Virgin Media Community

[jabster78]

Hi,

I’ve been experiencing slow speeds and high latency (including packet loss) on my M100. I’ve got a Hub3 in Modem mode and see the issues at various times of the day on both wired and wireless clients. All coax cable and connections look fine and I’ve done a full reset of the Hub3 to no avail.

The one thing I have noticed that the modulation on the upstream drops to 32/16QAM when the problem happens and based on that I started to monitor this as you can see in the graphs it fluctuates quite a bit. Power levels seem steady.

Any ideas as to what the issue might be? Hub3 and BMQ stats below.

Thanks,

James

 

Downstream bonded channels

Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	411000000	10	37	256 qam	1
2	419000000	9.6	37	256 qam	2
3	427000000	9.5	37	256 qam	3
4	435000000	10	37	256 qam	4
5	443000000	9.8	37	256 qam	5
6	451000000	10.3	37	256 qam	6
7	459000000	10.3	37	256 qam	7
8	467000000	10.5	37	256 qam	8
9	475000000	10.5	37	256 qam	9
10	483000000	10.9	37	256 qam	10
11	491000000	10.8	37	256 qam	11
12	499000000	10.6	37	256 qam	12
13	507000000	10.9	37	256 qam	13
14	515000000	10.8	37	256 qam	14
15	523000000	11.3	37	256 qam	15
16	531000000	11.4	37	256 qam	16
17	539000000	11.5	37	256 qam	17
18	547000000	10.9	37	256 qam	18
19	555000000	10.8	37	256 qam	19
20	563000000	10.5	37	256 qam	20
21	571000000	10.4	37	256 qam	21
22	579000000	10.9	37	256 qam	22
23	587000000	10.8	37	256 qam	23
24	595000000	11	37	256 qam	24

Downstream bonded channels

Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	36.6	97	8
2	Locked	37.3	132	17
3	Locked	37.3	133	15
4	Locked	37.6	66	15
5	Locked	37.3	74	14
6	Locked	37.3	80	0
7	Locked	37.6	100	14
8	Locked	37.3	86	0
9	Locked	37.6	113	15
10	Locked	37.3	51	0
11	Locked	37.3	70	0
12	Locked	37.6	87	0
13	Locked	37.3	57	16
14	Locked	37.6	76	0
15	Locked	37.6	65	0
16	Locked	37.6	56	12
17	Locked	37.6	44	0
18	Locked	37.3	96	0
19	Locked	37.6	63	0
20	Locked	37.3	60	0
21	Locked	37.3	105	0
22	Locked	37.3	50	0
23	Locked	37.6	54	0
24	Locked	37.3	46	0

Upstream bonded channels

Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	39400000	33.3	5120	32 qam	6
2	46200000	33.8	5120	32 qam	5
3	25800000	33.5	5120	16 qam	8
4	32600000	33.5	5120	16 qam	7

Upstream bonded channels

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

[jabster78]

Network Log

Time	Priority	Description
07/02/2021 22:53:2	Error	DHCP RENEW WARNING - Field invalid in response v4 option;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;
04/02/2021 13:18:37	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
04/02/2021 07:31:1	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
03/02/2021 10:01:43	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/02/2021 15:25:1	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/01/2021 19:47:21	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/01/2021 19:45:33	Warning!	LAN login FAILED : Incorrect Username / Password / ConnectionType;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/01/2021 10:36:58	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/01/2021 00:48:9	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
24/01/2021 06:55:33	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/01/2021 10:36:15	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/01/2021 12:36:18	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/01/2021 11:02:1	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/01/2021 01:18:18	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 19:32:45	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 13:18:18	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
14/01/2021 12:46:53	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/01/2021 01:18:17	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/01/2021 14:02:16	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;