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Unstable network

Hi,

I have serious network stability issues for a past 2 weeks (despite nationwide issue) which drops the ping to impossible levels (500+) and speed goes down to 0.5-1Mbps DL.

It's nowhere near my 200Mbps I am paying for and to be honest was ok when I was on 150. No drops like that ever happened.

I've upgraded recently to SuperHub3 and after WiFi tests I've connected AC88U as wifi provider leaving SH3 as modem.
Tests were made on ethernet cable connected to SH3 directly to avoid speculation on WiFi games.

Screenshot 2020-05-03 at 21.59.34.jpg

 

 

 

EDIT: images seem to be not working at all

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Re: Unstable network

Network log:

 

Time Priority Description

03/05/2020 21:25:34Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:34criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:32Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:32criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:32Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:32criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:31Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:18Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:14criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:14Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:25:14criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:24:59Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:24:59criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:24:55Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:24:55criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:24:25Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:24:7criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:24:7Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/05/2020 21:24:7criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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Re: Unstable network

Upstream

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

1537000004.2512064 qam2
2603000004.2512064 qam1
3462000004.15512064 qam3
4394000004.125512064 qam4

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000
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Re: Unstable network

Downstream

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

11390000006.538256 qam1
21470000006.138256 qam2
3155000000638256 qam3
4163000000638256 qam4
5171000000638256 qam5
6179000000638256 qam6
71870000005.938256 qam7
81950000005.938256 qam8
92030000005.638256 qam9
102110000005.838256 qam10
112190000005.838256 qam11
122270000005.638256 qam12
132350000005.438256 qam13
142430000004.938256 qam14
152510000004.938256 qam15
16259000000538256 qam16
172670000005.138256 qam17
18275000000538256 qam18
192830000005.438256 qam19
202910000005.538256 qam20
21299000000638256 qam21
223070000006.138256 qam22
233150000006.338256 qam23
243230000006.338256 qam24



Downstream bonded channels

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

1Locked38.6126713032
2Locked38.6114113035
3Locked38.666313075
4Locked38.9253714891
5Locked38.9285014248
6Locked38.649414232
7Locked38.694212712
8Locked38.9107411623
9Locked38.671913622
10Locked38.650812139
11Locked38.961313269
12Locked38.6287015146
13Locked38.6170812273
14Locked38.6136411863
15Locked38.939759052
16Locked38.9256010237
17Locked38.687133091
18Locked38.683583028
19Locked38.678885065
20Locked38.6250410859
21Locked38.676665341
22Locked38.987413713
23Locked38.680523869
24Locked38.980614873
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Message 5 of 7
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Re: Unstable network

Fault check also stopped working, it dies after about 15% and says to connect the main cable (which is how it works in the first way).

Any help?

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Very Insightful Person
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Message 6 of 7
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Re: Unstable network


@patso wrote:

EDIT: images seem to be not working at all


Images need to be approved before they are visible to everyone.  Normally they should be visible to you as the uploader, but a bug in the current forum code prevents even you seeing them until they are approved.  If you see yellow triangles in place of your images then they are fine and just awaiting approval.  If any of them are showing a red circle with a diagonal line through it then that image has been rejected.

In your case your image was rejected to protect your privacy as it contained your WAN IP address, which is against the forum rules.  There are share options on the Speedtest results page that allow you to share your results without exposing your IP address.

 

The power levels on your hub look OK, but the almost constant "RCS Partial Service" errors in the log is unhealthy as is the large number of Post RS errors on the downstream.

This will probably need an engineer to visit and investigate.  You can try calling to report this, not easy to get through right now I know, or wait for one of the forum team to pick this up.  Can't say how long it will take them to get here though as staff are stretched during the current crisis.

______________________
Scott

My setup: V6 TV box, M350 Fibre broadband with Hub 3 in modem mode connected to a Netgear R7000 router. Telewest/VM user since 2001.

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

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Message 7 of 7
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Re: Unstable network

Hi Patso,

 

Sorry to hear about the broadband issues you're experiencing and understand it may be frustrating for you. I'm going to send you a Private Message so I can take a look at your network on our side, please reply back to it so I can help.

 

Thanks,

 

Lisa