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senthilp's avatar
senthilp
Follower
Apr 16, 2020
Solved

Modem-CM1100- Not able to connect laptop with modem

i have cable modem cm1100. it works well with google wifi router. but if i use other port to connect my laptop with modem, it does not work.

 

 

can anyone please tell me why? and how to fix this issue?

 

  • > [...] if i use other port to connect my laptop with modem, it does not
    > work.

     

       That's right.  Visit http://netgear.com/support , put in your model
    number, and look for Documentation.  Get the User Manual.  Read.  Look
    for "LAN 1 and 2 ports".

     

    > can anyone please tell me why? [...]

     

       The CM1100 is a modem, not a modm+router.  With typical residential
    service from your ISP, which allows you one external IP address,
    connecting multiple client devices requires the use of a (NAT) router,
    not only a modem.

     

    [...] and how to fix this issue?

     

       Connect a router to the CM1100, and connect your client devices to
    that router.

2 Replies

  • > [...] if i use other port to connect my laptop with modem, it does not
    > work.

     

       That's right.  Visit http://netgear.com/support , put in your model
    number, and look for Documentation.  Get the User Manual.  Read.  Look
    for "LAN 1 and 2 ports".

     

    > can anyone please tell me why? [...]

     

       The CM1100 is a modem, not a modm+router.  With typical residential
    service from your ISP, which allows you one external IP address,
    connecting multiple client devices requires the use of a (NAT) router,
    not only a modem.

     

    [...] and how to fix this issue?

     

       Connect a router to the CM1100, and connect your client devices to
    that router.

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User

    Who is your ISP? 

    Is LAG enabled on the CM modem? 


    senthilp wrote:

    i have cable modem cm1100. it works well with google wifi router. but if i use other port to connect my laptop with modem, it does not work.

     

     

    can anyone please tell me why? and how to fix this issue?