Excellent, Im hoping for the same result thanks for posting a reply. 

I read on another thread in reddit, v16.12.4 was successful hoping to test this in the New year. 

Ive read several reports downgrading to 16.2.x has solved issues for some, I will test and report back later in a few weeks

I am recently experiencing the exact same issue on ver 17.3.3, C9200-48P,  100 Mbs devices originally worked until recently, with no change iOS change or running config change?Device reloaded, cables tested, other devices 1Gbs work fine on the same p...