Network partitioned or network isolated errors

It may so happen that your vSphere host is randomly or permanently turning into red and you are getting one of the following messages in your alarm list: vSphere HA detected a network-partitioned host; Status = Red or vSphere HA detected that host crimv1esx001.linxsol.com is in a different network partition than the master Cluster-ML-FL in DataCenter017-Milan.

As suggested by VMware, this type of problem can be caused when your vCenter Server is able to communicate with the vSphere hosts by using heartbeat datastores but the communication between vCenter Server and vSphere hosts is disconnected on the management network. In this condition, a vSphere host is not considered as an isolated host.

While a vSphere host is considered to be in a network isolated state when it is unable to ping the configured isolation addresses and the vSphere HA agents on the other cluster hosts are unable to communicate with its vSphere host HA agent. VMware HA then...