VDS & Network Monitoring

Hello

We are using vSphere 6.7 with Opennebula 5.12.3 and Virtual Distrubuted Switch.
There seems to be an issue with obtaining network stats via the the dashboard as the network transmission as well as all other network graphs display zero traffic. See screenshot.

Wed Dec 2 10:38:38 2020 [Z0][HMM][I]: Successfully monitored VM: 12
Wed Dec 2 10:39:09 2020 [Z0][HMM][I]: Successfully monitored VM: 12
Wed Dec 2 10:39:19 2020 [Z0][HMM][I]: Successfully monitored host: 0
Wed Dec 2 10:39:49 2020 [Z0][HMM][I]: Successfully monitored VM: 12
Wed Dec 2 10:39:59 2020 [Z0][HMM][I]: --Mark–
Wed Dec 2 10:40:29 2020 [Z0][HMM][I]: Successfully monitored VM: 12

In addition, what are the correct security settings for a vDS as the documentation is limited.

Any advice would be appreciated.

Thank you.