Virgin Media Community

[Roboraver7]

Hi

Can any helpful bod advise please ?

Have just joined on the V.VIP package 2 days ago, my street cabinet is not even 50 meters away from my house but for the life of me I cannot get more then 200 meg down when hard wired directly into the router, here are my stats:

Cable Modem StatusItem Status Comments

Acquired Downstream Channel (Hz)	298750000	Locked
Ranged Upstream Channel (Hz)	53700072	Locked
Provisioning State	Online

Down stream:

Downstream bonded channels

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

1	298750000	4	38	256 qam	21
2	194750000	4.3	38	256 qam	8
3	202750000	4.1	38	256 qam	9
4	210750000	4	38	256 qam	10
5	218750000	4	38	256 qam	11
6	226750000	4	38	256 qam	12
7	234750000	3.9	38	256 qam	13
8	242750000	3.7	38	256 qam	14
9	250750000	3.9	38	256 qam	15
10	258750000	3.7	38	256 qam	16
11	266750000	3.9	38	256 qam	17
12	274750000	3.7	38	256 qam	18
13	282750000	3.9	38	256 qam	19

Upstream:

Upstream bonded channels

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

1	53700072	4.85	5120	64 qam	2
2	46199955	4.8	5120	64 qam	3
3	39399932	4.775	5120	64 qam	4
4	60300113	4.85	5120	64 qam	1

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

Gen config:

General Configuration

Network access	Allowed
Maximum Number of CPEs	1
Baseline Privacy	Enabled
DOCSIS Mode	Docsis30
Config file	cmreg-vmdg505-rtsxxxl500u+voc-b.cm

Primary Downstream Service Flow

SFID	254148
Max Traffic Rate	575000000
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	254147
Max Traffic Rate	38520000
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	16320
Scheduling Type	BestEffort

Network LOG (Have removed my MAC address):

Network Log

Time Priority Description

01/01/1970 00:01:39	critical	No Ranging Response received - T3 time-out;CM-;CM-QOS=1.1;CM-VER=3.0;
21/05/2019 13:23:21	notice	SW Download INIT - Via Config file
21/05/2019 13:26:3	Error	Disruption during SW download - Power Failure
21/05/2019 13:26:17	notice	SW Download INIT - Via Config file
21/05/2019 13:28:26	notice	SW download Successful - Via Config file
21/05/2019 14:36:25	Warning!	RCS Partial Service;CM-;CM-QOS=1.1;CM-VER=3.0;
21/05/2019 14:36:26	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-;CM-QOS=1.1;CM-VER=3.0;
21/05/2019 14:36:26	Warning!	RCS Partial Service;CM-;CM-QOS=1.1;CM-VER=3.0;
21/05/2019 14:36:26	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-;CM-QOS=1.1;CM-VER=3.0;
21/05/2019 14:36:31	Warning!	Lost MDD Timeout;CM-;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:38	critical	No Ranging Response received - T3 time-out;CM-;CM-QOS=1.1;CM-VER=3.0;
21/05/2019 22:33:11	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-;CM-QOS=1.1;CM-VER=3.0;
21/05/2019 22:33:12	critical	No Ranging Response received - T3 time-out;CM-;CM-QOS=1.1;CM-VER=3.0;
22/05/2019 03:00:43	notice	Unit has been restored to factory defaults from a software issued command;CM-;CM-QOS=1.1;CM-VER=3.0;
22/05/2019 08:17:27	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-;CM-QOS=1.1;CM-VER=3.0;
22/05/2019 08:17:28	Warning!	RCS Partial Service;CM-;CM-QOS=1.1;CM-VER=3.0;
22/05/2019 08:17:28	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-;CM-QOS=1.1;CM-VER=3.0;
22/05/2019 08:17:28	Warning!	RCS Partial Service;CM-;CM-QOS=1.1;CM-VER=3.0;
22/05/2019 08:17:33	Warning!	Lost MDD Timeout;CM-;CM-QOS=1.1;CM-VER=3.0;
22/05/2019 08:19:34	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-;CM-QOS=1.1;CM-VER=3.0;

Do I need to wait for a few days like Fibre for the line to settle or should it be up to speed immediately ??

[jpeg1 · Accepted solution]

The signal levels are fine, but you are only showing 13 download channels instead of 30, which would explain the low speed.

Did you cut off the bottom channels in the list when you copied and pasted them, or is that the actual number? 

If there really are only 13 channels, try resetting the Hub with the reset button for 30 seconds. If that doesn't bring them all up, call it in as a fault on 150.

