Hi, Usually, the same interface you're using for management is used for sending accounting packets, just like SNMP management. On Cisco IOS this is configurable with the "ip radius source-interface" command. When unspecified, the gateway interface's IP address is being used instead. Regarding "Which application is responsible for generating those pakets?" - you'd have to consult the manual for that particular AP.
Good luck, Omri. - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
