CM1000v2 is connected to Optimum cable and Orbi 04 mesh. I am getting increasing frequency where internet drops completely even though the modem shows signal. If I hit the restart on the modem it quickly has full signal (I have 200G service but get about 220 on Wi-Fi regularly)I tried to see if the modem is actually outputting direct signal by plugging my computer directly to modem ethernet BUT I get NO internet signal to the computer. I checked the connection by hooking the same cable to an ethernet port on the Router and I get connection fine. This is also disturbing since I could not log into the modem directly (I can through the router) Will a reset on either or both help?

The Firmware is V1.01.03The log and status pages are quite a bit - Here is a screen shot for one of the pages. Not sure which is most useful. Right now we have too much ZOOMING going on in the house for me to do some of these restarts. I did find an older router I can hook up if I get a crash again to see if I can still get signal through the modem. (an older Netgear, not a mesh)I can try what has been suggested for doing a better restart for both modem and router and will do those when I can work when everybody is free from internet

Here is the events pageI am curious about what constitutes high signal level. There is one splitter on the cable when it comes into the house since one line use to go to a TV which I do not use. So the modem gets the main line coming in (after that one splitter that the ISP did install)Nothing else attached to the line other than a connector box to extend the line.

So I changed the splitter to a two split and a different cable Now the errors are only on 3 channels and the levels are significantly lower than originally. I think I will leave it like this for now (unless those channels 25,27 and 28 would be important).

What Firmware version is currently loaded?Please post a copy and paste of the modems connection status and event log page.https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-routerhttps://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended. What is the brand and model of the host wifi router connected to the modem? Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.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-Modems/m-p/1530376#M12853https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-routerhttps://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

NeilU wrote:CM1000v2 is connected to Optimum cable and Orbi 04 mesh. I am getting increasing frequency where internet drops completely even though the modem shows signal. If I hit the restart on the modem it quickly has full signal (I have 200G service but get about 220 on Wi-Fi regularly)I tried to see if the modem is actually outputting direct signal by plugging my computer directly to modem ethernet BUT I get NO internet signal to the computer. I checked the connection by hooking the same cable to an ethernet port on the Router and I get connection fine. This is also disturbing since I could not log into the modem directly (I can through the router) Will a reset on either or both help? You are trying to make things happen too quickly. To connect your computer directly to the modem, start by powering down your modem (pull the cord) and power down your computer. Wait a few minutes and disconnect the Ethernet cord before you power up your modem. Give your modem ample time to go through the boot process and connect with your ISP. One of the last indicators you will see illuminate is for your phone connections. Now connect the Ethernet cable to your computer and boot the operating system. It can take several minutes (I have seen up to 20) for your ISP to release the previously assigned router IP address and assign a new one to your computer. When you are done, you may have to repeat the sequence when you put your router back in the network.

CM1000V2 modem cannot connect computer

39 Replies

FURRYe38
Guru - Experienced User
Feb 28, 2023
What Firmware version is currently loaded?
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router

Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected to the modem?

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
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-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
Kitsap
Master
Feb 28, 2023
NeilU wrote:
CM1000v2 is connected to Optimum cable and Orbi 04 mesh.
I am getting increasing frequency where internet drops completely even though the modem shows signal. If I hit the restart on the modem it quickly has full signal (I have 200G service but get about 220 on Wi-Fi regularly)
I tried to see if the modem is actually outputting direct signal by plugging my computer directly to modem ethernet BUT I get NO internet signal to the computer. I checked the connection by hooking the same cable to an ethernet port on the Router and I get connection fine.
This is also disturbing since I could not log into the modem directly (I can through the router)

Will a reset on either or both help?
You are trying to make things happen too quickly. To connect your computer directly to the modem, start by powering down your modem (pull the cord) and power down your computer. Wait a few minutes and disconnect the Ethernet cord before you power up your modem. Give your modem ample time to go through the boot process and connect with your ISP. One of the last indicators you will see illuminate is for your phone connections. Now connect the Ethernet cable to your computer and boot the operating system. It can take several minutes (I have seen up to 20) for your ISP to release the previously assigned router IP address and assign a new one to your computer.

When you are done, you may have to repeat the sequence when you put your router back in the network.
- NeilU
  Guide
  Feb 28, 2023
  Ouch
  What I was hoping was I could segregate the issue of whether the internet signal was actually getting through the modem. That would explain why I could not just bypass the connection to the router to see if I am getting real thru-put into the router.
  
  The modem usually would to show internet signal was strong when it has gone down which again is a question of whether it is the modem or the router. Unfortunately I haven't tried restarting just the router in the past - I keep restarting the modem and that causes the router to also to go through a reboot. And since the only time I get to check this out is when I get a crash I can't just check things out at will.
  Would resetting either or both devices help in the future?
  - FURRYe38
    Guru - Experienced User
    Feb 28, 2023
    Has a power off for 1 minute then back ON with the ISP modem and router been performed since last update?
    Be sure to restart your network in this sequence:
    Turn off and unplug modem.
    Turn off router and computers.
    Plug in and turn on modem. Wait 2 minutes for it to connect.
    Turn on the router and wait 2 minutes for it to connect.
    Turn on computers and rest of network.
    
    Please give feedback to the questions presented as well...

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CM1000V2 modem cannot connect computer