Copy/pasting from another NX-OS/CML thread: I checked with the sandbox team, and NX-OS is not supported on the DevNet CML sandbox due to resources it requires.
However, they express that if there is interest in having NX-OS on the CML sandbox, please share use cases/requirements so they can review and reconsider. If you are working with a Cisco Partner or Cisco Account Team, it also helps if you can ask them to let us know so we know the demand.
