You can check via show arp command on NSX edge CLI. Based on the traffic flow during the redeployment phase, ARP enteries will show stale/reachable and HA interface ARP cache will be permanent in Active-Standby deployment.
Note: Redeploying edge will cause a slight disruption in the traffic flow.
Thanks for your reply Sreec; I know how to show arp entrys - but how to set them statically?
I don't think this is possible. What is your use case and need for this?
As per me, It is not possible to add static arp entry on NSX edge. I wasn't able to find any link for such in official documentation. But you can add a static entry on DLR using net-vdr command.
net-vdr --nbr -a -i destIp -m destMac -n lifName vdrName
*Extracted from command help
Let me know if it helps your use case.