Frequent Packet Drops/Loss - SYNC Timing Syncronisation Failure?
I had posted in the gaming support, but felt that a more detailed post here is likely to get a better response.
For a considerable length of time - probably at least 9 months, if not more - I have been suffering from frequent but irregular packetloss on my VM Fibre connection.
It was first noticed as on Microsoft Teams/Zoom calls when working from home my colleagues would report that I would occassionally freeze up, even though I could still see and hear them. As this was the only symptom (that I had noticed) I chalked it up to a connection with Teams/Zoom rather than an ISP issue. However over the last few months I have noticed when using online applications (in particular games) which require a constant connection that I get a frequent but irregular dropout causing packetburst/packetloss and the associated impact on gameplay and service that you would expect.
At the end of January I set up a BQM to check, and the frequent spikes are clearly shown. I have done all the standard troubleshooting steps - rebooting the Hub, checking the cables, resetting and so on. However a quick comparison of my Network Log to some historic cases on the forum seem to indicate that this is an issue with VM itself.
Downstream bonded channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1 | 387000000 | 1.5 | 40 | 256 qam | 32 |
2 | 139000000 | -2.2 | 38 | 256 qam | 1 |
3 | 147000000 | -2.4 | 38 | 256 qam | 2 |
4 | 155000000 | -2.4 | 38 | 256 qam | 3 |
5 | 163000000 | -2.5 | 38 | 256 qam | 4 |
6 | 171000000 | -2 | 38 | 256 qam | 5 |
7 | 179000000 | -1.7 | 38 | 256 qam | 6 |
8 | 187000000 | -1.2 | 38 | 256 qam | 7 |
9 | 195000000 | -1.4 | 40 | 256 qam | 8 |
10 | 203000000 | -1.5 | 40 | 256 qam | 9 |
11 | 211000000 | -1.4 | 40 | 256 qam | 10 |
12 | 219000000 | -1.4 | 38 | 256 qam | 11 |
13 | 227000000 | -1.5 | 38 | 256 qam | 12 |
14 | 235000000 | -1.4 | 40 | 256 qam | 13 |
15 | 291000000 | 0.5 | 40 | 256 qam | 20 |
16 | 299000000 | 1 | 40 | 256 qam | 21 |
17 | 307000000 | 1.4 | 40 | 256 qam | 22 |
18 | 315000000 | 1.5 | 40 | 256 qam | 23 |
19 | 323000000 | 1.7 | 40 | 256 qam | 24 |
20 | 347000000 | 1.9 | 40 | 256 qam | 27 |
21 | 355000000 | 1.7 | 40 | 256 qam | 28 |
22 | 363000000 | 1.4 | 40 | 256 qam | 29 |
23 | 371000000 | 1.2 | 40 | 256 qam | 30 |
24 | 379000000 | 1.5 | 40 | 256 qam | 31 |
Downstream bonded channels
Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1 | Locked | 40.3 | 19805 | 195715 |
2 | Locked | 38.6 | 108947 | 8023 |
3 | Locked | 38.6 | 52769 | 822193 |
4 | Locked | 38.6 | 49273 | 8436 |
5 | Locked | 38.9 | 44176 | 13074 |
6 | Locked | 38.9 | 70334 | 16532 |
7 | Locked | 38.6 | 24687 | 14993 |
8 | Locked | 38.6 | 15787 | 15846 |
9 | Locked | 40.3 | 10755 | 18079 |
10 | Locked | 40.3 | 18843 | 15205 |
11 | Locked | 40.3 | 6822 | 16780 |
12 | Locked | 38.9 | 7184 | 14446 |
13 | Locked | 38.6 | 10854 | 14582 |
14 | Locked | 40.3 | 12308 | 15733 |
15 | Locked | 40.9 | 19231 | 15266 |
16 | Locked | 40.3 | 5665 | 16485 |
17 | Locked | 40.3 | 4833 | 17544 |
18 | Locked | 40.3 | 5159 | 19561 |
19 | Locked | 40.9 | 6166 | 20477 |
20 | Locked | 40.3 | 4690 | 16440 |
21 | Locked | 40.9 | 4065 | 17475 |
22 | Locked | 40.9 | 4659 | 16458 |
23 | Locked | 40.3 | 4634 | 18992 |
24 | Locked | 40.3 | 2663 | 63053 |
Upstream bonded channels
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
1 | 30100000 | 40.3 | 5120 | 64 qam | 4 |
2 | 23600000 | 40.3 | 5120 | 64 qam | 5 |
3 | 36600000 | 40.8 | 5120 | 64 qam | 3 |
4 | 43100000 | 40.3 | 5120 | 64 qam | 2 |
5 | 49600000 | 40.8 | 5120 | 64 qam | 1 |
Upstream bonded channels
Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1 | ATDMA | 0 | 0 | 2 | 0 |
2 | ATDMA | 0 | 0 | 1 | 0 |
3 | ATDMA | 0 | 0 | 6 | 0 |
4 | ATDMA | 0 | 0 | 4 | 0 |
5 | ATDMA | 0 | 0 | 4 | 0 |