Normally our ISP and Internet service works very well and we get speeds up 115MBPS. Today everything was going great, then suddenly we lose connectivity.
The wireless router is fine. I log into Cable Modem and I see the following errors:

2020-12-16, 09:24:07 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=38:94:ed:75:3e:40;CMTS-MAC=00:01:5c:69:22:6c;CM-QOS=1.1;CM-VER=3.0;

2020-12-16, 09:23:58 Error (4) Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=38:94:ed:75:3e:40;CMTS-MAC=00:01:5c:69:22:6c;CM-QOS=1.1;CM-VER=3.0;

2020-12-16, 09:23:58 Error (4) Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=38:94:ed:75:3e:40;CMTS-MAC=00:01:5c:69:22:6c;CM-QOS=1.1;CM-VER=3.0;

2020-12-16, 09:23:29 Notice (6) Overriding MDD IP initialization parameters; IP provisioning mode = IPv6

2020-12-16, 09:23:18 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:3e:40;CMTS-MAC=00:01:5c:69:22:6c;CM-QOS=1.1;CM-VER=3.0;

2020-12-16, 09:22:46 Critical (3) Started Unicast Maintenance Ranging -- No Response received - T3 time-out;CM-MAC=38:94:ed:75:3e:40;CMTS-MAC=00:01:5c:69:22:6c;CM-QOS=1.1;CM-VER=3.0;

Previously (8 months ago) I had the ISPs hardware (modem) but since then I bought my own equipment (Netgear CM600).

I'm wondering

  1. what those errors might indicate? -- if anything
  2. if the ISP was sending some kind of maintenance signal thinking it was their modem (even though they know I have my own equipment) and that is causing some error?
  • 1
    Actually Missing BP Configuration Setting TLV refers to the issue. It means not able to sync network parameters with ISP. I would suggest that you check if you have the updated firmware kb.netgear.com/000036375/… Firmware upgrades are pushed down by your ISP. After checking with them you may need to update it or change timeout settings that typically lead sync to fail. In worst case it can be coax issue.
    – Hardoman
    Dec 16, 2020 at 16:57
  • Speak to your ISP
    – DavidPostill
    Dec 16, 2020 at 18:06
  • @Hardoman First, thanks for comment with ideas about what might be happening. I appreciate it. It feels odd to me that even though I keep the firmware updates on my modem the ISP will push firmware updates to my device? That really seems odd. Especially to do it in the middle of the day. Not questioning that you're right just doesn't seem like the right process from ISP. But whoever said they do things right? :) edit - Ok, I just read that link (very helpful) wow, that is very interesting to me that ISP handles the router that I own. All good. thanks
    – raddevus
    Dec 16, 2020 at 20:07
  • @Hardoman Also, I just checked my modem's firmware version and it is correct for my ISP (Spectrum) V1.01.14. Thanks again, you really helped.
    – raddevus
    Dec 16, 2020 at 20:11
  • 1
    Just got popular question award for 1,000 views. Zero upvotes. Always cracks me up. 😆
    – raddevus
    Apr 24, 2021 at 21:04

1 Answer 1


Here’s what happened. When the tech arrived he went directly to the outside drop. He reached inside saw there was a filter (small extension between end connector and incoming coax connection).
He unscrewed the filter threw it on the ground and plugged the coax directly into the connection.

The company switched the frequencies they were broadcasting internet signal on and when they did anyone with this old TV filter on their lines was down.

We waited 48 hours for a 30 second fix. 😓


I noticed the filter the tech removed is still out there so I took a pic.

filter on coax

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.