On Jan 26, 2020, at 12:00 PM, make-wifi-fast-request@lists.bufferbloat.net wrote:

An ongoing issue is that I'm not sure what I'm supposed to be seeing
when sniffing OFDMA DL and UL traffic. The DL OFDMA and UL OFDMA
sequences described in David Coleman's Aerohive blog posts, which are
also in the CWNA 5th Edition Study Guide that David co-authored, have
yet to be seen.
https://blog.aerohive.com/dl-ofdma/
https://blog.aerohive.com/uplink-orthogonal-division-multiple-access-ul-ofdma-in-802-11ax/