Virgin Media Community

[barringtono]

My download speeds have been cripplingly slow since yesterday - below 0.2 Mpbs - even using an ethernet cable. Upload speeds are more like 3.5 Mbps.

I'm on the M100 Fibre package and usually have speeds more like 80-90 Mbps; I've not made any hardware changes recently.

I have tried the online service fault test several times, but always returns with no problems. I've also tried resetting the Hub, testing different laptops, WiFi devices and cables.

Thanks for your help.

As requested in the Broadband Speed Check post, diagnostic information from my Hub is pasted below (although Network Log omitted due to exceeding message length limit):

Downstream bonded channels

Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	139000000	-22.3	26	256 qam	1
2	147000000	-22	26	256 qam	2
3	155000000	-21.9	27	256 qam	3
4	163000000	-21.8	27	256 qam	4
5	171000000	-21.7	27	256 qam	5
6	179000000	-21.4	27	256 qam	6
7	187000000	-21.2	27	256 qam	7
8	195000000	-21.2	28	256 qam	8
9	203000000	-21	28	256 qam	9
10	211000000	-21.2	28	256 qam	10
11	219000000	-21	28	256 qam	11
12	227000000	-21	28	256 qam	12
13	235000000	-21.2	28	256 qam	13
14	243000000	-21.2	28	256 qam	14
15	251000000	-21	28	256 qam	15
16	259000000	-21	28	256 qam	16
17	267000000	-20.8	29	256 qam	17
18	275000000	-20.9	29	256 qam	18
19	283000000	-20.9	29	256 qam	19
20	291000000	-20.8	29	256 qam	20
21	299000000	-20.5	29	256 qam	21
22	307000000	-20.5	29	256 qam	22
23	315000000	-20.4	29	256 qam	23
24	323000000	-20.5	29	256 qam	24

Downstream bonded channels

Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	26.4	21557722	62498418
2	Locked	26.6	38983193	45072265
3	Locked	27.1	72437217	11554392
4	Locked	27.3	80274089	3500706
5	Locked	27.4	81649950	1923654
6	Locked	27.8	81824060	187462
7	Locked	27.9	81405479	117954
8	Locked	28.2	77064614	6436
9	Locked	28.4	72292667	763
10	Locked	28.4	70765222	417
11	Locked	28.5	70045596	317
12	Locked	28.6	70066092	323
13	Locked	28.7	62699156	17
14	Locked	28.7	62882482	18
15	Locked	28.7	63079563	34
16	Locked	28.9	60563963	17
17	Locked	29	52021607	1
18	Locked	29.2	47739736	1
19	Locked	29.2	45774009	0
20	Locked	29.3	42557249	0
21	Locked	29.2	48746517	1
22	Locked	29.4	39531639	0
23	Locked	29.6	35578081	0
24	Locked	29.4	38979245	0

Upstream bonded channels    

Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	60300000	4.9	5120	64 qam	1
2	39400000	4.8	5120	64 qam	4
3	46200000	4.825	5120	64 qam	3
4	53700000	4.85	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

[barringtono]

Network Log

Time	Priority	Description
11/05/2020 12:10:52	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:10:33	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:10:8	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:09:48	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:09:20	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:08:33	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:08:4	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:08:2	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:07:56	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:07:54	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:07:16	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:07:12	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:06:12	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:06:1	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:06:0	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:06:0	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:04:59	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:04:42	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:04:21	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/05/2020 12:04:6	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[DJ_Shadow1966 · Accepted solution]

Hello

Yep your power levels on the downstream are well out, can you go around and make sure that all coaxial connections to all VM equipment are finger tight, then power off hub for 30 secs and then back on, if the power levels are still that low then an engineer will be needed to resolve the issue.

Regards Mike

[barringtono]

Thanks for the quick response Mike!

Everything seems to have suddenly started working again without me doing anything (coincidence that it's returned to normal immediately after I posted my question) - re-checking the router status, seems that downstream power is back to normal (all channels between 1 and -1 dBmV).

I guess a local problem that's just been fixed, or possibly a loose connection outside somewhere?

[DJ_Shadow1966]

Hello

Glad it is now working, could have been engineer working om Green Junction box.

Regards Mike