Manage the BSS

Manage the flow of data

Communicate configuration changes between WLAN controller and APs

Prioritize network administration traffic

Every time a STA associates to an AP to which it has previously been associated

Only when a STA is using FT roaming

Only when a STA roams back to an AP it has previously been associated with

Every time a STA roams

Look for gaps in the sequence number in MAC header

Protocol Analyzers show the number of missing packets in their statistics view

Retransmission are an indication of missing packets

The missing packets will be shown as CRC errored packets