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Connection dropouts every ~15 mins.
Since early October my connection has been dropping out intermittently. Specifically, for at least a month, every 10-20 minutes my bandwidth drops down to anywhere from 0 to 1000Kbps and remains there for up to a minute before returning to normal. My bandwidth is normally ~400 down/12 up.
It happens on all my devices on both ethernet and wifi, and I have no issues when using tethered cell data instead of my xfinity connection.
It seems to be my upload speed that consistently drops to close to zero, but I also have occasional issues with download speed too. I'm regularly experiencing issues with video calls, online games, and streaming due to this.
I've had two tech visits in the past couple of weeks. The first visit, the tech said there was a clear signal issue and that a network specialist would be called out to fix it. After the maintenance was completed, the issue still remained and the tech came back out. He checked the line both inside and out and confirmed that the original maintenance had been finished. He then replaced my modem/router. Unfortunately, none of this solved the problem. He acknowledged the issue was still present but said it would be hard to fix and couldn't provide a specific reason for it.
I'm at a loss now. I've never had an issue like this before and I'll be forced to switch to another provider if it can't be resolved.
I figured I'd post the usual info here just incase, but seen as a tech looked at this just a few days ago, I'm not sure there's anything that'll stand out. Regardless, I appreciate any help or advice on what to do.
What the dropouts look like:
Router/modem : CGM4331COM (new as of 3 days ago)
The only logs that show up other than logins/initial password change are these from firewall section:
FW.IPv6 INPUT drop , 8 Attempts, 2020/11/27 22:00:39 | Firewall Blocked | |
FW.IPv6 INPUT drop , 497 Attempts, 2020/12/20 06:07:17 | Firewall Blocked | |
FW.IPv6 FORWARD drop , 498 Attempts, 2020/12/20 04:58:01 | Firewall Blocked | |
FW.WANATTACK DROP , 135 Attempts, 2020/12/20 02:58:01 | Firewall Blocked | |
FW.IPv6 INPUT drop , 2240 Attempts, 2020/12/19 16:58:01 | Firewall Blocked | |
FW.IPv6 FORWARD drop , 1092 Attempts, 2020/12/19 16:58:01 | Firewall Blocked | |
FW.WANATTACK DROP , 140 Attempts, 2020/12/19 06:58:01 | Firewall Blocked | |
FW.IPv6 INPUT drop , 1245 Attempts, 2020/12/18 16:58:01 | Firewall Blocked | |
FW.IPv6 FORWARD drop , 1122 Attempts, 2020/12/18 16:58:01 | Firewall Blocked | |
FW.IPv6 INPUT drop , 804 Attempts, 2020/12/17 16:58:01 | Firewall Blocked | |
FW.IPv6 FORWARD drop , 1495 Attempts, 2020/12/17 16:58:01 | Firewall Blocked |
Signal info
Downstream | Channel Bonding Value | |||||||||||||||||||||||||||||||
32 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 33 | 34 | 48 | |
Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked |
675 MHz | 507 MHz | 513 MHz | 519 MHz | 525 MHz | 531 MHz | 537 MHz | 543 MHz | 549 MHz | 555 MHz | 561 MHz | 567 MHz | 573 MHz | 579 MHz | 585 MHz | 591 MHz | 597 MHz | 603 MHz | 609 MHz | 615 MHz | 621 MHz | 627 MHz | 633 MHz | 639 MHz | 645 MHz | 651 MHz | 657 MHz | 663 MHz | 669 MHz | 681 MHz | 687 MHz | 805 MHz | 716600000 |
38.1 dB | 38.6 dB | 38.5 dB | 38.5 dB | 38.4 dB | 38.6 dB | 38.7 dB | 38.6 dB | 38.6 dB | 38.6 dB | 38.6 dB | 38.6 dB | 38.5 dB | 38.4 dB | 38.2 dB | 38.0 dB | 37.8 dB | 38.1 dB | 38.2 dB | 38.1 dB | 38.3 dB | 38.3 dB | 38.3 dB | 38.3 dB | 38.2 dB | 38.3 dB | 38.4 dB | 38.4 dB | 38.3 dB | 38.2 dB | 38.1 dB | 37.6 dB | NA |
5.9 dBmV | 4.2 dBmV | 4.2 dBmV | 4.5 dBmV | 4.1 dBmV | 4.5 dBmV | 4.8 dBmV | 5.0 dBmV | 5.0 dBmV | 4.9 dBmV | 5.3 dBmV | 4.9 dBmV | 4.5 dBmV | 4.3 dBmV | 3.4 dBmV | 2.2 dBmV | 1.2 dBmV | 2.5 dBmV | 3.5 dBmV | 3.8 dBmV | 4.3 dBmV | 4.7 dBmV | 5.4 dBmV | 5.4 dBmV | 5.4 dBmV | 5.9 dBmV | 6.3 dBmV | 6.3 dBmV | 6.0 dBmV | 5.9 dBmV | 5.7 dBmV | 7.2 dBmV | NA |
256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | 256 QAM | OFDM | OFDM |
Upstream | Channel Bonding Value | ||
1 | 2 | 3 | 4 |
Locked | Locked | Locked | Locked |
36 MHz | 30 MHz | 23 MHz | 17 MHz |
5120 | 5120 | 5120 | 5120 |
38.3 dBmV | 38.5 dBmV | 38.5 dBmV | 38.5 dBmV |
QAM | QAM | QAM | QAM |
ATDMA | ATDMA | ATDMA | ATDMA |
CM Error Codewords | |||||||||||||||||||||||||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 |
30312687 | 270027666 | 270035518 | 270042789 | 270050587 | 270057918 | 270065022 | 270072350 | 270080800 | 270088385 | 270096791 | 270104089 | 270111063 | 270118813 | 270126250 | 270132705 | 270140273 | 270147352 | 270154977 | 270161837 | 270168199 | 270176366 | 270183595 | 270190647 | 270198013 | 270205040 | 270211771 | 270218354 | 270226978 | 270232841 | 270235485 | 30312687 |
28992414 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 28992414 |
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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