Nighthawk R6450 model

[DanDblue]

This model is not listed on Netgear.com website. I need to make this router compatible with my Spectrum modem😡

[antinode]

> This model is not listed on Netgear.com website. [...]

   So it seems.

> [...] I need to make this router compatible with my Spectrum modem

   Define "compatible".  Has your (unspecified) "my Spectrum modem" a
maker and model number?  Is there some actual problem which you are
trying to solve?