I recently logged into my vRNI UI and received the following error:

• “vRealize Network Insight Proxy VM is not working properly”
•  “Some of the Data Sources are not working properly. Please check their status on the Settings Page”

To troubleshoot the errors I made use of the commands listed below. This is by no mean the full extend of the commands available but they helped me in my connectivity troubleshooting.  I will provide a link at the bottom to the CLI guide.

• SSH into the vRNI platform and proxy VM
  • username – Consoleuser
  • password -ark1nc0ns0l3
  • Run command
    • (cli) modify-password consoleuser (ONLY available in version 3.2)
      • PLEASE change this default password to enhance security.
    • (cli) show-service-status
      • Found the following error, but the status change after I had connectivity between the platform and proxy VM!
        • 
    • (cli) show-connectivity-status
      • Verify connectivity status with all systems
    • (cli) show-config
      • Verify network configuration is OVA parameters
    • (cli) log-trace list files OR (cli) log-trace list applications
      • Shows available log files.
    • (cli) log-trace follow filename
      • Just like tail -f this show latest entries in the log file.
    • (cli) ping proxy&platformserver-fqdn
    • (cli) nslookup proxy&platformserver-fqdn
    • (cli) ping gateway

Links:

https://www.vmware.com/pdf/vrni/vrealize-network-insight-32-cli-guide.pdf