In WLC, User A moving from one AP to another AP ?

[palani2010]

In WLC, user is moving traffic from One AP to another AP. 

Probe request/probe response ?

Authentication request/response will switch between APs ?

Association request will be switch between APs.

[Kasun Bandara]

@palani2010 hi, check below doc for high level understanding of roaming.

https://study-ccnp.com/wireless-intracontroller-wifi-roaming-explained/

[srimal99]

@palani2010  You can refer to following link as well, roaming explained in packet level.
https://mrncciew.com/2014/09/02/cwsp-802-11-roaming-basics/