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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => liberty-1

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https://bugs.launchpad.net/bugs/1437855

Title:
  Floating IPs should be associated with the first fixed IPv4 address

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  If a port attached to an instance has multiple fixed IPs and a
  floating IP is associated without specifying a fixed ip to associate,
  the behavior in Neutron is to reject the associate request. The
  behavior in Nova in the absence of a specified fixed ip, however, is
  to pick the first one from the list of fixed ips on the port.

  This is a problem if an IPv6 address is the first on the port because
  the floating IP will be NAT'ed to the IPv6 fixed address, which is not
  supported. Any attempts to reach the instance through its floating
  address will fail. This causes failures in certain scenario tests that
  use the Nova floating IP API when dual-stack IPv4+IPv6 is enabled,
  such as test_baremetal_basic_ops  in check-tempest-dsvm-ironic-pxe_ssh
  in https://review.openstack.org/#/c/168063

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