on 09-09-2021 18:50
We run a Super Hub 2 in modem mode with an ASUS AC86U router and have been using this setup for many years without any issues.
For a long time now, our 200/20 service has been performing perfectly, until yesterday. My partner said she noticed things that are usually quick to do were slow and I noticed slow performance today across different services and devices.
We usually get at least 200 Mbps down in speed tests on any device on wired and 5 GHz wireless connections, but since my partner noticed things being slow yesterday, then me testing things today, our upload speed is running at its usual full speed of 20 Mbps, but our download is consistently 6 Mbps or less on wired and 5 GHz wireless.
There have been no changes to our home network environment or configuration and the VM Service Status says no known issues with broadband in our area. Our 200/20 service was working at full speed up to 7 Sep.
Our upstream and downstream stats are within spec and there's not much in the log.
on 09-09-2021 18:51
Network Log
First Time | Last Time | Priority | Error Number | Description |
09/09/2021 15:55:13 GMT | 09/09/2021 15:55:13 GMT | Warning (5) | 66050310 | Auth Success - Web login successful. |
09/09/2021 12:21:49 GMT | 09/09/2021 12:21:49 GMT | Error (4) | 68010300 | DHCP RENEW WARNING - Field invalid in response v4 option |
08/09/2021 08:14:21 GMT | 08/09/2021 08:14:21 GMT | Warning (5) | 84020200 | Lost MDD Timeout |
08/09/2021 08:14:16 GMT | 08/09/2021 08:14:16 GMT | Critical (3) | 84000500 | SYNC Timing Synchronization failure - Loss of Sync |
06/09/2021 00:21:43 GMT | 06/09/2021 00:21:43 GMT | Error (4) | 68010300 | DHCP RENEW WARNING - Field invalid in response v4 option |
02/09/2021 12:21:38 GMT | 02/09/2021 12:21:38 GMT | Error (4) | 68010300 | DHCP RENEW WARNING - Field invalid in response v4 option |
30/08/2021 00:21:34 GMT | 30/08/2021 00:21:34 GMT | Error (4) | 68010300 | DHCP RENEW WARNING - Field invalid in response v4 option |
29/08/2021 23:51:33 GMT | 29/08/2021 23:51:33 GMT | Error (4) | 68000407 | TOD established |
29/08/2021 23:51:04 GMT | 29/08/2021 23:51:04 GMT | Critical (3) | 82000200 | No Ranging Response received - T3 time-out |
29/08/2021 23:51:01 GMT | 29/08/2021 23:51:01 GMT | Critical (3) | 82000200 | No Ranging Response received - T3 time-out |
29/08/2021 23:51:00 GMT | 29/08/2021 23:51:00 GMT | Critical (3) | 82000200 | No Ranging Response received - T3 time-out |
29/08/2021 23:50:55 GMT | 29/08/2021 23:50:55 GMT | Notice (6) | 84000510 | Downstream Locked Successfully |
29/08/2021 23:50:44 GMT | 29/08/2021 23:50:44 GMT | Critical (3) | 82000200 | No Ranging Response received - T3 time-out |
29/08/2021 23:50:42 GMT | 29/08/2021 23:50:42 GMT | Critical (3) | 82000200 | No Ranging Response received - T3 time-out |
29/08/2021 23:50:37 GMT | 29/08/2021 23:50:37 GMT | Notice (6) | 84000510 | Downstream Locked Successfully |
29/08/2021 23:50:33 GMT | 29/08/2021 23:50:33 GMT | Critical (3) | 82000600 | Unicast Maintenance Ranging attempted - No response - Retries exhausted |
29/08/2021 23:50:33 GMT | 29/08/2021 23:50:33 GMT | Critical (3) | 82000300 | Ranging Request Retries exhausted |
29/08/2021 23:50:32 GMT | 29/08/2021 23:50:32 GMT | Critical (3) | 82000200 | No Ranging Response received - T3 time-out |
29/08/2021 23:50:31 GMT | 29/08/2021 23:50:31 GMT | Critical (3) | 82000200 | No Ranging Response received - T3 time-out |
29/08/2021 23:50:29 GMT | 29/08/2021 23:50:29 GMT | Critical (3) | 82000200 | No Ranging Response received - T3 time-out |
on 09-09-2021 20:48
on 09-09-2021 21:09
It's an odd one. Our setup and service has been stable for years now, then this all of a sudden.
