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Julia37's avatar
Julia37
Aspirant
Mar 19, 2021

CM1200 and Xfinity connection issues

I have new Modem for about a month. I registered modem with Xfinity successfully. I use a Google Wifi Router.  I inconsistently have connection issues. DownStream is tyically blinking.  Firmware is...
FURRYe38's avatar
FURRYe38
Guru - Experienced User
Mar 19, 2021

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

  • Julia37's avatar
    Julia37
    Aspirant
    Mar 21, 2021

    Xfinity tech came out and replaced ALL coax to my apartment. he did spot some shielding damage in some spots. 

    However, still blinking downstream light. 

    We did a hard reset on modem and hardwired directly to laptop. Still blinking downstream light. Here is recent Event log 

    • FURRYe38's avatar
      FURRYe38
      Guru - Experienced User
      Mar 21, 2021

      Were all the Downstream channels locked in? I see 31 is locked in. 

      What speed do you pay for UP and DOWN? 

       

      Your only getting 1 channel on the UP BONDED locked in, there should be 4 I believe

      Is LAG enabled on the modem? Link Aggregation

       

      The ISP should look into this with you. Have them review the signal up to the modem and the event and cable connection logs.