IPv6 configuration lost on VSAN kernel

Products

• VMware vSphere ESXi

Issue/Introduction

• The VSAN kernel is configured with ipv6 using auto configuration.
• You may see the following on the hostd.log

YYYY-MM-DDTHH:MM:SS.005Z info hostd[2104332] [Originator@6876 sub=Vimsvc.ha-eventmgr] Event 186 : vmknic vmk2 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.
YYYY-MM-DDTHH:MM:SS.005Z info hostd[2105011] [Originator@6876 sub=Hostsvc.VmkVprobSource] VmkVprobSource::Post event: (vim.event.EventEx) {
-->    key = 130,
-->    chainId = 0,
-->    createdTime = "1970-01-01T00:00:00Z",
-->    userName = "",
-->    host = (vim.event.HostEventArgument) {
-->       name = "#########",
-->       host = 'vim.HostSystem:ha-host'
-->    },
-->    eventTypeId = "esx.problem.vsan.net.not.ready",
-->    arguments = (vmodl.KeyAnyValue) [
-->       (vmodl.KeyAnyValue) {
-->          key = "1",
-->          value = "vmk2"
-->       }
-->    ],
-->    objectId = "ha-host",
-->    objectType = "vim.HostSystem",
--> }
YYYY-MM-DDTHH:MM:SS.005Z info hostd[2105011] [Originator@6876 sub=Vimsvc.ha-eventmgr] Event 187 : vmknic vmk2 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.

• The external physical switch was changed recently
• Once the host was powered on, VSAN communication using VSAN kernel was lost. 

Environment

vSphere 8.0

Cause

The router advertise packets were not received by the ESXi host and VSAN kernel was using ipv6 with auto configuration set to Yes

 

Resolution

Assign static global IPv6 IP address

Additional Information

Add and Configure an IPv6 VMkernel Network Interface with ESXCLI