top talker or senders

Hi All, I' m new to supporting Fortigate FW, i have a 200A model. I' m facing an issue where by Internet BW is saturated and since i can' t trace from the provider' s router (which only has the FW IP anyway), can i find out who are the top IP talkers and senders? I' m using this command in CLI " diagnose stats per-ip-bw" but i' m not sure this is the right information. Many thanks for your assistance