Virgin Media Community

[adammarshall]

After upgrading my internet package from 100Mbps to 350Mbps yesterday (16/01/2021) I'm encountering slow and inconsistent speeds. Sometimes I can get 250Mbps download and 36Mbps upload, to 80Mbps download and 4Mbps upload an hour later.

I have a wired connection and I've restarted my router a couple of times in an attempt to resolve the issue.

[Andruser]

Possibly a pre-existing noise issue that you barely noticed is now preventing the higher speeds being delivered consistently.  Connect to the hub by clicking on this link http://192.168.0.1/  That should pull up the log in page for the hub.  But don't log in, just click on the link "Check router status"  That'll bring up a window with five tabs.  Open the Downstream tab.  Select all the text (Ctrl-A if using a keyboard), copy it (Ctrl-C), then paste it (Ctrl-V) into a reply here.  Post that, do the same for the Upstream and Network log.  You'll get an error message when you post the Network log, just click on "post" a second time.  Don't post screenshots.

Then we can check the power, noise and error stats to see if there's anything in them that would explain this.

[adammarshall]

Downstream bonded channels

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

1	227000000	5.1	40	256 qam	12
2	219000000	4.8	40	256 qam	11
3	235000000	5	40	256 qam	13
4	243000000	4.3	40	256 qam	14
5	251000000	4.8	40	256 qam	15
6	259000000	4.4	40	256 qam	16
7	267000000	4.1	40	256 qam	17
8	275000000	4.5	40	256 qam	18
9	283000000	4.5	40	256 qam	19
10	291000000	4.5	40	256 qam	20
11	299000000	4.6	40	256 qam	21
12	307000000	4.8	40	256 qam	22
13	315000000	5	40	256 qam	23
14	323000000	4.5	40	256 qam	24
15	331000000	5	40	256 qam	25
16	371000000	4.5	40	256 qam	26
17	379000000	4.6	40	256 qam	27
18	387000000	5	40	256 qam	28
19	395000000	4.5	40	256 qam	29
20	403000000	4.3	40	256 qam	30
21	411000000	4.6	40	256 qam	31
22	419000000	4.5	40	256 qam	32
23	427000000	4	40	256 qam	33
24	435000000	3.7	40	256 qam	34

Downstream bonded channels

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

1	Locked	40.3	26	0
2	Locked	40.9	19	0
3	Locked	40.3	15	0
4	Locked	40.9	11	0
5	Locked	40.9	8	0
6	Locked	40.3	9	0
7	Locked	40.3	9	0
8	Locked	40.3	7	0
9	Locked	40.3	6	0
10	Locked	40.9	8	0
11	Locked	40.3	23	0
12	Locked	40.3	11	0
13	Locked	40.9	27	0
14	Locked	40.3	6	0
15	Locked	40.3	292	0
16	Locked	40.3	339	0
17	Locked	40.3	140	0
18	Locked	40.3	132	0
19	Locked	40.3	166	0
20	Locked	40.3	145	0
21	Locked	40.3	333	0
22	Locked	40.3	266	0
23	Locked	40.3	118	0
24	Locked	40.3	248	0

Upstream bonded channels

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

1	39400000	42.5	5120	64 qam	2
2	25799971	42.8	5120	64 qam	4
3	32600000	42.8	5120	64 qam	3
4	46200000	43.3	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	1	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0

[adammarshall]

Network Log

Time Priority Description

18/01/2021 07:13:1	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/01/2021 22:04:24	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 19:19:28	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 13:39:2	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 13:35:2	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 13:32:18	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 13:32:14	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 13:32:14	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 13:32:14	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
16/01/2021 13:32:13	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 12:59:24	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 12:18:40	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 12:18:36	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 12:18:36	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 12:18:36	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
15/01/2021 12:18:36	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
14/01/2021 09:16:20	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
14/01/2021 08:53:45	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 03:25:21	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/01/2021 01:26:8	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[Andruser]

There's nothing obviously wrong in those stats (power is good, SNR is good, error count is acceptable, modulation is fine), although the network log indicaates an unreliable connection.

Setup a BQM, that'll show what's going on with your VM connection.  Post a link to a live, shared graph here and we'll see what's happening.  Usually needs to run for 24 hours before we can draw reasonable conclusions, but the live graph will continuously update so you can do that immediately.

[adammarshall]

https://www.thinkbroadband.com/broadband/monitoring/quality/share/d7de8de8359aeb0d0f2e23e71d819d8157767e19

[adammarshall]

Ok the broadband tracker has been running for over 24 hours now. Any conclusions you can draw?