For the first time in at least eight years, I've put the hub back into router mode and am now seeing a slightly lower upload speed, but download is near max again. Downstream and Upstream levels appear to be unaffected by this mode change. The plot thickens.
Downstream DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) | 411000000 | 419000000 | 427000000 | 435000000 | 443000000 | 451000000 | 459000000 | 467000000 |
Lock Status(QAM Lock/FEC Sync/MPEG Lock) | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked |
Channel ID | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Modulation | 256QAM | 256QAM | 256QAM | 256QAM | 256QAM | 256QAM | 256QAM | 256QAM |
Symbol Rate (Msym/sec) | 6.952000 | 6.952000 | 6.952000 | 6.952000 | 6.952000 | 6.952000 | 6.952000 | 6.952000 |
Interleave Depth | I=12 J=17 | I=12 J=17 | I=12 J=17 | I=12 J=17 | I=12 J=17 | I=12 J=17 | I=12 J=17 | I=12 J=17 |
Power Level (dBmV) | 4.52 | 4.50 | 4.18 | 3.73 | 3.57 | 3.49 | 3.38 | 3.53 |
RxMER (dB) | 38.26 | 38.61 | 37.94 | 38.26 | 38.26 | 38.26 | 38.26 | 38.26 |
Pre RS Errors | 347 | 331 | 941 | 304 | 306 | 327 | 294 | 865 |
Post RS Errors | 297 | 302 | 936 | 298 | 304 | 323 | 292 | 861 |
on 09-09-2021 21:10
Upstream US-1 US-2 US-3 US-4
Channel Type | 2.0 | 2.0 | 2.0 | 2.0 |
Channel ID | 1 | 2 | 4 | 3 |
Frequency (Hz) | 60300000 | 53700000 | 39400000 | 46200000 |
Ranging Status | Success | Success | Success | Success |
Modulation | 64QAM | 64QAM | 64QAM | 64QAM |
Symbol Rate (Sym/sec) | 5120000 | 5120000 | 5120000 | 5120000 |
Mini-Slot Size | 2 | 2 | 2 | 2 |
Power Level (dBmV) | 51.00 | 50.50 | 49.25 | 50.00 |
T1 Timeouts | 0 | 0 | 0 | 0 |
T2 Timeouts | 0 | 0 | 0 | 0 |
T3 Timeouts | 1 | 0 | 0 | 0 |
T4 Timeouts | 0 | 0 | 0 | 0 |
on 09-09-2021 21:37
on 09-09-2021 23:00
09-09-2021 23:08 - edited 09-09-2021 23:10
The Hubs can run at -6 --> 10 dBmV (D/S)
and 33-->51 (U/S)
ANd if you aren't having any issues then all is good - but as there are issues VM would usually want to put the hubs somewhere in the middle of the operating range.
Power can fluctuate and an instantaneous reading of 51 dBmV can actually be 49 --53.
If it is a 53 then the the hub has a good chance of dropping connection (which you don't want)
Hope this helps. (It's how the tech who came to my house explained it to me!)
I, rightly or wrongly, think of it like a car - you can run it at 6,500 rpm - it is within spec - but you wouldn't necessarily want to
09-09-2021 23:33 - edited 09-09-2021 23:36
Some years after we had broadband installed, we had an engineer visit when we changed from the Samsung HD box to TiVo and he fitted a Forward Path Attenuator 3 dB as part of this. I don't recall us having any broadband or TV issues at the time before this was added to the setup. So the coax cable from the inside wall socket has the attenuator on it and this connects to a box, then this box has three other coax cables going to/from it: one to the Super Hub, one to the V6 box and one to a mains power adapter.
It was so long ago, I can't remember why he suggested we have one fitted to our setup, so I don't know at this point if it's helping our broadband and TV performance or is unnecessary. I've never unplugged its mains adapter to see that would happen.
on 10-09-2021 13:18
Quick update. Since going from modem mode to router and back to modem on the Super Hub 2 last night, my download speed has returned to full speed through the AC86U. I don't know if this action resolved it, or just coincidence. Also for good measure, I factory reset and reconfigured my AC86U after doing this. I thought I might as well, since playing around with the hub.