esx.problem.vsan.net.not.ready
Summary
vmknic {1} that is currently configured to be used with VSAN doesn't have an IP address yet. There are no other active network configuration and therefore the VSAN node doesn't have network connectivity.
Causes
The VMkernel adapter that is used for Virtual SAN is not configured correctly (possibly, the VMkernel adapter does not have a proper IP address assigned).
Resolutions
Refer to this VMware KB article for troubleshooting steps.
External
Refer to the VMware Online Documentation for more information on vCenter event messages and possible solutions.