What you're looking for is a netflow analyser. There are plenty of free tools you can use and I believe one is crudely integrated with observium. You're better off with a separate product though. Netflow is notoriously IO intensive and having it built into observium would be like dividing by zero. 

Sent from my HTC

----- Reply message -----
From: "Eliezer Sousa" <eliezer@ricas.com.br>
To: <observium@observium.org>
Subject: [Observium] Help top talkers
Date: Tue, Dec 16, 2014 1:34 AM

good afternoon! need to find out who the top Talkers on my network with observium, someone already did that?

Thank you for your help.

 

Eliezer de Sousa

 

ass eliezer