NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Orbi CBR40 Frequent Dropouts, T3/T4 errors
I have a netgear cable orbi that I've been running for almost a year now. Originally when I purchased it, I was having intermittent internet dropouts. My ISP (Spectrum) was able to resolve the issue by cleaning a connection on the pole. This was back in November.
Fast forward to the last 3-4 weeks we are back to having issues again. Issues started occurring after a car struck a power pole up the road from me, which knocked out internet and power. After regaining internet and power, the connection has been getting progressively more intermittent.
Now I am stuck in the finger pointing game, my ISP says its the router thats failed. Netgear says because the issue is intermittent, its an ISP issue.
Spectrum did note that there are dozens of T3/T4 errors in the logs and in that instance, they would normally replace the device.
Is it worth spending the $50 to get support from Netgear to try to better configure the router? Or do I keep fighting with my ISP to get the issues resolved.See below for an example of the log. Thanks!
Sep 30 2020 06:30:24 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out |
Sep 30 2020 06:30:53 | Critical (3) | No Ranging Response received - T3 time-out |
Sep 30 2020 06:32:15 | Warning (5) | B-INIT-RNG Failure - Retries exceeded |
Sep 30 2020 06:32:16 | Critical (3) | No Ranging Response received - T3 time-out |
Sep 30 2020 06:33:14 | Warning (5) | B-INIT-RNG Failure - Retries exceeded |
Sep 30 2020 06:33:16 | Critical (3) | No Ranging Response received - T3 time-out |
Sep 30 2020 06:34:52 | Warning (5) | B-INIT-RNG Failure - Retries exceeded |
Sep 30 2020 06:34:53 | Critical (3) | No Ranging Response received - T3 time-out |
Sep 30 2020 06:35:16 | Warning (5) | MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 |
Sep 30 2020 06:39:52 | Critical (3) | No Ranging Response received - T3 time-out |
Sep 30 2020 06:54:49 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out |
Sep 30 2020 06:55:23 | Critical (3) | No Ranging Response received - T3 time-out |
Sep 30 2020 06:56:11 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out |
Sep 30 2020 06:56:23 | Critical (3) | No Ranging Response received - T3 time-out |
Sep 30 2020 06:57:51 | Warning (5) | MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1 |
|
|
|
4 Replies
Have the ISP check the signal and line quality UP to the modem. Errors are cause by bad signal on the line or the ISP service line is not correctly being maintained.
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.
Be sure to power OFF the modem for 1 minute them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853Thank you for the info. I did have the ISP do that this past Tuesday 9/28. However as per the tech, there is nothing they can do unless they catch the issue happening live. He tested all the connection points with no faults found. Cable is all ISP installed from box on house to the router
any support from NTGR or setting will not help you for this.
This looks like purely RF line issue from the ISP.
when you errors such as "B-INIT-RNG Failure - Retries exceeded" that means one of the usptream channels is completely disconnected or has a noise in it.
you can try replacing cables/different outers/remove splitters before ISP arrives but most likely this will be ISP issue.
