Virgin Media Community

[Steve120]

Hi,

I have the 1gig package and since yesterday I’ve been barely getting above 50Mbps down and 1 Mbps up, often a lot less making it unusable. 

Hub is in modem mode and Speedtests were run directly on the router (net gear Orbi)

Prior to this download speeds were always 700Mbps and uploads 50 Mbps

[Steve120]

3.0 Downstream channelsChannel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1	139000000	7.4	36.4	QAM256	1
2	147000000	7.1	36.4	QAM256	2
3	155000000	6.7	36.4	QAM256	3
4	163000000	6.4	36.4	QAM256	4
5	171000000	6.6	36.4	QAM256	5
6	179000000	7	36.4	QAM256	6
7	187000000	6.7	36.4	QAM256	7
8	195000000	5.5	35.8	QAM256	8
9	203000000	5.3	35.8	QAM256	9
10	211000000	5.3	35.8	QAM256	10
11	219000000	5.7	36.4	QAM256	11
12	227000000	5.6	36.4	QAM256	12
13	235000000	5.3	36.6	QAM256	13
14	243000000	5.2	36.4	QAM256	14
15	251000000	5.4	36.4	QAM256	15
16	259000000	5.4	36.6	QAM256	16
17	267000000	5.3	36.6	QAM256	17
18	275000000	5.3	36.6	QAM256	18
19	283000000	5.2	36.4	QAM256	19
20	291000000	5	36.6	QAM256	20
21	299000000	4.6	36.4	QAM256	21
22	307000000	4.2	36.6	QAM256	22
23	315000000	4.1	36.4	QAM256	23
24	323000000	4.5	36.4	QAM256	24
25	331000000	4.6	36.4	QAM256	25
26	339000000	4.6	36.4	QAM256	26
27	347000000	4.6	36.6	QAM256	27
28	355000000	4.3	35.8	QAM256	28
29	363000000	3.9	36.4	QAM256	29
30	371000000	3.2	35.8	QAM256	30
31	379000000	3.1	35.8	QAM256	31

3.0 Downstream channelsChannel Lock Status RxMER (dB) Pre RS Errors Post RS Errors

1	Locked	36.386890	0	0
2	Locked	36.386890	0	0
3	Locked	36.386890	1	0
4	Locked	36.386890	3637	0
5	Locked	36.386890	0	0
6	Locked	36.386890	0	0
7	Locked	36.386890	0	0
8	Locked	35.779911	10	0
9	Locked	35.779911	0	0
10	Locked	35.779911	0	0
11	Locked	36.386890	72	0
12	Locked	36.386890	0	0
13	Locked	36.609653	0	0
14	Locked	36.386890	1	0
15	Locked	36.386890	0	0
16	Locked	36.609653	0	0
17	Locked	36.609653	0	0
18	Locked	36.609653	0	0
19	Locked	36.386890	0	0
20	Locked	36.609653	0	0
21	Locked	36.386890	0	0
22	Locked	36.609653	0	0
23	Locked	36.386890	0	0
24	Locked	36.386890	0	0
25	Locked	36.386890	0	0
26	Locked	36.386890	0	0
27	Locked	36.609653	0	0
28	Locked	35.779911	0	0
29	Locked	36.386890	8	0
30	Locked	35.779911	3	0
31	Locked	35.779911	2	0

3.1 Downstream channelsChannel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)

159

96

4K

1880

QAM4096

759

3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

40

11.5

542308

0

[Steve120]

Refresh data

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

1	39400000	39.8	5120 KSym/sec	64QAM	4
2	25800000	37.8	5120 KSym/sec	64QAM	6
3	32600000	38.8	5120 KSym/sec	64QAM	5
4	46200000	39.3	5120 KSym/sec	64QAM	3

3.0 Upstream channelsChannel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	0	0
2	US_TYPE_STDMA	0	0	1	0
3	US_TYPE_STDMA	0	0	0	0
4	US_TYPE_STDMA	0	0	0	0

[Steve120]

this is a set of recent error logs, but they are similar to this ever since we got this hub. 

