Given a System Administrator is configuring a network to prioritize IPv6 usage in a dual stack v4/v6 environment using the NetworkManager's DHCP client, When they enable the RFC 8925 (IPv6-Only Preferred Option for DHCPv4) dhcp option 108 and initiate a network connection, Then during the DHCP DISCOVER process, the IPv6-mostly option should be sent to the server, and if the server responds affirmatively, IPv4 should not be enabled on the client. A retry for IPv4 should only occur after the server-defined period, while ensuring uninterrupted IPv6 connectivity. Definition of done: The implementation meets the acceptance criteria Unit tests and integration tests are written and pass The code is part of a downstream build attached to an errata The initial text for this enhancement in the feature-reason-result format (More details here )

.NetworkManager DHCP Client supports IPv6-only preferred option for DHCPv4 With this enhancement, the IPv6-only preferred option for DHCPv4 is available for NetworkManager clients for the supported DHCP server. You can use this option in two ways: globally and locally. If enabled globally, this option allows and prioritizes only IPv6 addresses in dual networks that support both IPv4 and IPv6. If enabled locally by setting the `ipv6.method disabled` option, IPv4 addresses assigned manually are prioritized over DHCP addresses.