The folloing may the the answer
BSSID 00:21:xx:xx is the access point MAC address followed by interface
-0 means deauthentification
1 means the number of deauths to send(one can send multiple)
-1 type of attach to use
and many more
if you wish to use wire shark and capture handshake packets there are 2 ways
watch screen for "WPA hand shakes 00:21:xx:xx in the top right hand corner
This means a 4 way hand shake was successfully captured...
use wire shark and apply filter of "eapol"
this only displays "eapol" packets you are interested in
keep me posted on progress
regards
gunter