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[Rodolfo Alonso <2007938@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

When setting the IPv6 address for the metadata interface [2], it could
happen that the IPv6 address can be considered as duplicated [2].

I can't provide a way to replicate this issue as it is happening
randomly. The IPv6 address in the DHCP namespace is set as "dadfailed
tentative".

[2]https://github.com/openstack/neutron/blob/8455edda46b4a465e2f184b59ad31476ce79c6c4/neutron/agent/metadata/driver.py#L244-L246
[1]https://paste.opendev.org/show/bXDAHSHpvEAIHwdPjxrB/

** Affects: neutron
     Importance: Undecided
     Assignee: Rodolfo Alonso (rodolfo-alonso-hernandez)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Rodolfo Alonso (rodolfo-alonso-hernandez)

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https://bugs.launchpad.net/bugs/2007938

Title:
  [DHCP] Metadata IPv6 duplicated address when setting the interface

Status in neutron:
  New

Bug description:
  When setting the IPv6 address for the metadata interface [2], it could
  happen that the IPv6 address can be considered as duplicated [2].

  I can't provide a way to replicate this issue as it is happening
  randomly. The IPv6 address in the DHCP namespace is set as "dadfailed
  tentative".

  [2]https://github.com/openstack/neutron/blob/8455edda46b4a465e2f184b59ad31476ce79c6c4/neutron/agent/metadata/driver.py#L244-L246
  [1]https://paste.opendev.org/show/bXDAHSHpvEAIHwdPjxrB/

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