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FarouksTV
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Intermittent Connection: SYNC Timing Synchronization Failure

Someone else on the site has named the issue exactly as mine and I have seen NO effort to get this matter fixed.

It is the usual turn off the router, reset it, disconnect this and that, I have followed and done everything I was told to do, and the one time the technician was to come down, he just gave me a phone ring and said I should get a gaming modem as it is normal to loose connection while playing online.

Than answer was no help at all since I was not touched gaming console or PC in over a week and the issue still persists.

I uses to use a TP link Lan extender and that was no help and I got told to disconnect it which I did.

I lose connection multiple times a day through ethernet and wifi, goes away for a few seconds to several minutes before coming back and it does not matter what I am doing.

This issue has been on for year now and I am really tired but want to give it one last chance to keep my 200 mbps before I seriously consider changing provider.

Last year the router was changed and the issue was still there but with smaller frequency and now it is ALOT worse that it has ever been.

I set up a monitor and there is not a day where the connection does not go off.

 

Network Log

Time Priority Description

05/07/2021 12:30:37ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/07/2021 11:54:53Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/07/2021 11:54:32criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 21:36:25Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 21:12:6criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 20:11:35Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 20:10:52criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 19:40:57Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 19:39:33criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 19:39:13Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 19:38:21criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 19:37:57criticalUnicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 19:37:57criticalRanging Request Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 19:37:14criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 19:27:59Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 16:40:22criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 16:40:10Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 16:38:16criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 16:37:23Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/07/2021 16:37:23criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

https://www.thinkbroadband.com/broadband/monitoring/quality/share/68ce282e68b9c9a42d11c99090ed0aa1a5388db7

Please I need help NOW! 

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FarouksTV
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Re: Intermittent Connection: SYNC Timing Synchronization Failure

FarouksTV_0-1625496455629.png

 This is today.

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conman33158
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Re: Intermittent Connection: SYNC Timing Synchronization Failure

Can you please upload your router stats

Type 192.168.0.1 or (192.168.100.1 if you have your Hub in Modem mode) into your address bar at the top of your browser

Do NOT log in, just click “Check Router Status” at the bottom of the page. Sometimes the “Check Router Status” is missing, in this case just go ahead and log in and go to Advanced Settings-> Tools-> Network Status.

Please copy and paste the contents of the Downstream, Upstream, and Configuration tabs, if you get a yellow warning just click the Post button again.

Do not try to fit everything in one post! You can use more than one post for each configuration tab if needed!

If you get a warning when you hit “Post” just hit “Post” again and it should work ok!

Please do not use screenshots

***********************************************************************************************************************************
Super Hub 4.0 (modem mode) - Gig1 Fibre FTTP - Asus RT-AX82U & Asus RT-AX56U with AiMesh setup
***********************************************************************************************************************************
My Broadband Ping - conman33158
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FarouksTV
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Re: Intermittent Connection: SYNC Timing Synchronization Failure

so this is it

Downstream bonded channels

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

12030000003.740256 qam9
22110000003.740256 qam10
32190000003.740256 qam11
42270000003.740256 qam12
52350000003.740256 qam13
62430000003.540256 qam14
72510000003.740256 qam15
82590000003.540256 qam16
9267000000440256 qam17
102750000003.940256 qam18
112830000003.940256 qam19
122910000004.440256 qam20
13299000000440256 qam21
143070000004.640256 qam22
153150000004.340256 qam23
163230000004.140256 qam24
173310000004.140256 qam25
183390000003.540256 qam26
193470000003.940256 qam27
203550000003.240256 qam28
213630000003.540256 qam29
223710000003.740256 qam30
233790000003.540256 qam31
243870000003.940256 qam32



