So basically we had a 100mb down/30up connection and we decided to upgrade it to a gigabit connection and we had to upgrade both our modem and router. We got the CM1100 and the nighthawk x6S r7900p. Since then I have been able to get consistent 700 down and 30up, but in a lot of games issues persist where it would feel like there is constant stuttering without any packet loss or high ping. I already talked to my ISP which is cox and they said there is no issues from their side which I would seem to agree with because there was no stuterring or lag before we switch modem and router.https://imgur.com/a/H1KGQ4V - Screenshot of the modem's event loghttps://imgur.com/a/Ssl4Bn2 - Screenshot of router's logAny help would be greatly appreciated.

Be sure your testing the CM1100 modem wiith out the router online. The CM1100 is well capable of near 900Mpbs speeds on the wire.Be sure to disable LAG on 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. 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#M12853

I did do all of those as soon as you posted. I called my ISP to re-provision my modem, and for them to check the signal to my house. The problem still persists. When I get these weird spikes, I go to cmd and do ping -n 100 www.google.com and most packets are under 20ms but some of them are over 300ms which is why i think I see these problems persist without having any higher ping than usual or packet loss, but I have no idea how to fix it.

Are you testing with a wired PC directly connected to the modem alone or thru the router? Has a factory reset been performed on the modem?

All those critical 3 events are ISP signal related. ISP needs to check the signal on the line.

Yes I did both of those things and this is the cmd test pinging to www.google.com and as you can see it fluctuates a lot sometimes there is a huge spike. https://imgur.com/a/HnPSfKd

Having a lot of issues with internet since switching to CM1100

17 Replies

FURRYe38
Guru - Experienced User
Jan 13, 2021
Be sure your testing the CM1100 modem wiith out the router online. The CM1100 is well capable of near 900Mpbs speeds on the wire.
Be sure to disable LAG on 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.
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#M12853
- Quick44
  Aspirant
  Jan 13, 2021
  I did do all of those as soon as you posted. I called my ISP to re-provision my modem, and for them to check the signal to my house. The problem still persists. When I get these weird spikes, I go to cmd and do ping -n 100 www.google.com and most packets are under 20ms but some of them are over 300ms which is why i think I see these problems persist without having any higher ping than usual or packet loss, but I have no idea how to fix it.
  - FURRYe38
    Guru - Experienced User
    Jan 13, 2021
    Are you testing with a wired PC directly connected to the modem alone or thru the router?
    Has a factory reset been performed on the modem?
FURRYe38
Guru - Experienced User
Jan 13, 2021
All those critical 3 events are ISP signal related. ISP needs to check the signal on the line.
- Quick44
  Aspirant
  Jan 13, 2021
  I will contact my ISP again a bit later in the night since there is a need for my wifi right now.

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Having a lot of issues with internet since switching to CM1100