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LoneWolf1152
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SYNC Timing Synchronization failure - Loss of Sync

Hi,

I was just wondering if anyone could shed some light on what exactly is causing the issues on my network, it is completley random btw, most of the time the internet is working fine than randomly there internet drops out and comes back, or keeps dropping out like what happened 2 days ago between  11am-2am. 

I am based in the B27 Area in Birmingham, I never have issues with Virgin Media, the internet is usually working 24/7 without issues, but since 2020 to this year I have had some issues, I don't know if it's because of corona. 

Here is all the logs

 

Downstream bonded channels

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

13310000008.840256 qam25
2267000000943256 qam17
32750000008.640256 qam18
42830000009.140256 qam19
5291000000943256 qam20
62990000008.940256 qam21
73070000009.444256 qam22
83150000008.940256 qam23
93230000008.540256 qam24
103390000008.843256 qam26
113470000008.540256 qam27
123550000008.943256 qam28
133630000008.643256 qam29
143710000008.440256 qam30
153790000008.543256 qam31
163870000008.643256 qam32
173950000008.644256 qam33
184030000008.543256 qam34
194110000008.640256 qam35
20419000000840256 qam36
214270000007.943256 qam37
224350000008.440256 qam38
234430000008.143256 qam39
244510000007.840256 qam40



Downstream bonded channels

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

1Locked40.91299165226247
2Locked43.32095899297440
3Locked40.91535653277658
4Locked40.91832313289274
5Locked43.32148748308027
6Locked40.93273082388204
7Locked43.32277312398099
8Locked40.91805169375873
9Locked40.91521178350005
10Locked43.31231040333957
11Locked40.91138353319179
12Locked43.31061869313304
13Locked43.31187605315398
14Locked40.91128307222042
15Locked43.3846368284856
16Locked43.3880197302469
17Locked44.6936272301357
18Locked43.3878474283540
19Locked40.9984468288287
20Locked40.91579077319745
21Locked43.31403240300118
22Locked40.91030774287053
23Locked43.31101041298201
24Locked40.91055524284688



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LoneWolf1152
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Re: SYNC Timing Synchronization failure - Loss of Sync

Upstream bonded channels

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

16030001943512064 qam9



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0070

 

Network Log

Time Priority Description

09/06/2021 02:56:44Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 00:56:7noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 00:55:50Warning!LAN login FAILED : Incorrect Username / Password / ConnectionType;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 20:25:11criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:58:11Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:58:11criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:57:50Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:57:50criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:54:38Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:54:38criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:54:26Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:54:26criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:51:15Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:51:15criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:51:12Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:51:12criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:46:35Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:46:35criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:46:34Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
08/06/2021 16:46:34criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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LoneWolf1152
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Re: SYNC Timing Synchronization failure - Loss of Sync

An Engineer is coming to check it out on the 15th but just wanted to ask you guy's what you think its wrong with it as I am kind of a computer techie myself and it would be interesting to know what's wrong with it.
I thought maybe it's because our COAX cable for the internet hasn't been changed in over 8 years that maybe that could be causing it.
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lotharmat
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Message 4 of 28
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Re: SYNC Timing Synchronization failure - Loss of Sync

Downstream borderline high - only 1 upstream channel.. Loads of PostRS errors!

To me looks like a totally out of spec upstream and borderline downstream



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LoneWolf1152
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Message 5 of 28
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Re: SYNC Timing Synchronization failure - Loss of Sync

What does this mean though?
Do you think it could be related to a really old COAX cable connected to the router or its mostly and issue with the internet cabinet outside?
I've asked the support to tell the engineer to bring a new COAX cable in case it needs to be replaced due to aged components, the internet was fitted in around 2008 probably in the house, I'm unsure if it was changed in 2012, but from 2012 to now we have been using the same equipment except for the SH3 Upgrade, unsure if it needs to be changed or what....
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lotharmat
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Message 6 of 28
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Re: SYNC Timing Synchronization failure - Loss of Sync

Could be anything - The engineer will be able to diagnose!




