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Downstream Flashes

sfgh46
Aspirant
Aspirant
‎2023-04-27 05:15 PM
‎2023-04-27 05:15 PM

Downstream Flashes

Downstream starts flashing every couple of weeks.  Only have 1/5 internet speed, then eventually no internet when this happens.  Reboot used to work, not anymore.  Attached are modem logs.   Let me know if more information is needed.  Thanks.

 

 
 
 
 
TimePriorityDescription
Thu Apr 27 09:23:48 2023Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:22:45 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 13; New Profile: 9 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:18:53 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:18:24 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:18:12 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:17:51 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:17:42 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:17:36 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 10 13; New Profile: 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:17:23 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:17:23 2023Notice (6)CM-STATUS message sent. Event Type Code: 22; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:16:57 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:16:51 2023Notice (6)CM-STATUS message sent. Event Type Code: 20; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:16:25 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 9 13; New Profile: 10 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:16:21 2023Notice (6)CM-STATUS message sent. Event Type Code: 22; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:16:21 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:16:20 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:16:12 2023Notice (6)CM-STATUS message sent. Event Type Code: 20; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:16:01 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:15:51 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:12:28 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 12 13; New Profile: 9 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:10:51 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:10:28 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:10:28 2023Notice (6)CM-STATUS message sent. Event Type Code: 22; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:10:06 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:09:47 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:09:39 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:09:27 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 2.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:09:19 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:08:55 2023Notice (6)CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:08:35 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 09:08:24 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 08:21:59 2023Notice (6)CM-STATUS message sent. Event Type Code: 24; Chan ID: 159 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 08:21:51 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 08:21:30 2023Notice (6)CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 08:05:13 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 08:00:10 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 07:24:13 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 10 13; New Profile: 11 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 07:19:05 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 9 13; New Profile: 10 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 06:53:29 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 10 13; New Profile: 9 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
Thu Apr 27 06:48:14 2023Notice (6)US profile assignment change. US Chan ID: 8; Previous Profile: 9 13; New Profile: 10 13.;CM-MAC=80:cc:9c:6f:1d:e0;CMTS-MAC=c8:84:a1:19:2a:46;CM-QOS=1.1;CM-VER=3.1;
 
 

 

Message 1 of 8
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plemans
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Guru
‎2023-04-28 05:13 AM
‎2023-04-28 05:13 AM

Re: Downstream Flashes

Your logs indicate line issues. 

Do you have a screensnip of the cable connections page? 

 

Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
If you can, simply connect the modem right where the coax comes into the home. This prevents wiring in the home from being the issue. And some ISP’s charge if the wiring issue is in the home. So this helps prevent this.

Message 2 of 8
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sfgh46
Aspirant
Aspirant
‎2023-04-29 12:07 AM
‎2023-04-29 12:07 AM

Re: Downstream Flashes

Thanks for the help!  Just one new rg6 coax connected directly to isp coax, then run through wall connected directly to modem.     Here is other info you asked for?

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sfgh46
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Aspirant
‎2023-04-29 12:08 AM
‎2023-04-29 12:08 AM

Re: Downstream Flashes

 
Message 4 of 8
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sfgh46
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Aspirant
‎2023-04-29 12:08 AM
‎2023-04-29 12:08 AM

Re: Downstream Flashes

 
Message 5 of 8
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FURRYe38
Guru Guru
Guru
‎2023-04-29 10:34 AM
‎2023-04-29 10:34 AM

Re: Downstream Flashes

Power levels are all over the place and some channels are too high:

https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router

All channels should be with in 3db of each other. 

 

You have lots of correctables and un-correctables that should be mostly zero.

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. 
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

Message 6 of 8
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sfgh46
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Aspirant
‎2023-04-29 12:29 PM
‎2023-04-29 12:29 PM

Re: Downstream Flashes

Here is the chain up to modem--->   ISP coax coming out of ground is connected directly to rg6 coax, which is run through wall and connected directly to modem (no connector plates.).         

 

1. Can the modem be the problem?  

 

2. Can length of coax be the problem?

 

Thanks again for any help!

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FURRYe38
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Guru
‎2023-04-30 08:06 AM
‎2023-04-30 08:06 AM

Re: Downstream Flashes

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly. Have them review the logs you posted here and the info included here in this thread. 

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