In my infra ESXi host frequently disconnects from vCenter. There could be number of reasons when host disconnects from vCenter, which is very well documented in VMware KB articles
One of the possible cause of this is Firewall settings at vCenter might be blocking heartbeat packets. To check this, i have followed these steps:-
1. vSphere Web Client > Home Page > System Configuration > Nodes > Manage tab > Firewall
But i couldn't find any entry here
2. SSH > vCenter Server Appliance
Shell
iptables -L --line-numbers | more
To delete the iptable rule entry:-
iptables -D <Chain> <rulenumber>
Bingo!!!!! Issue resolved.
One of the possible cause of this is Firewall settings at vCenter might be blocking heartbeat packets. To check this, i have followed these steps:-
1. vSphere Web Client > Home Page > System Configuration > Nodes > Manage tab > Firewall
But i couldn't find any entry here
2. SSH > vCenter Server Appliance
Shell
iptables -L --line-numbers | more
iptables -D <Chain> <rulenumber>
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