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LoneWolf1152
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Message 7 of 28
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Re: SYNC Timing Synchronization failure - Loss of Sync

Here's an update,

Around 2:50pm today I turned the SH3 off for about 10 minutes and turned it back on around 3pm, since then to now here is the updated RS Errors, it started off at 0 but as I can see there is some major issues on the network.

The internet is working fine at the moment, I did a speed test and I am getting the speed I'm supposed to be getting however there are still errors in the logs which I will send after this and I believe there is stil drop outs which show in the logs but since I am not playing any games at the moment I am not noticing them, just browsing and watching videos at the moment.

Downstream bonded channels
Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1 Locked 40.9 65088 66511
2 Locked 40.3 195357 80759
3 Locked 40.9 115932 80827
4 Locked 40.3 146059 84229
5 Locked 40.9 158431 90691
6 Locked 40.3 111604 89200
7 Locked 40.3 81085 81513
8 Locked 40.3 104111 83937
9 Locked 40.9 82407 83203
10 Locked 40.3 79306 78003
11 Locked 40.9 59237 77961
12 Locked 40.3 39449 74607
13 Locked 43.3 45875 71520
14 Locked 40.3 60270 83012
15 Locked 40.9 34822 72140
16 Locked 40.9 34641 77112
17 Locked 43.3 17954 71302
18 Locked 40.9 15489 69614
19 Locked 40.9 15170 67166
20 Locked 40.3 21339 72243
21 Locked 43.3 16229 70121
22 Locked 40.9 12736 68947
23 Locked 40.9 16766 69358
24 Locked 40.3 16649 69086
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LoneWolf1152
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Message 8 of 28
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Re: SYNC Timing Synchronization failure - Loss of Sync

I believe the time is wrong, when it says 17:00pm it actually means 18:00pm Network Log

Time Priority Description

09/06/2021 17:00:11Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 17:00:11criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 16:04:20Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 16:04:20criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 16:04:20Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 15:11:26criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 15:11:12Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 15:11:12criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 15:06:23Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 15:01:1noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:52:47Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:52:47criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:52:45Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:52:45criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:52:43Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:52:43criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:52:42Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:52:42criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 14:07:44Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
09/06/2021 13:51:9criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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lotharmat
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Message 9 of 28
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Re: SYNC Timing Synchronization failure - Loss of Sync

What are the powerlevels like for upstream and downstream?

Post up the rest of the status tabs unless there is a massive SNR problem in the area, I'd expect some dodgy power levels to give that many PostRS errors



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LoneWolf1152
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Message 10 of 28
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Re: SYNC Timing Synchronization failure - Loss of Sync

  
nstream bonded channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1451000000-240256 qam40
2267000000-6.440256 qam17
3275000000-5.540256 qam18
4283000000-5.540256 qam19
5291000000-5.440256 qam20
6299000000-4.440256 qam21
7307000000-3.940256 qam22
8315000000-440256 qam23
9323000000-3.540256 qam24
10331000000-340256 qam25
11339000000-340256 qam26
12347000000-2.440256 qam27
13355000000-1.740256 qam28
14363000000-244256 qam29
15371000000-240256 qam30
16379000000-1.240256 qam31
17387000000-1.543256 qam32
18395000000-1.243256 qam33
19403000000-140256 qam34
20411000000-140256 qam35
21419000000-1.940256 qam36
22427000000-1.744256 qam37
23435000000-1.240256 qam38
24443000000-1.740256 qam39


Downstream bonded channelsChannel Locked Status RxMER (dB) Pre RS Errors   Post RS Errors
1Locked40.3780 22155
2Locked40.3893 26270
3Locked40.3787 27263
4Locked40.9821 30551
5Locked40.9702 32140
6Locked40.3807 30573
7Locked40.9797 29569
8Locked40.9671 28804
9Locked40.9715 29923
10Locked40.9762 27331
11Locked40.9784 28086
12Locked40.3832 27239
13Locked40.9740 25919
14Locked44.6662 25460
15Locked40.3628 25218
16Locked40.9641 24263
17Locked43.3682 24074
18Locked43.3788 24563
19Locked40.9632 25118
20Locked40.3707 23720
21Locked40.9825 23582
22Locked44.6775 23619
23Locked40.3784 22663
24Locked40.3773 23288
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