R8000 — Nighthawk X6 AC3200 Router Model / Version: R8000 won’t connect to modem

> I cannot get my router to connect to modem internet spectrum

   What, exactly, is your (unspecified) "modem"?  Maker?  Model number?
Any useful information at all?

   Does your (unspecified) "modem" connect to your ISP?

   "cannot" is not a useful problem description.  It does not say what
you did.  It does not say what happened when you did it.  As usual,
showing actual actions (commands) with their actual results (error
messages, LED indicators, ...) can be more helpful than vague
descriptions or interpretations.

> R8000 [...]

   Firmware version?

   Visit http://netgear.com/support , put in your model number, and look
for Documentation.  Get the User Manual (at least).  Read.  Beyond the
basic set-up instructions, look for the LED descriptions and
"Troubleshoot".  Indicators on your (unspecified) "modem" might be
interesting, too.