VM to VM path will be traced if vRNI has:
- IP addresses on the VMs
- Default GW of the VMs
- DVPG or DVS of the VMs
- Routing Information from Edge/DLR/physical routers
- VLAN / VXLAN
To troubleshoot issues while running the feature, please review the error displayed in the UI and understand what information vRNI does not have to draw the path by running queries.
Once you have the missing information, reflect on why vRNI does not have it and think about how vRNI can get it.
The logs at
/home/ubuntu/logs/restapilayer/latest.log can give you some extra details on the failure.