How is high availability of the NSX Edge Gateway accomplished?
A.
HA Application Monitoring on the Edge Gateway sends a heartbeat to the ESXi host.
B.
VMware Tools on the Edge Gateway sends a heartbeat to the ESXi host.
C.
The Edge appliance sends a heartbeat through an uplink interface.
D.
The Edge appliance sends a heartbeat through an internal interface.
Explanation:
https://www.zettagrid.com/faqs/nsx-charging/
D is correct: https://pubs.vmware.com/NSX-6/index.jsp?topic=%2Fcom.vmware.nsx.admin.doc%2FGUID-6C4F0C33-C6DD-432B-AA91-10AD6B449125.html