Hub 3.0 SYNC Timing Synchronization failure and RCS Partial Service errors

[tomo8281]

Hi all, over the past month my Hub 3 router has become more and more unrealiable in terms of internet stability and latency. I have a Windows PC that is plugged directly into the router via Ethernet. I have the M200 Fibre Broadband package and have recently been getting around 15-50 Mbps:

There are other devices on my network but nothing downloading or causing other activity.

However my speeds are not the issue, it's the error log in my router status:

21/09/2021 19:55:49	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:55:48	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:54:47	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:53:47	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:52:1	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:59	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:58	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:58	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:58	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:38	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:38	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:37	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:37	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:36	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:36	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:34	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:34	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:33	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:31	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/09/2021 19:51:30	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

I get these Sync Timing Failure and RCS partial Service errors all day long, with random latency errors too and spikes. 

Here are my other router stats:

Downstream bonded channels
Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	147000000	-0.9	40	256 qam	2
2	155000000	-0.5	40	256 qam	3
3	163000000	-0.5	38	256 qam	4
4	171000000	0.2	40	256 qam	5
5	179000000	0.4	40	256 qam	6
6	187000000	0.2	40	256 qam	7
7	195000000	0.4	40	256 qam	8
8	203000000	0	40	256 qam	9
9	211000000	-0.2	40	256 qam	10
10	219000000	-0.5	38	256 qam	11
11	227000000	-0.7	40	256 qam	12
12	235000000	-0.5	40	256 qam	13
13	243000000	-0.5	40	256 qam	14
14	251000000	-0.5	40	256 qam	15
15	259000000	-0.5	40	256 qam	16
16	267000000	-0.4	40	256 qam	17
17	275000000	-0.2	40	256 qam	18
18	283000000	0	40	256 qam	19
19	291000000	0	40	256 qam	20
20	299000000	0.2	40	256 qam	21
21	307000000	-0.2	40	256 qam	22
22	315000000	0	40	256 qam	23
23	323000000	0	40	256 qam	24


Downstream bonded channels
Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	40.9	9160693	2708227
2	Locked	40.3	10183274	2721463
3	Locked	38.9	9723426	3643753
4	Locked	40.9	10402721	4277133
5	Locked	40.9	6116476	453848
6	Locked	40.9	9041255	1616879
7	Locked	40.9	9545870	2207988
8	Locked	40.3	7552805	889202
9	Locked	40.9	7917316	1056479
10	Locked	38.6	9966032	2902479
11	Locked	40.3	9491599	3204529
12	Locked	40.3	8455846	1399378
13	Locked	40.3	6804677	679626
14	Locked	40.9	5556183	370228
15	Locked	40.3	4701373	236543
16	Locked	40.3	3256033	87864
17	Locked	40.3	2113563	26129
18	Locked	40.3	2019493	24291
19	Locked	40.3	1388084	8015
20	Locked	40.3	951525	2134
21	Locked	40.3	1038150	3063
22	Locked	40.3	527011	255
23	Locked	40.9	132350	0


Upstream bonded channels
Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	60300000	51	5120	64 qam	1
2	39400000	51	5120	64 qam	4
3	53700000	51	5120	64 qam	2
4	46200010	51	5120	64 qam	3


Upstream bonded channels
Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
1	ATDMA	0	0	5	0
2	ATDMA	0	0	34	0
3	ATDMA	0	0	12	0
4	ATDMA	0	0	11	0

Can VM please help, can I get an engine out to look at these issues? I've called 0800 561 0061 and there are no service issues in my area either. I've also hard reset my router and I still get the errors.

Thanks a lot for any help.

[Paulina_Z]

Hi @tomo8281,

Thank you for coming back to us in regards to your ongoing issue. I have been able to locate your account and run some checks on your power levels. I can see that there are some issues with your upstream power levels and that they are not looking so great. 

As we cannot resolve this issue remotely, we will need to send out a technician. I will send you a Private Message to confirm some details before I can do this, so please keep an eye out for a purple envelope at the top right corner of your forum page. I will be in touch soon.

Thank you,

[tomo8281]

Hi - thanks a lot, the technician came out yesterday and did a bit more troubleshooting - he said it's all good now but could the forum please check these new power levels?

Downstream bonded channels
Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	139000000	4.6	40	256 qam	1
2	147000000	5.1	40	256 qam	2
3	155000000	5.4	40	256 qam	3
4	163000000	5.5	40	256 qam	4
5	171000000	5.6	40	256 qam	5
6	179000000	5.5	40	256 qam	6
7	187000000	5.5	40	256 qam	7
8	195000000	5.5	40	256 qam	8
9	203000000	5.4	40	256 qam	9
10	211000000	5.1	40	256 qam	10
11	219000000	5	40	256 qam	11
12	227000000	4.5	40	256 qam	12
13	235000000	4.5	40	256 qam	13
14	243000000	4.5	40	256 qam	14
15	251000000	4.9	40	256 qam	15
16	259000000	5	40	256 qam	16
17	267000000	5.1	40	256 qam	17
18	275000000	5.1	40	256 qam	18
19	283000000	5.4	40	256 qam	19
20	291000000	5.5	40	256 qam	20
21	299000000	5.8	40	256 qam	21
22	307000000	5.5	40	256 qam	22
23	315000000	5.5	40	256 qam	23
24	323000000	5.6	40	256 qam	24


