Hi Thanks for your help.
I am able to resolve the FQDN of hosts from vCenter as we have edited the hostfile of vCenter. But we cant ping the fqdn of vcenter from ESXi hosts....
We have other environments where only vcenter can ping ESXi FQDN but HA works perfect.
Secondly due to any restriction if the gateway is not reachable the different host isolation address should work? but in our case its behaving same even after specifying the different host isolation.
