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Message 1 of 17
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Loss of upload for 5 - 10 seconds regularly

Hi,

Connection has been flawless for so long I can't remember, until the last 10 days I keep getting an issue, noticable when online gaming on any game. I can still see others moving and can here people talk to me on VOIP but I can't reply or move my character etc.

To me this indicates a loss of upload, I will then usually get disconnected or if short enough it will come back.

Your help is greatly appreciated. I would say it happens around 4 or 5 times a night, restarting the hub doesn't resolve the issue.

There is absolutely nothing in the logs.

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Message 2 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

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

1435000000-3.538256 qam4
2411000000-3.538256 qam1
3419000000-3.538256 qam2
4427000000-3.538256 qam3
5443000000-3.738256 qam5
6451000000-3.738256 qam6
7459000000-3.538256 qam7
8467000000-3.538256 qam8
9475000000-3.540256 qam9
10483000000-3.538256 qam10
11491000000-3.538256 qam11
12499000000-3.738256 qam12
13507000000-3.938256 qam13
14515000000-3.738256 qam14
15523000000-3.938256 qam15
16531000000-438256 qam16
17539000000-438256 qam17
18547000000-4.238256 qam18
19555000000-4.238256 qam19
20563000000-438256 qam20
21571000000-4.238256 qam21
22579000000-4.238256 qam22
23587000000-4.438256 qam23
24595000000-4.238256 qam24



Downstream bonded channels

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

1Locked38.916984139690
2Locked38.612167146387
3Locked38.616020140919
4Locked38.917467142302
5Locked38.914837148008
6Locked38.610701169258
7Locked38.615297158600
8Locked38.616478146053
9Locked40.314874145157
10Locked38.913083151040
11Locked38.910225151521
12Locked38.99593149141
13Locked38.96931152349
14Locked38.96754155008
15Locked38.94661117872
16Locked38.95362161055
17Locked38.65029157636
18Locked38.94698159225
19Locked38.94443117428
20Locked38.64505130174
21Locked38.94716159842
22Locked38.95049121488
23Locked38.94848122693
24Locked38.94257158850
 
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Message 3 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

Upstream bonded channels

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

1394000393.625512064 qam2
2258000003.575512032 qam4
3326000003.475512064 qam3
4462000003.625512032 qam1


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
;fg87dsfd;kfoA,.iyewrkldJKDHSU



Primary Downstream Service Flow

SFID26190
Max Traffic Rate230000000
Max Traffic Burst42600
Min Traffic Rate0



Primary Upstream Service Flow

SFID26185
Max Traffic Rate12700000
Max Traffic Burst16320
Min Traffic Rate0
Max Concatenated Burst16320
Scheduling TypeBestEffort

 

Cable Modem StatusItem Status Comments

Acquired Downstream Channel (Hz)
435000000
Locked
Ranged Upstream Channel (Hz)
39400039
Locked
Provisioning State
Online
 
 
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Message 4 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

Network LogTime Priority Description

20/06/2019 00:40:23Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 00:40:24criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 00:40:26Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 00:40:26criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 00:40:26Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 00:40:27criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 00:40:27Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 01:21:47criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 03:08:57criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 03:08:57Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 03:15:36criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:05:48Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:05:48criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:05:48Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:32:49criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:39:54criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:39:54Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:54:5criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:54:5Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 04:56:27criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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Message 5 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

Happened twice in 5 minutes just now, nothing in the logs for this time. Unless its behind by 1 hour in the logs:

 

20/06/2019 21:49:34criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2019 21:49:34Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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Message 6 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

The large number of Post RS errors for the downstream channels and the RCS Partial service errors in the log are not healthy.  I suspect the logs are on GMT rather than BST so that would explain the hour difference.

This will need a technician to visit you to investigate and sort these issues.  You can call VM and try to book a visit or wait for the VM staff to get to this thread and they can help you book a visit.  It may take the staff a few days to get to this thread.

______________________
Scott

Disclaimer - I don't work for Virgin Media. I'm just another VM user trying to help out.
My setup: V6 TV box, Vivid 200 Optical fibre with Hub 3 in modem mode connected to a Netgear R7000 router. Telewest/VM user since 2001.

As a Very Insightful Person, I'm here to share my knowledge. I don't work for Virgin Media.

Click to learn more about VIP

Use Kudos to say thanks

 

Mark as Helpful Answer if I've helped

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Message 7 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

Thanks for your message, have a technician booked for Tuesday as they agreed with your diagnosis.

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Message 8 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

Technician out today, he said he's cleaned the fibre ends and balanced the upload streams. Said to keep an eye on it over the next few weeks and report back if I'm still having issues. Concerned that my upload speed on 200mb is bouncing between 5-8mb on speedtest depending on the different server but might be related to the change.

 

Note the engineer was here between 3:20pm and 4pm.

 

Cable Modem StatusItem Status Comments

Acquired Downstream Channel (Hz)
435000000
Locked
Ranged Upstream Channel (Hz)
39399979
Locked
Provisioning State
Online
 
 
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Message 9 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

Downstream bonded channels

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

1435000000-138256 qam4
2411000000-1.238256 qam1
3419000000-138256 qam2
4427000000-1.238256 qam3
5443000000-1.238256 qam5
6451000000-1.240256 qam6
7459000000-1.238256 qam7
8467000000-1.238256 qam8
9475000000-1.240256 qam9
10483000000-1.240256 qam10
11491000000-138256 qam11
12499000000-1.240256 qam12
13507000000-1.540256 qam13
14515000000-1.440256 qam14
15523000000-1.538256 qam15
16531000000-1.540256 qam16
17539000000-1.540256 qam17
18547000000-1.738256 qam18
19555000000-1.938256 qam19
20563000000-1.540256 qam20
21571000000-1.938256 qam21
22579000000-1.738256 qam22
23587000000-238256 qam23
24595000000-1.740256 qam24



Downstream bonded channels

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

1Locked38.972634995
2Locked38.968606360
3Locked38.697956945
4Locked38.963734742
5Locked38.962724294
6Locked40.367494047
7Locked38.963703634
8Locked38.962414393
9Locked40.359614448
10Locked40.358764375
11Locked38.959392413
12Locked40.354894419
13Locked40.357632381
14Locked40.354352619
15Locked38.952874192
16Locked40.354154212
17Locked40.351693987
18Locked38.953252338
19Locked38.649003915
20Locked40.351305295
21Locked38.947413743
22Locked38.949145109
23Locked38.9516910211
24Locked40.359498979
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Message 10 of 17
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Re: Loss of upload for 5 - 10 seconds regularly

Upstream bonded channels

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

1393999793.275512064 qam2
2258000003.275512064 qam4
3326000003.275512064 qam3
4461999933.325512064 qam1



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000
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