Downstream bonded channels
Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	40.3	9	0
2	Locked	40.3	18	0
3	Locked	40.9	5	0
4	Locked	40.9	6	0
5	Locked	40.9	20	0
6	Locked	40.3	26	0
7	Locked	40.9	21	0
8	Locked	40.9	19	0
9	Locked	40.3	13	0
10	Locked	40.3	8	0
11	Locked	40.3	10	0
12	Locked	40.3	10	0
13	Locked	40.3	7	0
14	Locked	40.3	33	0
15	Locked	40.9	21	0
16	Locked	40.9	5	0
17	Locked	40.9	8	0
18	Locked	40.3	7	0
19	Locked	40.3	12	0
20	Locked	40.3	26	0
21	Locked	40.9	15	0
22	Locked	40.9	6	0
23	Locked	40.9	22	0
24	Locked	40.3	13	0

Upstream bonded channels
Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	60300000	45.5	5120	64 qam	1
2	39400000	44.3	5120	64 qam	4
3	46200000	44.5	5120	64 qam	3
4	53700000	45	5120	64 qam	2


Upstream bonded channels
Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0

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


Primary Downstream Service Flow
SFID	305662
Max Traffic Rate	230000061
Max Traffic Burst	42600
Min Traffic Rate	0


Primary Upstream Service Flow
SFID	305661
Max Traffic Rate	22000061
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	42600
Scheduling Type	BestEffort

Thanks so much! 

[Akua_A · Accepted solution]

Thank you for the update @tomo8281.

I am glad to hear our technician was able to help regarding this. I have had a look back end into your power levels and everything seems to be working well. In this case, please continue to monitor your service and let us know if you need any further help.

Thanks,

[tomo8281]

Thanks so much. I've marked this issue as solved and can be considered closed 

Thanks again.

[Steven_L]

Glad to hear that @tomo8281 and please let us know if you have any further issues.

Regards,

Steven_L

[tomo8281]

Hi all,

Happy new year - however I am back again with some problems. Last night the internet was terrible - really slow, had to reboot a few times, just wasnt working. I logged onto the router status and saw a LOT of post rs Errors - so I went to bed, woke up this morning and did a power cycle of the router to then post it's status on here to see if anything is wrong. Can someone have a look at below and see if everything is okay? I dont currently have any post rs errors as the uptime is only 2hours or so since reboot. Thanks so much!

Network Log
Time	Priority	Description
07/01/2022 11:45:17	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:36	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
06/01/2022 21:37:31	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
06/01/2022 12:19:54	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/01/2022 12:06:23	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/01/2022 11:53:9	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/01/2022 11:53:9	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/01/2022 11:53:6	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/01/2022 11:53:6	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/01/2022 11:53:6	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/01/2022 11:53:6	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/01/2022 02:26:51	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/12/2021 20:23:32	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/12/2021 19:35:31	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/12/2021 09:12:59	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/12/2021 03:45:10	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/12/2021 21:12:59	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/12/2021 09:12:44	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/12/2021 09:11:49	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/12/2021 09:07:48	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

Upstream bonded channels
Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	60300000	45.5	5120	64 qam	1
2	46200000	44.8	5120	64 qam	3
3	39400000	44.5	5120	64 qam	4
4	53700000	45.3	5120	64 qam	2


Upstream bonded channels
Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0

Downstream bonded channels
Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	203000000	5.6	40	256 qam	9
2	211000000	5.5	40	256 qam	10
3	219000000	5.4	40	256 qam	11
4	227000000	5	40	256 qam	12
5	235000000	4.9	40	256 qam	13
6	243000000	4.8	40	256 qam	14
7	251000000	5	40	256 qam	15
8	259000000	5.4	40	256 qam	16
9	267000000	5.6	40	256 qam	17
10	275000000	5.5	40	256 qam	18
11	283000000	5.9	40	256 qam	19
12	291000000	6	40	256 qam	20
13	299000000	6.4	40	256 qam	21
14	307000000	6	40	256 qam	22
15	315000000	6.1	40	256 qam	23
16	323000000	6.3	40	256 qam	24
17	331000000	6.5	40	256 qam	25
18	339000000	6.8	40	256 qam	26
19	347000000	6.5	40	256 qam	27
20	355000000	6.4	40	256 qam	28
21	363000000	6	40	256 qam	29
22	371000000	5.8	40	256 qam	30
23	379000000	5.9	40	256 qam	31
24	387000000	6	40	256 qam	32


Downstream bonded channels
Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	40.3	5	0
2	Locked	40.3	6	0
3	Locked	40.9	6	0
4	Locked	40.3	5	0
5	Locked	40.9	5	0
6	Locked	40.3	6	0
7	Locked	40.9	0	0
8	Locked	40.9	6	0
9	Locked	40.3	5	0
10	Locked	40.3	5	0
11	Locked	40.3	6	0
12	Locked	40.9	5	0
13	Locked	40.3	5	0
14	Locked	40.9	6	0
15	Locked	40.9	7	0
16	Locked	40.3	5	0
17	Locked	40.9	5	0
18	Locked	40.3	6	0
19	Locked	40.9	5	0
20	Locked	40.3	5	0
21	Locked	40.3	4	0
22	Locked	40.3	7	0
23	Locked	40.3	4	0
24	Locked	40.9	0	0

Cable Modem Status
Item	Status	Comments
Acquired Downstream Channel (Hz)	
203000000
Locked
Ranged Upstream Channel (Hz)	
60300000
Locked
Provisioning State	
Online

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


Primary Downstream Service Flow
SFID	442344
Max Traffic Rate	230000061
Max Traffic Burst	42600
Min Traffic Rate	0


Primary Upstream Service Flow
SFID	442343
Max Traffic Rate	22000061
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	42600
Scheduling Type	BestEffort

[Zach_R]

Hi @tomo8281,

I'm so sorry to hear that the issues with your connection have returned. Using the details you've provided when signing up to the forums, I've taken a look and can't see any known area impacting faults currently. Are your issues ongoing today?

If they are, would you mind trying a factory reset of the router to see if that helps at all?

Thanks,