Hi,
It was very suprising to me when we observed that the particular vCenter Server is not able reach the particluar ESX host server (via ping or any king) but these servers are reachable from all the other windows and ESX servers.
We have performed all the required test on the both the servers:-
1. Logged into vCenter server and found nics are connected and up. 2. Tested the management network. Server is able to reach the Gateway, Both DNS servers and also it is able to resolve. 3. Checked hostd.log and vpxa.log and found that the sessions are getting created but it is failing to gather the quickstats metrics because of the packet drops. 4. Restarted the management services. But the issue is same But just for the testing purpose, we just migrated the vCenter server which is also VM from one host to an another host, suprising all started working fine without any issues. Also just for the checking purpose, we migrated back the VC back on the host where the actual issue and it continued to work without any issues. Not sure what has resolved the issue, but some inputs on this and wanted to build RCA for the same. Thanks Raghu