Enable IPv6 management access with persistent configuration

Hi F5 Team,

I'm trying to configure a BIG-IP VE (version>=14.0) template on vSphere to clone into new ADCs dynamically with Ansible or Terraform.

Before create a template I must enable IPv4/IPv6 or full-IPv6 on the network adapters of the VE, precisely for management in the first place.

When I change the interface's configuration (/etc/sysconfig/network-scripts/ifcfg-mgmt), every time when I reboot the template or create new ones (also a new boot), the VE retrieves its default configuration without my adaptations. Here is the change that I've been doing into the /etc/sysconfig/network-scripts/ifcfg-mgmt:

# /etc/sysconfig/network

DEVICE=mgmt

TYPE=Bridge

BOOTPROTO=static

USERCTL=no

NM_CONTROLLED=no

NETWORKING=yes

NETWORKING_IPV6=yes

IPV6INIT=yes

IPV6_AUTOCONF=yes

ONBOOT=yes

After saving that, I'm also doing:

• tmsh modify /sys db ipv6.enabled value true
• Setting /var/run/config/sshd_config AddressFamily any

Note that VMware vApp of that template has:

• Deployment allocation: static - manual IPv6
• Creation: IP protocol IPv4, IPv6

Using Ansible vmware_guest module or Terraform vSphere provider to create a new instance with MGMT IPv6 address, the VM doesn't take the IP address that I'm trying to give. At each attempt, the /etc/sysconfig/network-scripts/ifcfg-mgmt initial configuration comes back with these default values:

DEVICE=mgmt

TYPE=Bridge

DELAY=0

STP=off

BOOTPROTO=dhcp

DHCPV6C=yes

ONBOOT=yes

NOZEROCONF=yes

Any tips. Could you please help me? Thank you in advance. B regards.