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Netgear CM1000v2 RCN/Astound Connection Drops
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Hello:
I have been having recent issues with constant connection dropouts and extreme lag with RCN/Astound with my Netgear CM1000v2 cable modem. Am seeing a lot of notices like this:
Dynamic Range Window violation | ||
2023-07-12, 23:40:25 | Warning (5) | RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=94:a6:7e:0d:c5:54;CMTS-MAC=00:af:1f:1e:b1:5a;CM-QOS=1.1;CM-VER=3.1; |
2023-07-12, 23:33:56 | Warning (5) | DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=94:a6:7e:0d:c5:54;CMTS-MAC=00:af:1f:1e:b1:5a;CM-QOS=1.1;CM-VER=3.1; |
2023-07-12, 23:33:56 | Notice (6) | DS profile assignment change. DS Chan ID: 32; Previous Profile: 1 3 4; New Profile: 1 2 3.;CM-MAC=94:a6:7e:0d:c5:54;CMTS-MAC=00:af:1f:1e:b1:5a;CM-QOS=1.1;CM-VER=3.1; |
RCN/Astound has reset the modem and they have apparently changed their policies on BYOM where they cannot do any type of troubleshooting.
Here is the cable connection data. I really don't know what to look for and they will charge me $75 to come look at it. Thank you.
Frequency start Value | |
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. | |
|
Procedure | Status | Comment |
Acquire Downstream Channel | 501000000 Hz | Locked |
Connectivity State | OK | Operational |
Boot State | OK | Operational |
Security | Enable | BPI+ |
IP Provisioning Mode | Honor MDD | IPv4 only |
<tabindex=-1>Downstream Bonded Channels</tabindex=-1>
Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR / MER | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
1 | Locked | QAM256 | 18 | 501000000 Hz | 3.7 dBmV | 34.2 dB | 288390124 | 21399 | 31867 |
2 | Locked | QAM256 | 1 | 519000000 Hz | 3.5 dBmV | 34.0 dB | 287424749 | 19017 | 28980 |
3 | Locked | QAM256 | 2 | 525000000 Hz | 3.5 dBmV | 33.9 dB | 287429991 | 19053 | 27703 |
4 | Locked | QAM256 | 3 | 531000000 Hz | 3.5 dBmV | 33.8 dB | 122903526 | 5753 | 14003 |
5 | Locked | QAM256 | 4 | 537000000 Hz | 3.4 dBmV | 33.7 dB | 287440795 | 16897 | 26223 |
6 | Locked | QAM256 | 5 | 543000000 Hz | 3.1 dBmV | 33.7 dB | 287435313 | 15757 | 25869 |
7 | Locked | QAM256 | 6 | 549000000 Hz | 2.8 dBmV | 33.6 dB | 287450049 | 15349 | 25312 |
8 | Locked | QAM256 | 7 | 555000000 Hz | 2.5 dBmV | 33.6 dB | 91466254 | 4102 | 9488 |
9 | Locked | QAM256 | 8 | 561000000 Hz | 2.5 dBmV | 32.9 dB | 287454146 | 16975 | 27032 |
10 | Locked | QAM256 | 9 | 567000000 Hz | 2.4 dBmV | 33.6 dB | 287459908 | 15989 | 26432 |
11 | Locked | QAM256 | 10 | 573000000 Hz | 2.5 dBmV | 33.6 dB | 287464515 | 16003 | 25587 |
12 | Locked | QAM256 | 11 | 579000000 Hz | 2.8 dBmV | 37.4 dB | 287469962 | 15257 | 24129 |
13 | Locked | QAM256 | 12 | 585000000 Hz | 4.0 dBmV | 38.6 dB | 287476512 | 14106 | 22621 |
14 | Locked | QAM256 | 13 | 591000000 Hz | 3.1 dBmV | 34.6 dB | 287482478 | 13150 | 21383 |
15 | Locked | QAM256 | 14 | 597000000 Hz | 3.1 dBmV | 34.5 dB | 287485829 | 12569 | 22207 |
16 | Locked | QAM256 | 15 | 603000000 Hz | 2.9 dBmV | 34.4 dB | 287487340 | 13698 | 23245 |
17 | Locked | QAM256 | 16 | 609000000 Hz | 2.6 dBmV | 34.3 dB | 287488835 | 14436 | 24788 |
18 | Locked | QAM256 | 17 | 495000000 Hz | 3.7 dBmV | 34.1 dB | 287477445 | 22255 | 32288 |
19 | Locked | QAM256 | 19 | 507000000 Hz | 3.6 dBmV | 34.0 dB | 287481954 | 20441 | 30530 |
20 | Locked | QAM256 | 20 | 513000000 Hz | 3.5 dBmV | 33.8 dB | 287495457 | 20090 | 29903 |
21 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
22 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
23 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
24 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
25 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
26 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
27 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
28 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
29 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
30 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
31 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
32 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV | 0.0 dB | 0 | 0 | 0 |
<tabindex=-1>Upstream Bonded Channels</tabindex=-1>
Channel | Lock Status | Modulation | Channel ID | Frequency | Power |
1 | Locked | ATDMA | 1 | 36800000 Hz | 44.0 dBmV |
2 | Locked | ATDMA | 2 | 30350000 Hz | 46.0 dBmV |
3 | Locked | ATDMA | 3 | 23900000 Hz | 43.5 dBmV |
4 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV |
5 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV |
6 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV |
7 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV |
8 | Not Locked | Unknown | 0 | 0 Hz | 0.0 dBmV |
Downstream OFDM Channels
Channel | Lock Status | Modulation / Profile ID | Channel ID | Frequency | Power | SNR / MER | Active Subcarrier Number Range | Unerrored Codewords | Correctable Codewords | Uncorrectable Codewords |
1 | Locked | 0, 1, 2, 3 | 159 | 682000000 Hz | 2.2 dBmV | 30.0 dB | 166 ~ 3929 | 314613111 | 72722389 | 4811 |
2 | Not Locked | 0 | 0 | 0 Hz | 1.5 dBmV | 0.0 dB | 0 ~ 4095 | 0 | 0 | 0 |
Upstream OFDMA Channels
Channel | Lock Status | Modulation / Profile ID | Channel ID | Frequency | Power |
1 | Not Locked | Unknown | 0 | 0 Hz | 0 dBmV |
2 | Not Locked | Unknown | 0 | 0 Hz | 0 dBmV |
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Glad you got it working. Please mark your thread as solved so others will know.
Enjoy. 📡
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Re: Netgear CM1000v2 RCN/Astound Connection Drops
What speeds do you pay for UP and Down from the ISP?
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected to the modem?
The modem has a ton of Correctables and Un-correctables that should be zeros.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/
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Re: Netgear CM1000v2 RCN/Astound Connection Drops
400 Mbps up and 25 Mbps down.
Finally got a hold of someone knowledgable at Astound/RCN (via Twitter). After checking they rebalanced the connection as they said the signal strength was too low. Everything seems back to normal. Twitter is still good for something.
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Glad you got it working. Please mark your thread as solved so others will know.
Enjoy. 📡
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