---
features:
  - |
    The IPv6 addressing mode is now configurable for the undercloud
    provisioning network. The option ``ipv6_address_mode`` (default:
    ``dhpcv6-stateless``) in undercloud.conf is used to control the addressing
    mode. Possible values:

    - **dhpcv6-stateless**: Address configuration using RA and optional
      information using DHCPv6.
    - **dhcpv6-stateful**:  Address configuration and optional information
      using DHCPv6.