2 Messages
Dynamic Range Window Violation causing multiple connection drops daily
Hi all,
I have the issue of T3 and T4 timeouts as a result of Dynamic Range Window Violation. I have tried two different modems -- a CM-1000 and SB8200 and both have same issue. Techs have come to my house 3 times now and have replaced the line from the tap to the box in the back of my house and also the line from that box to the wall outlet, all to no effect. I had seen this thread which makes me wonder if it is an issue on the Xfinity side:
Are there any cable modems that use DOCSIS 3.1 that are known to NOT have this issue? I'll happily buy one at this point, ha. Any help is greatly appreciated.
Below are my logs with the MAC address edited out to be all 0's:
| 22/3/2024 09:00:50 |
3 | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:00:51 |
3 | No Ranging Response received - T3 time-out;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:00:54 |
3 | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:00:54 |
3 | No Ranging Response received - T3 time-out;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:00:54 |
3 | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:01:00 |
3 | CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz. |
| 22/3/2024 09:01:00 |
3 | CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz. |
| 22/3/2024 09:01:00 |
3 | CMSTATUS:US_Diplexer_Mode_Change:TLV-21.1, 5-42MHz. |
| 22/3/2024 09:01:05 |
3 | No Ranging Response received - T3 time-out;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:01:08 |
6 | Honoring MDD; IP provisioning mode = IPv6 |
| 22/3/2024 09:01:16 |
3 | CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz. |
| 22/3/2024 09:01:16 |
3 | CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz. |
| 22/3/2024 09:01:16 |
3 | CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz. |
| 22/3/2024 09:01:17 |
6 | TLV-11 - unrecognized OID;CM-MAC=8c:76:3f:fd:59:01;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:01:18 |
6 | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:03:33 |
6 | CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:03:46 |
3 | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:04:00 |
5 | RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:04:00 |
5 | Dynamic Range Window violation |
| 22/3/2024 09:04:01 |
5 | RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=00:00:00:00:00:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| 22/3/2024 09:04:01 |
5 | Dynamic Range Window violation |
BruceW
Gold Problem Solver
•
26.4K Messages
1 year ago
"Commanded Power Exceeds" and "Dynamic Range Window" error log entries are almost never the fault of the modem, they indicate problems with the connection between the modem and Comcast's network.
Network connection problems are often due to poor coax connections or damaged coax cable, usually in or near your home. Running the cable through a surge protector, a defective splitter, or too many splitters can cause signal problems as well. If there is an amplifier in the line make sure it's getting power.
If you want to troubleshoot this yourself, please see Internet Troubleshooting Tips. If you still need help, please post your Internet plan speed and the following information from your modem or gateway (from http://192.168.100.1 or http://10.0.0.1):
Copy and pasted text is preferred over images. Be aware that, if you post any images, your message will be made Private for a time, as all images must be approved by the Forum Moderators before the messages containing them become generally visible.
If you can't find the problem you'll have to have Comcast take another shot at fixing the problem. If an employee does not respond to your message here, lean on them! Keep pressing until they identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit (approx $100) unless you have their Service Protection Plan ( https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device or anything outside your home you shouldn't be charged.
Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.
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