on 08-01-2022 14:42
My M600 broadband has been working fine for months is now dropping below 100Mbps. HUB3 is in modem mode and it takes a reboot for it to go back to normal speeds but that lasts a very short while before it's back to less than 100 again.
Router has been rebooted and speed tests have been done from a wired PC and done multiple speed test sites - all report the same.
I'll post the modem logs and BQM graph below this message but any help with this would be appreciated.
Thanks
on 08-01-2022 14:44
Cable Modem StatusItem Status Comments
Acquired Downstream Channel (Hz) | 290750000 | Locked |
Ranged Upstream Channel (Hz) | 25800000 | Locked |
Provisioning State | Online |
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1 | 290750000 | 7 | 40 | 256 qam | 20 |
2 | 138750000 | 5.5 | 38 | 256 qam | 1 |
3 | 146750000 | 5.4 | 40 | 256 qam | 2 |
4 | 154750000 | 5.4 | 40 | 256 qam | 3 |
5 | 162750000 | 5.3 | 40 | 256 qam | 4 |
6 | 170750000 | 5.5 | 40 | 256 qam | 5 |
7 | 178750000 | 5.5 | 40 | 256 qam | 6 |
8 | 186750000 | 5.5 | 40 | 256 qam | 7 |
9 | 194750000 | 5.4 | 40 | 256 qam | 8 |
10 | 202750000 | 5.3 | 40 | 256 qam | 9 |
11 | 210750000 | 5 | 40 | 256 qam | 10 |
12 | 218750000 | 5 | 40 | 256 qam | 11 |
13 | 226750000 | 4.5 | 38 | 256 qam | 12 |
14 | 234750000 | 3.9 | 40 | 256 qam | 13 |
15 | 242750000 | 3.7 | 40 | 256 qam | 14 |
16 | 250750000 | 3.4 | 38 | 256 qam | 15 |
17 | 258750000 | 4.9 | 38 | 256 qam | 16 |
18 | 266750000 | 6 | 40 | 256 qam | 17 |
19 | 274750000 | 6.4 | 40 | 256 qam | 18 |
20 | 282750000 | 7 | 40 | 256 qam | 19 |
21 | 298750000 | 7.1 | 40 | 256 qam | 21 |
22 | 306750000 | 7.5 | 40 | 256 qam | 22 |
23 | 314750000 | 7.5 | 40 | 256 qam | 23 |
24 | 322750000 | 7.5 | 40 | 256 qam | 24 |
Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1 | Locked | 40.9 | 647 | 3 |
2 | Locked | 38.9 | 1586624 | 267 |
3 | Locked | 40.3 | 1029784 | 308 |
4 | Locked | 40.3 | 665077 | 315 |
5 | Locked | 40.3 | 87077 | 257 |
6 | Locked | 40.3 | 13895 | 180 |
7 | Locked | 40.3 | 2659 | 139 |
8 | Locked | 40.3 | 936 | 131 |
9 | Locked | 40.9 | 553 | 125 |
10 | Locked | 40.3 | 514 | 134 |
11 | Locked | 40.3 | 501 | 116 |
12 | Locked | 40.9 | 617 | 108 |
13 | Locked | 38.9 | 653 | 106 |
14 | Locked | 40.9 | 719 | 81 |
15 | Locked | 40.3 | 743 | 51 |
16 | Locked | 38.9 | 817 | 39 |
17 | Locked | 38.9 | 716 | 31 |
18 | Locked | 40.9 | 660 | 12 |
19 | Locked | 40.3 | 671 | 19 |
20 | Locked | 40.9 | 614 | 5 |
21 | Locked | 40.9 | 636 | 0 |
22 | Locked | 40.9 | 603 | 13 |
23 | Locked | 40.3 | 622 | 0 |
24 | Locked | 40.3 | 630 | 0 |
on 08-01-2022 14:45
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
1 | 25800000 | 44 | 5120 | 64 qam | 4 |
2 | 32600024 | 44 | 5120 | 64 qam | 3 |
3 | 39400004 | 44 | 5120 | 64 qam | 2 |
4 | 46199983 | 45.5 | 5120 | 64 qam | 1 |
Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1 | ATDMA | 0 | 0 | 28 | 0 |
2 | ATDMA | 0 | 0 | 2 | 0 |
3 | ATDMA | 0 | 0 | 2 | 0 |
4 | ATDMA | 0 | 0 | 4 | 0 |
Time Priority Description
08/01/2022 07:51:41 | critical | No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
07/01/2022 07:09:7 | notice | DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt078+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
07/01/2022 07:09:7 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
04/01/2022 03:37:18 | critical | No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
03/01/2022 19:09:6 | notice | DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt078+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
03/01/2022 19:09:6 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
01/01/2022 04:29:47 | critical | No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
31/12/2021 07:09:5 | notice | DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt078+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
31/12/2021 07:09:5 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
30/12/2021 14:03:48 | critical | No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
28/12/2021 04:15:27 | notice | DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt078+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
on 08-01-2022 14:48
on 10-01-2022 15:22
Hi @stpuk.
Sorry to hear you're experiencing issues. I have located your account and check the levels and everything is in spec. I have also checked the area and there is nothing affecting you. If you have the HUB in router mode with the ethernet connected are you getting the same speed? Is the device you are using 1gbps compatible? What ethernet cable are you using? Does the speed drop when using a different port?
on 11-01-2022 17:26
Hi @Carley_S
As mentioned in my initial post, this has been working absolutely fine until very recently.
A reboot of my router made no difference but as before, rebooting the HUB restored the speed back to what it should be as you can see in the speed test history below. This of course will reduce over the next 24-48 hours as it has done previously, so I suspect there is in fact something amiss on your side or there is a fault with the modem.
I've not been able to check the HUB in router mode yet but in answer to your other questions, everything is 1Gbps compatible and Cat6 cables are being used.
on 13-01-2022 17:53
Good Afternoon @stpuk, can you please advise me how the service has been performing since your latest post?
Have you possibly been able to run a speed test with the hub in modem mode and using one of your Cat 6 Ethernet cables?
Kindest regards,
David_Bn
on 14-01-2022 10:42
Hi David
As usual it worked fine for a short while and then has reverted back to below 100Mbps. I won't be able to check it in router mode until the weekend unfortunately
on 16-01-2022 10:54
Thanks for the update @stpuk, do please let us know when you've been able to give router mode a try for us
Kindest regards,
David_Bn