[Roboraver7]

Hi jpeg

thanks for the reply, it looks like it is only enabled for 24:

Downstream bonded channels

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

1	298750000	4.1	38	256 qam	21
2	194750000	4.5	38	256 qam	8
3	202750000	4.4	38	256 qam	9
4	210750000	4.3	38	256 qam	10
5	218750000	4.3	38	256 qam	11
6	226750000	4.3	38	256 qam	12
7	234750000	4.1	38	256 qam	13
8	242750000	4	38	256 qam	14
9	250750000	4	38	256 qam	15
10	258750000	4	38	256 qam	16
11	266750000	4	38	256 qam	17
12	274750000	4	38	256 qam	18
13	282750000	4.1	38	256 qam	19
14	290750000	4	38	256 qam	20
15	306750000	4.4	38	256 qam	22
16	314750000	4.4	38	256 qam	23
17	322750000	4.6	38	256 qam	24
18	402750000	4.6	38	256 qam	25
19	410750000	5	38	256 qam	26
20	418750000	4.4	38	256 qam	27
21	426750000	4.5	38	256 qam	28
22	434750000	4.1	38	256 qam	29
23	442750000	4	38	256 qam	30
24	450750000	3.9	38	256 qam	31

Should there be 30 ?

[jpeg1]

I'm not familiar with the 500Mbit channels. It may be 24 - someone will pop up and confirm.

How is the speed now? 

[Roger_Gooner]

The hub 3.0 has a DOCSIS 3.0 modem which handles 24 downstream channels, more channels are only possible with 3.1.

[griffin · Accepted solution]

The number of channels is governed by the Hub as the Hub 3 has a 24 channel downstream tuner (192Mhz), and 4 upstream channel tuner.(24MHz)
Asus do a 32 x 8 Cable Modem for use with American ISPs like Comcast and Xfinity.
There is no specification for the maximum amount of downstream channels in Docsis 3.0

Docsis 3.1 works differently, with one downstream channel utilising many OFDM sub carriers can be the same size as 24 Docsis 3.0 downstream channels.(192Mz)

The logs are showing a couple of periods, of noise on the downstream, but nothing to explain consistent failure to achieve headline speed.

I would start a Broadband Quality Monitor to get a more detailed picture on how your connection is performing.
I would also test with a PC in Safe Mode with Networking to help rule out anything running on your PC.

[jpeg1]

The OP originally showed only 13 channels. If that was correct and there are now 24 there may no longer be a problem.

We need an update.

[Roboraver7]

Sorry but am not at home at the moment but will check when I get back in a hour, thanks for your advice, just was not sure if cable was similar to FTTC with a settling in period.

[Roboraver7]

Am back now:

Downstream:

1	298750000	2.5	38	256 qam	21
2	194750000	2.9	38	256 qam	8
3	202750000	2.7	38	256 qam	9
4	210750000	2.7	38	256 qam	10
5	218750000	2.5	38	256 qam	11
6	226750000	2.5	38	256 qam	12
7	234750000	2.5	38	256 qam	13
8	242750000	2.4	38	256 qam	14
9	250750000	2.2	38	256 qam	15
10	258750000	2.2	38	256 qam	16
11	266750000	2.2	38	256 qam	17
12	274750000	2.2	38	256 qam	18
13	282750000	2.2	38	256 qam	19
14	290750000	2.2	38	256 qam	20
15	306750000	2.4	38	256 qam	22
16	314750000	2.5	38	256 qam	23
17	322750000	2.5	38	256 qam	24
18	402750000	2.2	38	256 qam	25
19	410750000	2.5	38	256 qam	26
20	418750000	2	38	256 qam	27
21	426750000	2	38	256 qam	28
22	434750000	1.7	38	256 qam	29
23	442750000	1.7	38	256 qam	30
24	450750000	1.7	38	256 qam	31

Downstream bonded channels

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

1	Locked	38.9	60	0
2	Locked	38.9	69	0
3	Locked	38.9	45	0
4	Locked	38.6	35	0
5	Locked	38.6	27	0
6	Locked	38.6	45	0
7	Locked	38.6	44	0
8	Locked	38.6	52	0
9	Locked	38.6	65	0
10	Locked	38.6	40	0
11	Locked	38.6	46	0
12	Locked	38.9	35	0
13	Locked	38.9	32	0
14	Locked	38.6	37	0
15	Locked	38.9	28	0
16	Locked	38.9	29	0
17	Locked	38.9	33	0
18	Locked	38.6	37	0
19	Locked	38.9	83	0
20	Locked	38.9	38	0
21	Locked	38.9	47	0
22	Locked	38.9	30	0
23	Locked	38.9	73	0
24	Locked	38.9	50	0

[Roboraver7]

cont:

Upstream:

Upstream bonded channels

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

1	53699959	4.85	5120	64 qam	2
2	46199917	4.8	5120	64 qam	3
3	39399895	4.775	5120	64 qam	4
4	60299866	4.85	5120	64 qam	1

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 config:

General Configuration

Network access	Allowed
Maximum Number of CPEs	1
Baseline Privacy	Enabled
DOCSIS Mode	Docsis30
Config file	cmreg-vmdg505-rtsxxxl500u+voc-b.cm

Primary Downstream Service Flow

SFID	254148
Max Traffic Rate	575000000
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	254147
Max Traffic Rate	38520000
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	16320
Scheduling Type	BestEffort

Ookla speedtest to Virgin London:

 PING ms

12

 DOWNLOAD Mbps

259.38

 UPLOAD Mbps

30.14