USMA56795

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Internet disconnects for 10-15 seconds several times an hour.

I'm using an Arris SB8200. For the past week or so, the Internet cuts out for 10-15 seconds several times an hour. I've run a recurring ping and it shows it dropping on the first hop from my router. It's not a Wi-Fi issue--I'm on Ethernet--and it impacts multiple devices. I've power-cycled my cable modem, factory reset it, etc. but still have this issue.

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WiderMouthOpen

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Can you post your signal levels from 192.168.100.1? Also, do you see anything in the logs like T3/T4 time-out errors?

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USMA56795

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16 Messages

I can't login to my cable modem. I can factory reset it, but when I login with the default username and password it brings me to a "change password" page. When I change the password, it returns an error that says "Device failed to update password."

My guess--and it's just a guess--is that Cox flashes the firmware via the coax when I first plugged it in, and did so in a way that prevents subsequent password changes. But without that, there's no way for me to login to the admin console.

Edit: That's interesting. Having multiple numeric characters apparently doesn't work. I figured out a combination of characters and one numeric character that does. Let me look through the logs...

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WiderMouthOpen

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Don't post the logs without removing the modem MAC address from it.

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USMA56795

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16 Messages

Downstream QAM256 are between 8.1dBmV and 15.8dBmV with SNR/MER at 40.7 to 41.4 dB.
Upstream SC-QAM are at 36.0 dBmV.

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USMA56795

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Here are my logs:

03/04/2023 12:08 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:03 2436694061 5 "Dynamic Range Window violation"
03/04/2023 12:03 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:03 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:03 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:03 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:03 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:03 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:02 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:02 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:02 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:02 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:02 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:02 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:02 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:02 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 2436694061 5 "Dynamic Range Window violation"
03/04/2023 12:01 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 2436694061 5 "Dynamic Range Window violation"
03/04/2023 12:01 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 2436694061 5 "Dynamic Range Window violation"
03/04/2023 12:01 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 12:01 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 82000800 3 "16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 82000600 3 "Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:43 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:39 2436694061 5 "Dynamic Range Window violation"
03/04/2023 11:39 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:39 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:39 2436694061 5 "Dynamic Range Window violation"
03/04/2023 11:39 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:39 82000400 3 "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:38 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:38 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:38 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:38 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:38 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"
03/04/2023 11:35 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"

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USMA56795

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16 Messages

The forum software is flagging my response as "spam". I am seeing some errors:

03/04/2023 12:03 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=[redacted];CMTS-MAC=b0:8b:d0:6d:d3:21;CM-QOS=1.1;CM-VER=3.1;"

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Darkatt

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If your internet disconnects for 10-15 seconds, it sounds like WiFi interference. If the modem actually went offline, it would take much longer for it to re-sync. What router are you using, WiFi modem/Pano, or your own?

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