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Internet speed heavily fluctuating

Just switched over to Virgin, we get amazing speeds sitting up to 220mb/s but every 20/30minutes or so the speed either disconnects or drops to ~2mbs then sits at 20-30mb/s before jumping back up temporarily and repeat.

This happens across all my devices, my iMac is plugged in via Ethernet and my phone&ps4 experience the same issues across the Wifi Network

I've ran a BQS and these are the resultse2472a36a2de6eea191f0d9a3f510753c12f7328-26-01-2020 (1).png

 

Here's some speed tests I ran at 2am (not peak time) that show the issue

IMG_7405.PNGIMG_7406.PNGIMG_7407.PNG

 
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Re: Internet speed heavily fluctuating

Cable Modem Status

Cable Modem StatusItem Status Comments
Acquired Downstream Channel (Hz)
187000000
Locked
Ranged Upstream Channel (Hz)
60299733
Locked
Provisioning State
Online

 

Downstream bonded channels
1187000000136256 qam7
21390000002.435256 qam1
31470000000.535256 qam2
41550000002.236256 qam3
51630000002.236256 qam4
61710000002.436256 qam5
7179000000236256 qam6
81950000002.537256 qam8
92030000000.736256 qam9
102110000002.237256 qam10
112190000001.527256 qam11
122350000002.237256 qam13
132430000003.237256 qam14
142510000002.737256 qam15
152590000003.237256 qam16
162670000003.237256 qam17
172750000002.537256 qam18
182830000003.437256 qam19
192910000003.537256 qam20
202990000005.337256 qam21
213070000003.737256 qam22
223150000005.438256 qam23
233230000004.337256 qam24


Downstream bonded channels
1Locked36.345668236609
2Locked35.71342179726
3Locked35.7113702118910
4Locked36.3917195912
5Locked36.31441276698
6Locked36.613117610215
7Locked36.3524252269796
8Locked37.61030939470
9Locked36.61157478083
10Locked37.61267693378
11Locked27.570798875177511412
12Locked37.38153297
13Locked37.36151190
14Locked37.34653346
15Locked37.313787442
16Locked37.3548380
17Locked37.33731105
18Locked37.6301590
19Locked37.6191765
20Locked37.3209138
21Locked37.3220024
22Locked38.6202242
23Locked37.6171427
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Re: Internet speed heavily fluctuating

Upstream bonded channels

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

1602997334.9512016 qam1
2537001425.196512016 qam2
3394001445.075512032 qam4
4462001095.1512032 qam3



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-rtsxxl35016u+voc-b.cm



Primary Downstream Service Flow

SFID121724
Max Traffic Rate402500089
Max Traffic Burst42600
Min Traffic Rate0



Primary Upstream Service Flow

SFID121723
Max Traffic Rate38500089
Max Traffic Burst42600
Min Traffic Rate0
Max Concatenated Burst42600
Scheduling TypeBestEffort

 

 

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Re: Internet speed heavily fluctuating

Network Log

26/01/2020 10:07:5Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:07:6Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:07:25Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:07:26Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:07:33Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:07:41Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:08:47Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:08:48Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:09:23Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:09:26Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:10:27Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:10:28Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:11:57Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:12:0Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:12:15Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:12:15Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:12:45Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:12:46Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:12:53Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2020 10:12:55Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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Message 5 of 11
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Re: Internet speed heavily fluctuating

Thank you for your post Oosanders and sorry to hear you're experiencing some broadband issues.

 

Have you contacted our team in regards to this since your post? 

 

If you still require some assistance could you please confirm if your Hub is in modem mode? 

 

Let us know, Emily.

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Message 6 of 11
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Re: Internet speed heavily fluctuating

Hi Emily,

I haven't contacted anyone, I was going to await your recommendation on this forum before doing so.

Our hub is in Router mode as we use it on both Wifi + Ethernet

 

Thanks,

 

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Re: Internet speed heavily fluctuating

No problem, if this is the case I'd like to take a look into the account so I'll pop you over a private message.

 

Can you please respond to this by going to the purple envelope in the top right of your screen.

 

Thank you, Emily.

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Re: Internet speed heavily fluctuating

Upstream power is too high and Downstream channels are showing noise ingress, especially Channel 11.

You will need an engineer to sort this out. However in the meantime, check all connections are tight and there are no unterminated ends anywhere on the cables.

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Re: Internet speed heavily fluctuating

In this case there's a known area fault relating to SNR, the information on this was given over private message.

 

Thank you for your assistance though @Adduxi.

 

Thank you, Emily.

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Message 10 of 11
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Re: Internet speed heavily fluctuating

Hi Emily,

 

Maybe you can help me too.  I am experiencing a similar issue.  I had a 500MB service installed last Saturday.  It mostly runs around 60-90MB but can, as few times a day, jump to 500MB+ (and then go back down to 60-90MB a few mins later). Most of the time, the service is slow.

I have an engineer coming next week but is there anything I can do myself or that I can raise directly with the engineer when they turn up?

Thanks,

Keith

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