Downstream bonded channels

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

1Locked40.9271783226437
2Locked40.9250816217198
3Locked40.9228302215102
4Locked40.3225622212786
5Locked40.9210472207057
6Locked40.3189787203224
7Locked40.9176384197287
8Locked40.3166229194571
9Locked40.9160311187024
10Locked40.3153889182571
11Locked40.3143754176495
12Locked40.3137118174491
13Locked40.3128668172489
14Locked40.3123770164438
15Locked40.3119486167269
16Locked40.9114463163265
17Locked40.3109175162480
18Locked40.3106710153730
19Locked40.9104305157932
20Locked40.9101105156548
21Locked40.9100162156580
22Locked40.395697150958
23Locked40.392177151792
24Locked40.388202

145882

 

 

Upstream bonded channels

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

13260000044.8512064 qam5
24620004044.8512064 qam3
33940000044.8512064 qam4



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA00270
2ATDMA00120
3ATDMA00130

 

General Configuration

Network access
Allowed
Maximum Number of CPEs
1
Baseline Privacy
Enabled
DOCSIS Mode
Docsis30
Config file
cmreg-vmdg505-bbt060-b.cm



Primary Downstream Service Flow

SFID68476
Max Traffic Rate230000061
Max Traffic Burst42600
Min Traffic Rate0



Primary Upstream Service Flow

SFID68475
Max Traffic Rate22000061
Max Traffic Burst42600
Min Traffic Rate0
Max Concatenated Burst42600
Scheduling TypeBestEffort

 

Also out of curiosity, why are you using 2 Asus routers? does it contribute to speed?

Thank for taking the time to read this

***********************************************************************************************************************************
Hub 3.0
***********************************************************************************************************************************

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conman33158
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Message 5 of 9
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Re: Intermittent Connection: SYNC Timing Synchronization Failure

You have a lot of Post RS Errors, too many T3 timeouts and you only have 3 upload channels instead of 4.

You will need an engineer visit to put this right. Best to ring Virgin on or just after 8am on 0345 454 1111 or alternatively you can wait here for a Virgin staff member to pick it up, but unfortunately this will typically be between 5-10 days, sometimes sooner, sometimes later depending on how busy they are. If you decide to call it in it will run through a few automated options and after that ring back again and it should recognise that you have rang previously and then put you in the queue for a Virgin representative 🙂

 

In the meantime perform a full factory reset and see how quickly the errors rise. Hold in the pinhole at the rear of the router for at least 50 seconds and then release (the lights will flash while holding in the pinhole reset button after about 10-15 seconds) then allow 5 minutes for the router to reboot and re-sync the connection.
Please ensure that your WiFi network password is still readable on the Hub sticker before you do this or that you at least have a copy of your original network password.

***********************************************************************************************************************************
Super Hub 4.0 (modem mode) - Gig1 Fibre FTTP - Asus RT-AX82U & Asus RT-AX56U with AiMesh setup
***********************************************************************************************************************************
My Broadband Ping - conman33158
lotharmat
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Re: Intermittent Connection: SYNC Timing Synchronization Failure

Is there a known local issue??

Try the 0800 561 0061 number to see if there are any faults!



------------------------------------------------------------------
Hub 3 - Modem Mode - TP-Link Archer C7

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FarouksTV
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Re: Intermittent Connection: SYNC Timing Synchronization Failure

Will try to factory reset it now again.

Also out of curiosity, why are you using 2 Asus routers? does it contribute to speed?

Thank for taking the time to read this

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conman33158
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Message 8 of 9
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Re: Intermittent Connection: SYNC Timing Synchronization Failure


@FarouksTV wrote:

Will try to factory reset it now again.

Also out of curiosity, why are you using 2 Asus routers? does it contribute to speed?


I use them as a mesh system to cover a larger area 🙂

***********************************************************************************************************************************
Super Hub 4.0 (modem mode) - Gig1 Fibre FTTP - Asus RT-AX82U & Asus RT-AX56U with AiMesh setup
***********************************************************************************************************************************
My Broadband Ping - conman33158
FarouksTV
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Re: Intermittent Connection: SYNC Timing Synchronization Failure

Fantastic, thank you!