Nighthawk ac1750 won’t connect to internet

[slanwar01]

Just installed arris T25 which works fine connected to my computer but netgear will not connect to the internet when plug the same cable that was connected to my computer, tired of unplugging the modem and still will not detect internet. This smart connection really sucks.

[plemans]

You're using the T25 as the modem? 

And you have the C6300 for a router? 

Or what actual router do you have? 

(hint, ac1750 is a speed)

[antinode]

> Just installed arris T25 [...]

   Ok.  That's a cable-TV modem.  "installed" _how_, exactly?

> [...] netgear will not connect to the internet when plug the same
> cable that was connected to my computer, [...]

   Huh?  What, exactly, are you connecting to what, exactly?  (Hint: If
a device has different types of Ethernet ports, then "connected to
device" is not enough detail.)

> [...] tired of unplugging the modem [...]

   Which one?  From what?

   What, exactly, are you trying to do with these devices?

> Model: C6300|AC1750 Cable Modem Router Docsis 3.0

   That's a cable-TV modem+router.  It can't be used as a router with
some external modem (because it lacks a WAN/Internet Ethernet port to
which to connect an external modem).