Tue 26/01/2021 01:52:07	6	DHCP Renew - lease parameters tftp file-cmreg-vmdg640-bbt076-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 28/01/2021 16:08:54	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 29/01/2021 13:52:07	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 29/01/2021 13:52:07	6	DHCP Renew - lease parameters tftp file-cmreg-vmdg640-bbt076-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 29/01/2021 19:22:25	3	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 29/01/2021 19:22:31	6	CM-STATUS message sent. Event Type Code: 23; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sun 31/01/2021 11:03:08	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[conman33158 · Accepted solution]

3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

40

11.5

542308

0

3.1 downstream power level is too high. You will need an engineer visit to put this right. Best to ring VM on or just after 8am or alternatively you can wait here for a Virgin staff member to pick it up, typically between 5-10 days, sometimes sooner, sometimes later depending on how busy they are.

[Steve120]

Thanks for this.

I happen to have a 6db attenuator, so I’ve put that in.

do these levels look better?

3.0 Downstream channelsChannel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

40	451000000	-1	36.6	QAM256	40
10	211000000	-0.6	35.6	QAM256	10
11	219000000	-0.1	36.4	QAM256	11
12	227000000	0	36.4	QAM256	12
13	235000000	-0.4	36.4	QAM256	13
14	243000000	-0.8	36.4	QAM256	14
15	251000000	-0.8	35.8	QAM256	15
16	259000000	-1.1	36.4	QAM256	16
17	267000000	-1.2	36.4	QAM256	17
18	275000000	-1.3	36.4	QAM256	18
19	283000000	-1.6	36.4	QAM256	19
20	291000000	-1.8	36.6	QAM256	20
21	299000000	-2.4	35.8	QAM256	21
22	307000000	-2.5	36.4	QAM256	22
23	315000000	-2.6	35.8	QAM256	23
24	323000000	-2.1	36.4	QAM256	24
25	331000000	-1.9	35.8	QAM256	25
26	339000000	-1.9	35.8	QAM256	26
27	347000000	-2	35.8	QAM256	27
28	355000000	-1.9	35.8	QAM256	28
29	363000000	-2	35.6	QAM256	29
30	371000000	-2.4	35.8	QAM256	30
31	379000000	-2.6	35.6	QAM256	31
32	387000000	-2.4	35.6	QAM256	32
33	395000000	-2	36.4	QAM256	33
34	403000000	-2.2	35.8	QAM256	34
35	411000000	-2.2	36.4	QAM256	35
36	419000000	-2	36.4	QAM256	36
37	427000000	-1.4	36.4	QAM256	37
38	435000000	-1.4	36.4	QAM256	38
39	443000000	-1.6	36.6	QAM256	39

3.0 Downstream channelsChannel Lock Status RxMER (dB) Pre RS Errors Post RS Errors

40	Locked	36.609653	0	0
10	Locked	35.595078	0	0
11	Locked	36.386890	1	0
12	Locked	36.386890	2107	0
13	Locked	36.386890	1	0
14	Locked	36.386890	0	0
15	Locked	35.779911	1	0
16	Locked	36.386890	1	0
17	Locked	36.386890	1	0
18	Locked	36.386890	0	0
19	Locked	36.386890	12	0
20	Locked	36.609653	0	0
21	Locked	35.779911	0	0
22	Locked	36.386890	0	0
23	Locked	35.779911	0	0
24	Locked	36.386890	1	0
25	Locked	35.779911	0	0
26	Locked	35.779911	0	0
27	Locked	35.779911	1	0
28	Locked	35.779911	1	0
29	Locked	35.595078	0	0
30	Locked	35.779911	3	0
31	Locked	35.595078	1	0
32	Locked	35.595078	3	0
33	Locked	36.386890	0	0
34	Locked	35.779911	1	0
35	Locked	36.386890	0	0
36	Locked	36.386890	0	0
37	Locked	36.386890	1	0
38	Locked	36.386890	0	0
39	Locked	36.609653	0	0

3.1 Downstream channelsChannel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)

159

96

4K

1880

QAM4096

759

3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

40

5.3

105601143

397

[conman33158 · Accepted solution]

Yeah that looks better 🙂

[Steve120]

Thanks for your help. 

a hub reset + the attenuator seems to have done the job for now, hopefully it will continue to behave 😀

[conman33158]

Nice one mate, hopefully it has been a quick fix 🙂