Netgear CM600 No Internet

[GarrettSR5]

I've had my CM600 for a few years now and over the past few months I would just randomly disconnect from my Xfinity service. Normally a simple reboot would solve the problem.
But tonight I think something has finally failed. I have power cycled the modem 3 times and it still says Cable Connection IN PROCESS when I login to 192.168.100.1

How do I nail down that it's the modem that failed or my connection from the street to the house ?

Thank you. I have uploaded a photo of the lights currently flashing on the modem

[plemans]

Do you have a screen snip of the cable connections page and the event logs from the modem?

[GarrettSR5]

Since I've made this thread it hasn't done it, until yesterday. 

Here's the log:

[quote]
Event Log
Clear Log Refresh

Time Priority Description
2021-07-30, 07:07:57 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:59 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:59 Critical (3) Ranging Request Retries exhausted;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:59 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:55 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:55 Critical (3) Ranging Request Retries exhausted;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:55 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:47 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:45 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:45 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:45 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:45 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:39 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:39 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:37 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:37 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:37 Critical (3) Ranging Request Retries exhausted;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:37 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:36 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:36 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:35 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:35 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:32 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:31 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:05:31 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:04:04 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:03:52 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:03:37 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:03:32 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:03:17 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:03:12 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:03:04 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:02:32 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:02:17 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:02:12 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:01:57 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
2021-07-30, 07:01:52 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.1;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=b0:39:56:04:d2:f0;CMTS-MAC=00:9e:1e:59:17:1f;CM-QOS=1.0;CM-VER=3.0;[/quote]

[plemans]

Your event log is indicating a line issue. But you don't have the cable connections page attached. that lets us look at signal strengths and suggest things to try. 

(next time get a screen snip . much easier to read)

[GarrettSR5]

[plemans]

Click on "choose file" and add them 1 as a time. When you insert a photo into the post, a moderator has to approve them and it can take a while

[GarrettSR5]

https://imgur.com/a/qMTul4t

[plemans]

You've got errors in your line, your power levels are all over,  and only 1 locked upstream. 

Check your coax line for kinks, spliters, amplifiers, or signal attenuators. Remove them if you have them. 

Check the line for old/bad/cheap/corroded/loose connections. Preferably, move the modem to right where the coax enters the home to prevent wiring in the home from being the issue. Then connect it and try it. if its still having issues, take the same screensnips and post them here. The isp might need to check the line in that case. 

[GarrettSR5]

There is a one to two splitter in my basement but only one exit is used. I'll order a straight connector.
The connection from the pole to the house is exposed, that seems like it would effect the signal.