How can I see real-time network traffic from a device interface?

How can I see real-time network traffic from a device interface?

Hey there,
 
I remember that OpManager trial version had a feature to see an interface traffic in real-time, by clicking on an icon, the as real-time CPU Usage and Memory Usage.
 
Now, I bought deluxe version and I just can't find this feature. I just can monitor CPU and Memory usage in real-time, but no Network Interface usage.
 
Can anyone help me? My version is one of the highest version, with cluster support, etc, and I can't believe it doesn't has real-time monitor for network card.
 
Thanks in advance.
Gabriel

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