Beacon Interval

Set beacon interval value:

iwpriv ath0 bintval x

Replace x by the desired beacon interval in ms

Get beacon interval value:

iwpriv ath0 get_bintval

You'll get something like that:

ath0 get_bintval:100

That means the beacon interval value is 100ms. Beacon intervals close to the upper limit of 500 ms should be avoided when using wpa_supplicant. There appears to be a problem with repeated association and disassociation of the client with the AP.