smcj wrote:Atiyoga is tantric Dzogchen. It is tantra.
Non-tantric Dzogchen is slightly different. Non-tantric Mahamudra is sutra Mahamudra. So as I've said, if the parallel systems are consistent, then non-tantric Dzogchen is sutra Dzogchen. Or maybe not, but that's how the Sarma traditions are classified.
ChNN has some unusual perspectives. He is an authentic teacher and what he says is valid. But what he says isn't always mainstream. I personally can't think of anyone else with quite his take on things. That's ok. What he is teaching is legitimate. But try to name someone that has the same perspective that isn't a student of his, and you'll have to look hard.
The classification of Sutra (renunciation), Tantra (transformation), and Dzogchen (spontaneous auto-liberation) is just the same within Bon.
I have read and heard the same classification from Yongdzin Tenzin Namdak and other Yungdrung Bon masters.