Network Traffic Graphs

Hello

We are yet to see any network traffic via the One interface. All other metrics display graphs perfectly however the network bandwidth has never displayed. After a period of time a blue line appears which denotes zero traffic.

We are using the latest Opennebula community version and via vSphere hosts via VDS.

Is there some type of specific setup used on each VDS port or switch to enable vsphere to send traffic metrics to Opennebuala ?