In the documentation Cisco Nexus 9000 Series NX-OS Programmability Guide, Release 9.3(x) there is a chapter dedicated to Inband Network Telemetry. The documentation is a bit confusing because the title is "Nexus 9000", but a requirement for this functionality is a license (N3K-STR1K9) that is available only for switches of other 3000 serie (!).
Is there anyone who has tried this feature? Apparently it is not present in 9k switches.