During AIO-DX IPv6 node installation, the management address for
controller-1 set by dhclient receives a "/128" prefix length. The
cause comes from DHCPv6, which does not inform a prefix length on its
negotiation. The prefix should be learned via RA messages.
Since the internode IPv6 communications in StarlingX do not contain
a router and RA is in principle disabled on the management network,
we must set the system with the default prefix length of 64. A similar
patch was done for Centos.
Test Plan
[PASS] Install AIO-DX on IPv6 network, it is correctly setting the
controller-1 mgmt ip address after the first boot.
Story: 2009968
Task: 46184
Signed-off-by: Andre Fernando Zanella Kantek <AndreFernandoZanella.Kantek@windriver.com>
Change-Id: I2fce4e7fce7f4e1fd6902d24330d7621b238031a
93c481b975