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Zephyntor
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Message 1 of 22
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Bad Upload speed + DNS errors in Area 15

Hi,

  So since the weekend (possibly Friday) we've had terrible upload speeds on our M500 connection. Various speed tests have given between 340 and 450 Mbps down, which is fine obviously. But Upload speeds are hovering around 0.1 Mbps sometimes as high as 0.4, which is not fine. Especially as its meant to be around 36.

It's a wired connection, tried restarting everything etc. So all the usual boxes are ticked. HUB3 which is in modem mode.

It is also having intermittent DNS probe errors popping up and just weird failures when loading stuff, which I've not been able to work out if they're handshake issues or some post loading thing on various pages where it uploads requests and they fail or if its the DNS. I can probably switch to OpenDNS or Google DNS to eliminate that issue though.

 

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Zephyntor
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Re: Bad Upload speed + DNS errors in Area 15

Downstream:

Downstream bonded channels

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

1299000000-1.937256 qam21
2203000000-0.537256 qam9
3211000000-0.937256 qam10
4219000000-0.935256 qam11
5227000000-1.233256 qam12
6235000000-1.437256 qam13
7243000000-1.537256 qam14
8251000000-1.537256 qam15
9259000000-1.937256 qam16
10267000000-1.937256 qam17
11275000000-2.237256 qam18
12283000000-2.437256 qam19
13291000000-2.237256 qam20
14307000000-1.938256 qam22
15315000000-237256 qam23
16323000000-237256 qam24
17331000000-1.937256 qam25
18339000000-1.937256 qam26
19347000000-1.937256 qam27
20355000000-1.538256 qam28
21363000000-1.738256 qam29
22371000000-238256 qam30
23379000000-2.238256 qam31
24387000000-2.238256 qam32



Downstream bonded channels

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

1Locked37.6212978
2Locked37.37112247
3Locked37.64501092
4Locked3510812894
5Locked33.9371702920
6Locked37.63373325
7Locked37.33447143
8Locked37.33437296
9Locked37.64317125
10Locked37.64957015
11Locked37.65037023
12Locked37.64326955
13Locked37.62846973
14Locked38.61917473
15Locked37.61727501
16Locked37.61357603
17Locked37.6937617
18Locked37.3867335
19Locked37.6797755
20Locked38.6817728
21Locked38.61387865
22Locked38.9897045
23Locked38.6986673
24Locked38.931519223
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Zephyntor
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Re: Bad Upload speed + DNS errors in Area 15

Upstream bonded channels

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

13260136040512016 qam5
24620030140.8512016 qam3
33939958040.3512016 qam4
42580067040.3512016 qam6



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0030
2ATDMA0000
3ATDMA0000
4ATDMA00820

 

Network Log

Time Priority Description

01/06/2021 16:26:19noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:08:0criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:06:8Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:04:5Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:04:1criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:04:1Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:04:0criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:30Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:29criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:28Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:28criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:28Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:24criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:24Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:24criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:03:20Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:02:28Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:02:24criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:02:23Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/06/2021 15:02:23criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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Zephyntor
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Message 4 of 22
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Re: Bad Upload speed + DNS errors in Area 15

Also as a side note. The automated help systems and bots on the main website are utterly useless. They offer advice on moving the HUB around to improve Wifi, after having been told its a wired connection. Then it asks about the light colours on the HUB3 and does not include the magenta light for Modem mode, which then just loops you back to the beginning unable to add any proper description of the actual issue. Very frustrating.
Jonny-M
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Message 5 of 22
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Re: Bad Upload speed + DNS errors in Area 15

You've got noise on the upstream. Check all the connectors are tight and then wait for someone from VM to confirm whether this is an area fault or whether they are going to book an engineer. If it's an area fault it could take months to resolve, VM do not do anything quickly.

Edit: If you have neighbours on VM that are also showing 16QAM on the upstream channels then it's likely an area fault.

Zephyntor
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Message 6 of 22
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Re: Bad Upload speed + DNS errors in Area 15

Ah thanks for confirming! Sadly I tightened everything and reset everything several times before even contacting VM, none of the automated website stuff would admit any fault in the area or with my connection nor did the reply to the complaint I sent them.

So we'll see. Thanks though. Good to get someone technical take a look.

Interestingly before I switched back from Linux for work when I tried pinging google several times I was getting between 10-15% packet loss which probably explains everything misbehaving.
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Zak_M
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Message 7 of 22
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Re: Bad Upload speed + DNS errors in Area 15

Good evening @Zephyntor 

 

Welcome to the forums and thank you so much for taking the time to post. 

 

I have managed to take a look over your account and it seems that you have been suffering form an outage, on the plus side the notes say that this should have been fixed today. 

 

Can you pinhole re-set the hub and monitor over the next 24 hours. 

 

Kind regards,

Zak_M

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Zephyntor
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Message 8 of 22
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Re: Bad Upload speed + DNS errors in Area 15

Hi,

No need to pinhole reset the hub, the issue got fixed yesterday as I looked at the status and someone's complaining (not mine as I was told it was fine even though it wasn't) got them to fix the issue. Back to 500Mbs (sometimes 400) down and 37Mbps up.

Thanks

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Zak_M
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Message 9 of 22
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Re: Bad Upload speed + DNS errors in Area 15

Thanks for letting me know.

 

Glad things are looking up.

 

If we are able to assist you further then please do let me know.

 

Kind regards,

Zak_M

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Zephyntor
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Message 10 of 22
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Re: Bad Upload speed + DNS errors in Area 15

It's once again happening. 

500Mbps has been reduced to 100Mbps down which I'm unhappy about but its functional. However the upload speed has again dropped to 0.1-0.5Mbps making most usage on the net basically unusable. Checked again and there's similar amounts of noise on the upstream channels.

There's no easy way to just register the fact anywhere. The service status checker claims everything is fine. Then

https://www.virginmedia.com/help/virgin-media-slow-wifi-connection/how-are-you-connected 

If you click wired it takes you to a trouble shooter for wifi. Is it actually trying to actively make people angry? 
Then that (https://www.virginmedia.com/help/virgin-media-slow-wifi-connection) asks the colour of the light on the HUB3 but doesn't include the modem mode one. Then proceeds to try and make you move wifi devices about when I said they're wired.

 

 

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