NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.

Forum Discussion

Gistole's avatar
Gistole
Follower
Jun 27, 2019

CM1100 with Comcast Xfinity

I have recently sign up for the Xfinity 400Mbps service and I also bought the CM1100 with firmware V2.01.02. I performed my test with the laptop connected to the modem directly via cat6 cable. The maximum speed I can get is 90Mbps. I called Xfinity and they came with their cable modem Xfi and their modem is able to achieve speed up to 400Mbps being via cat6 cable or the build in wifi signal (Same laptop). Speedtest.net is the testing website. The technician advised me to rent their Xfi modem instead of using the Netgear CM1100 in order to achieve the 400Mbps speed. Is there anyone from Netgear who can advise me on how I can get the 400Mbps speed? Or should I return the Netgear and try the Motorola SB8600? Thanks!

1 Reply

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User

    My CM1100 max's out at 900Mbs when I had that service plan for several months last year. It supports up to this speed. The tech should have tested the CM1100 on there system. Did he? Was the modem fully powered OFF for 1 minute then back on then tested again with Ooklas speedtest installable app? Try a different PC to compare. 

     

    Possible the unit maybe faulty, however I doubt it. 


    Gistole wrote:

    I have recently sign up for the Xfinity 400Mbps service and I also bought the CM1100 with firmware V2.01.02. I performed my test with the laptop connected to the modem directly via cat6 cable. The maximum speed I can get is 90Mbps. I called Xfinity and they came with their cable modem Xfi and their modem is able to achieve speed up to 400Mbps being via cat6 cable or the build in wifi signal (Same laptop). Speedtest.net is the testing website. The technician advised me to rent their Xfi modem instead of using the Netgear CM1100 in order to achieve the 400Mbps speed. Is there anyone from Netgear who can advise me on how I can get the 400Mbps speed? Or should I return the Netgear and try the Motorola SB8600? Thanks!