In reply to Filipe.

Thanks for the comments, Filipe and André. Without 11r the roam times could have been as high as a second if the client has to do a full reauth with a four-way handshake. More likely the clients would support something like PKC and the roam times would have been around 100-200 ms. Without 11k the clients would have had to spend more time off-channel scanning for an AP to roam to, resulting in degraded performance in the throughput test.

As for the speed of the train, it was walking pace, maybe about 2-3 miles an hour.