Want to see per-interface (L2) utilization - Netflow

Hi everyone. I'm a big fan of Netlow and using it in NTA, and so are my bosses. We're trying to confirm to some critics that the network at L2 is not being hammered. Can we use any Solarwinds tools, or otherwise, to show each interface's (or port-channel's) utilization?

I'm hoping for graphing and presentation similar to what is seen in NTA for the L3 interfaces. Any guidance would be greatly appreciated.