There is how to use my C7000v2 modem/router as router only?

> [...] i have a C7200v2 modem/router, and i would like to use it as
> router on my dsl modem. [...]

   What is your "my dsl modem"?

> [...] There is any way?

   I doubt it.  Netgear Cxxxx models typically lack an Ethernet
WAN/Internet port.  Without that, how would you connect an external
modem?

   You should be able to use a C7200v2, not as a router, but as a
wireless access point, which might be useful if your (unspecified) "my
dsl modem" were actually a DSL modem+router.  For example:

      https://community.netgear.com/t5/x/x/m-p/1463500

   That's written for a C6300, but the steps are about the same for any
other router (any make/model) which lacks a one-step WAP option,
including yours.  But a wireless access point is not a router.