Virgin Media Community

[nafwaz]

Hi All,

I've recently moved to a 1 gig line and decided to do a "Broadband Quality Monitor" on Think Broadband for the first time ever.

Does this look right? I've had a couple of dropouts this morning and it looks a bit more... spikey than expected.

[jbrennand]

Disconnects showing at ~10.00-11.00 (red bits at top of the yellow spikes) what does the log show at those times. What are your up/down power levels like ?

[nafwaz]

Hi John,

Thanks for the response. Unfortunately "Check Router Status" on SH4 doesn't seem to work properly, so this is a copy and paste from the up/downstream tabs in 'Advance Settings' -> 'Tools' -> 'Network Status':

3.0 Downstream channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
25 331000000 -1.200001 35.779911 QAM256 25
1 139000000 1.099998 35.779911 QAM256 1
2 147000000 0.799999 35.779911 QAM256 2
3 155000000 0.599998 35.779911 QAM256 3
4 163000000 0.200001 35.595078 QAM256 4
5 171000000 -0.200001 35.595078 QAM256 5
6 179000000 -0.099998 35.595078 QAM256 6
7 187000000 0.500000 35.779911 QAM256 7
8 195000000 0.500000 35.779911 QAM256 8
9 203000000 0.200001 35.779911 QAM256 9
10 211000000 0.000000 35.779911 QAM256 10
11 219000000 0.000000 35.779911 QAM256 11
12 227000000 -0.200001 36.386890 QAM256 12
13 235000000 -0.200001 35.779911 QAM256 13
14 243000000 -0.299999 35.779911 QAM256 14
15 251000000 -0.299999 35.595078 QAM256 15
16 259000000 -0.900002 35.779911 QAM256 16
17 267000000 -1.200001 35.779911 QAM256 17
18 275000000 -0.799999 35.595078 QAM256 18
19 283000000 -0.500000 35.779911 QAM256 19
20 291000000 -0.400002 35.779911 QAM256 20
21 299000000 -0.700001 35.779911 QAM256 21
22 307000000 -1.099998 35.779911 QAM256 22
23 315000000 -1.200001 35.779911 QAM256 23
24 323000000 -1.099998 35.779911 QAM256 24
26 339000000 -0.900002 35.779911 QAM256 26
27 347000000 -0.599998 36.609653 QAM256 27
28 355000000 -0.799999 36.386890 QAM256 28
29 363000000 -1.299999 35.595078 QAM256 29
30 371000000 -1.299999 35.779911 QAM256 30
31 379000000 -0.900002 35.779911 QAM256 31

3.0 Downstream channels
Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors
25 Locked 0 0 0
1 Locked 2380226376 0 0
2 Locked 313086012 0 0
3 Locked 313663545 0 0
4 Locked 313039112 0 0
5 Locked 313087469 0 0
6 Locked 313026116 0 0
7 Locked 313210865 0 0
8 Locked 136245409 0 0
9 Locked 136161922 0 0
10 Locked 90253421 0 0
11 Locked 137170387 0 0
12 Locked 134052106 0 0
13 Locked 134005699 0 0
14 Locked 134011675 0 0
15 Locked 134277837 0 0
16 Locked 146008121 0 0
17 Locked 146022305 0 0
18 Locked 145513553 0 0
19 Locked 146041708 0 0
20 Locked 127999269 0 0
21 Locked 146965695 0 0
22 Locked 147438820 0 0
23 Locked 144110182 0 0
24 Locked 226585545 0 0
26 Locked 227541807 0 0
27 Locked 227387652 0 0
28 Locked 227800743 0 0
29 Locked 227816260 0 0
30 Locked 227915565 0 0
31 Locked 2873523643 0 0

3.1 Downstream channels
Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159 80 4K 1560 QAM4096 392

3.1 Downstream channels
Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
159 Locked -1.4 9052858 75

3.0 Upstream channels
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
1 46200000 44.520599 5120 KSym/sec 64QAM 1
2 25800000 42.770599 5120 KSym/sec 64QAM 4
3 32600000 43.270599 5120 KSym/sec 64QAM 3
4 39400000 43.270599 5120 KSym/sec 64QAM 2

3.0 Upstream channels
Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1 US_TYPE_STDMA 0 0 0 0
2 US_TYPE_STDMA 0 0 0 0
3 US_TYPE_STDMA 0 0 0 0
4 US_TYPE_STDMA 0 0 0 0

[jbrennand]

Stats look ok to me - but I am not familiar with the Hub4 - someone who is should comment. Can you get the Network logs?

[nafwaz]

Thanks, John.

I sure can. I'm not sure how clean they are:

Network Log
Time Priority Description
Thu 01/01/1970 00:35:35 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:36:42 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:37:07 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:38:39 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:39:00 4 Missing Mandatory MDD TLV on primary DS Channel;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:39:23 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:40:31 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:40:54 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:42:29 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:42:53 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:43:57 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:44:21 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:45:27 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:45:48 4 Missing Mandatory MDD TLV on primary DS Channel;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:46:07 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:47:16 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:47:40 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:48:47 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:49:13 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:50:18 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:50:41 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:52:15 3 DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:52:41 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Mon 17/08/2020 08:53:51 5 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[jbrennand]

I am no expert but they are odd - again someone else should comment.

I think it would be worth trying a pinhole reset on the Hub to see if it clears it

[Tudor]

Looks to me that all those 01/01/1970 entries are because the hub is trying to contact the CMTS and failing so it has been unable to get the current date/time.