I'd be super grateful. Thanks very much!

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Tudor
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Re: Upload super low at night recently

5 is right at the top of the allowed range and I believe it’s too high. An attenuators is likely to make it worse not better. Please post all you up and downstream power levels.


Tudor
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2
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Re: Upload super low at night recently

  Downstream bonded channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1306750000-2.437256 qam22
2194750000-1.737256 qam8
3202750000-2.237256 qam9
4210750000-236256 qam10
5218750000-2.233256 qam11
6226750000-2.928256 qam12
7234750000-3.537256 qam13
8242750000-3.737256 qam14
9250750000-337256 qam15
10258750000-2.537256 qam16
11266750000-2.737256 qam17
12274750000-3.437256 qam18
13282750000-3.937256 qam19
14290750000-3.937256 qam20
15298750000-3.237256 qam21
16314750000-1.537256 qam23
17322750000-1.237256 qam24
18402750000-2.737256 qam25
19410750000-2.737256 qam26
20418750000-2.737256 qam27
21426750000-2.237256 qam28
22434750000-237256 qam29
23442750000-237256 qam30
24450750000-2.237256 qam31


Downstream bonded channels
Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked37.370
2Locked37.31070
3Locked37.31041
4Locked36.61001
5Locked33.9610960
6Locked28.4113718651216534250
7Locked37.3470
8Locked37.3110
9Locked37.3130
10Locked37.3140
11Locked37.6170
12Locked37.6230
13Locked37.3230
14Locked37.3100
15Locked37.3120
16Locked37.6100
17Locked37.630
18Locked37.3190
19Locked37.3110
20Locked37.690
21Locked37.360
22Locked37.3180
23Locked37.6190
24Locked37.630

 

 

 

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Re: Upload super low at night recently

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

1462000495.1512064 qam9
2393999715.1512064 qam10
3257999525.1512064 qam12
4326000005.1512064 qam11



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000

 

General Configuration
Network access
Allowed
Maximum Number of CPEs
1
Baseline Privacy
Enabled
DOCSIS Mode
Docsis30
Config file
cmreg-vmdg505-rtsl10016u-b.cm


Primary Downstream Service Flow
SFID1119720
Max Traffic Rate117000047
Max Traffic Burst42600
Min Traffic Rate0


Primary Upstream Service Flow
SFID1119719
Max Traffic Rate10500047
Max Traffic Burst16320
Min Traffic Rate0
Max Concatenated Burst16320
Scheduling TypeBestEffort

 

Also these warnings are new...

Network LogTime Priority Description
22/09/2019 03:33:18criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 03:42:13Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 04:03:44criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 04:08:11Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 04:15:9criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 04:27:36Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 04:32:20criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 04:45:23Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 04:49:29criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 04:57:57Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 05:21:49criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 05:22:31Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 05:40:50criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 05:41:8Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 06:24:35criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 06:47:1Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 06:47:28criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 06:47:58Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 06:49:25criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/09/2019 07:36:5Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

Thanks for replying!! I reset my router again last night and at 9 in the morning my download is no longer consistent , going from 100+ down to 6mbps.. upload is 9 but looking erratic still.

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BrianY
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Re: Upload super low at night recently

5 Locked 33.9 61096 0
6 Locked 28.4 1137186512 16534250
1 46200049 5.1 5120 64 qam 9
2 39399971 5.1 5120 64 qam 10
3 25799952 5.1 5120 64 qam 12
4 32600000 5.1 5120 64 qam 11
2 Problems causing errors:
Signal level channels 5 +6 download below 34dB
Upstream power 5.1 (actual 51dBmV) high.
Both need outside attention by engineer! (Assuming all connections secure)
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Re: Upload super low at night recently

Thanks Brian!! All my connections in here are nice and tight. I just need an engineer now then...

I don't suppose you have any idea why this would happen seemingly out of the blue? Someone messed with some wires outside or something? I'm curious to know how this stuff works!

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Tudor
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Re: Upload super low at night recently

Yep, you need a technician to rectify. There are numerous reasons why this can happen, things like a technician working on the local street cabinet moving connections and down to someone on the cabinet extending their internal cable with non VM cable causing noise ingress for everyone.


Tudor
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2
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Re: Upload super low at night recently

Ah I see, thanks Tudor. May I ask in your experience what's the best way to get through to VM to get a technician? I imagine explaining this to normal customer support a bit tricky.

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Forum Team
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Re: Upload super low at night recently

Good Morning Crisp_sleeves,

 

Thanks for your posts on our Community Forum and a very warm welcome to you!

 

Sorry to see you're having issues with your connection, I'm a member of staff for Virgin Media and I would be happy to look into this for you and book the engineer for you.

 

Please check out the purple envelope in the top right hand corner for a PM from me

 

Kindest regards,

 

David_Bn

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Re: Upload super low at night recently

Hi guys,

Just wanted to say thanks to your help I got a technician who has seemed to have fixed the issue for me. I think he simply changed the attenuator to a forwarding one, and although it’s been a bit wobbly it works great now! Probably would have taken ages to resolve without your knowledge. Have a good one and thanks again!

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