net_stacks "ipv6_enabled" property does not work in vSphere Configuration Profiles

Products

• VMware vSphere ESX 8.x

Issue/Introduction

If the "net_stacks" "ipv6_enabled" property is set to false it would not be effective even after ESX hosts reboot.

esxcli cannot update the IPv6 Enabled after reboot.

Environment

ESXi 8.0 U3

Resolution

• Do not change the parameter or set net_stacks "ipv6_enabled" property to false in vSphere Configuration Profiles.
• Validate with the below command: 

[root@ESXi-Host1:~] esxcli network ip netstack get -N defaultTcpipStack
defaultTcpipStack
   Key: defaultTcpipStack
   Name: defaultTcpipStack
   Enabled: true
   Max Connections: 13000
   Current Max Connections: 11000
   Congestion Control Algorithm: newreno
   IPv6 Enabled: false  ---------->
   Current IPv6 Enabled: true
   ECN Status: enabled

• Follow the below step to switch the config to true:

[root@ESXi-Host1:~] esxcli network ip netstack set -N defaultTcpipStack -i true