Virgin Media Community

[hingus2000]

Hi all

I appreciate this sort of post is fairly common. We were upgraded from M200 to M500 as part of our retention deal. However we have seen literally no change in speeds. We get reliably 130-190mbps virtually every speed test we conduct, both pre and post upgrade. The upgrade hasn't changed anything at all.

I'm wondering if there may be an issue with the line which is causing a ceiling at around 200mbps. The router status is showing a Max Traffic Rate of 575000000 so the upgrade has notionally been pushed to the router. 

Router status details are below. Any assistance/comments would be appreciated.

Cable Modem StatusItem Status Comments

Acquired Downstream Channel (Hz)	387000000	Locked
Ranged Upstream Channel (Hz)	32599990	Locked
Provisioning State	Online

Downstream bonded channels

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

1	387000000	2.7	38	256 qam	32
2	203000000	1.5	36	256 qam	9
3	211000000	1.2	37	256 qam	10
4	219000000	1.5	31	256 qam	11
5	227000000	1.2	31	256 qam	12
6	235000000	1	37	256 qam	13
7	243000000	1.2	37	256 qam	14
8	251000000	1	37	256 qam	15
9	259000000	0.7	37	256 qam	16
10	267000000	0.5	37	256 qam	17
11	275000000	1.2	37	256 qam	18
12	283000000	1	37	256 qam	19
13	291000000	1	37	256 qam	20
14	299000000	0.7	37	256 qam	21
15	307000000	0.9	37	256 qam	22
16	315000000	1.7	37	256 qam	23
17	323000000	2.2	38	256 qam	24
18	331000000	2.7	38	256 qam	25
19	339000000	3	38	256 qam	26
20	347000000	2.5	38	256 qam	27
21	355000000	3.2	38	256 qam	28
22	363000000	2.9	38	256 qam	29
23	371000000	3	38	256 qam	30
24	379000000	3.4	38	256 qam	31

Downstream bonded channels

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

1	Locked	38.6	590	196
2	Locked	36.6	1168	0
3	Locked	37.6	995	0
4	Locked	31.4	36263014	341
5	Locked	31.4	71378789	38967
6	Locked	37.6	973	0
7	Locked	37.6	773	0
8	Locked	37.6	867	0
9	Locked	37.6	770	0
10	Locked	37.3	596	0
11	Locked	37.3	846	0
12	Locked	37.6	1085	0
13	Locked	37.6	624	0
14	Locked	37.6	662	0
15	Locked	37.6	371	0
16	Locked	37.9	344	0
17	Locked	38.6	521	0
18	Locked	38.6	208	0
19	Locked	38.6	182	0
20	Locked	38.6	612	0
21	Locked	38.6	209	0
22	Locked	38.6	287	0
23	Locked	38.6	1122	0
24	Locked	38.6	9063	44042

Upstream bonded channels

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

1	32599990	51	5120	64 qam	5
2	46199939	51	5120	64 qam	3
3	39399977	51	5120	64 qam	4
4	25799957	50.8	5120	32 qam	6

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	1	0
2	ATDMA	0	0	1	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	2	0

[hingus2000]

General Configuration

Network access	Allowed
Maximum Number of CPEs	1
Baseline Privacy	Enabled
DOCSIS Mode	Docsis30
Config file	cmreg-vmdg505-bbt053+voc-b.cm

Primary Downstream Service Flow

SFID	491914
Max Traffic Rate	575000000
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	491913
Max Traffic Rate	38520000
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	16320
Scheduling Type	BestEffort

Network Log

Time Priority Description

21/01/2021 12:45:19	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/01/2021 01:27:53	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/01/2021 13:13:28	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
19/01/2021 12:24:51	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/01/2021 00:45:18	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 16:38:51	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 14:29:3	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 11:19:2	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 00:11:13	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 08:56:11	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:41	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 01:58:52	notice	SW download Successful - Via NMS
15/01/2021 01:57:15	notice	SW Download INIT - Via NMS
14/01/2021 18:11:28	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/01/2021 18:25:30	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/01/2021 22:09:47	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/01/2021 19:15:0	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:38	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/01/2021 18:43:42	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/01/2021 22:35:42	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[Anonymous]

You've got a couple of issues with your line, which is probably the reason you aren't seeing much difference in speed (Your config appears to have updated):

• SNR is 'off' on two downstream channels (1000's of errors recorded).
• One of your upstream channels is out of spec on QAM.
• Power levels on your upstream channels is very high.

Have you checked your speeds on a wired device?

Downstream bonded channels

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

1	Locked	38.6	590	196
2	Locked	36.6	1168	0
3	Locked	37.6	995	0
4	Locked	31.4	36263014	341
5	Locked	31.4	71378789	38967
6	Locked	37.6	973	0
7	Locked	37.6	773	0
8	Locked	37.6	867	0
9	Locked	37.6	770	0
10	Locked	37.3	596	0
11	Locked	37.3	846	0
12	Locked	37.6	1085	0
13	Locked	37.6	624	0
14	Locked	37.6	662	0
15	Locked	37.6	371	0
16	Locked	37.9	344	0
17	Locked	38.6	521	0
18	Locked	38.6	208	0
19	Locked	38.6	182	0
20	Locked	38.6	612	0
21	Locked	38.6	209	0
22	Locked	38.6	287	0
23	Locked	38.6	1122	0
24	Locked	38.6	9063	44042

Upstream bonded channels

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

1	32599990	51	5120	64 qam	5
2	46199939	51	5120	64 qam	3
3	39399977	51	5120	64 qam	4
4	25799957	50.8	5120	32 qam	6

[hingus2000]

Thanks Carl.

I suppose I'd have to speak to VM to try and get those issues fixed? Something which is virtually impossible at the moment without a 90 minute wait time on the phone!

I haven't yet tried a wired device as both our laptops are USB C only and don't have an ethernet port. Will dust off the Raspberry Pi and wire that into the router to check wired speeds.