Cach khắc phục issue: ESXi 5.0 hosts are marked as Not Responding 60 seconds after being added to vCenter Server (2020100)
ESXi 5.0 hosts are marked as Not Responding 60 seconds after being added to vCenter Server (2020100) Symptoms When an ESXi 5.0 host is added to vCenter Server 5.0, the host is added correctly but approximately 60 seconds later it is marked as Not Responding . Disabling the ESXi 5.0 firewall allows the host to connect. When ESXi 3.x and 4.x hosts are added, they do not exhibit the same behavior. Cause The ESXi host sends UDP heartbeats to the vCenter Server, and by default this traffic is sent over port 902. There is also a rule in the ESXi firewall to allow for vCenter Server heartbeat traffic. If the vCenter Server has been configured to send traffic over an alternate port, that traffic will be blocked. Resolution There are two methods to resolve this issue: Method 1: Add a firewall rule to the ESXi host to allow traffic on the alternate heartbeat port Method 2: Configure vCenter Server to use the default port number 902 Note : Befor...