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[Launchpad Bug Tracker <1632110@xxxxxxxxxxxxxxxxxx>]

[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1632110

Title:
  failure to add ipv6 address to interface causes backtrace

Status in neutron:
  Expired

Bug description:
  I have a v6 only subnet attached to a router who's gateway is v4
  (doesn't seem to hurt anything)...

  Anyway, I interface-delete and add the subnet to the router, waiting
  til l3-agent is done in-between and sometimes on of the commands will
  error out.  For example...

  2016-10-10 15:42:05.149 6116 DEBUG neutron.agent.linux.utils [-] Running command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-60d35bac-2b25-4a62-9a10-b22b89f6abab', 'ip', '-6', 'addr', 'add', '::8/64', 'scope', 'global', 'dev', 'qr-8a08f142-a6'] create_process /usr/lib64/python2.7/site-packages/neutron/agent/linux/utils.py:83
  2016-10-10 15:42:06.035 6116 ERROR neutron.agent.linux.utils [-] Exit code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: File exists

  What I find odd is that it doesn't try to add the interface again
  after the l3-agent restarts.  It does try and remove it after (which
  succeeds).

  Also, It tries to add the address and succeeds earlier, so it seems to
  be trying to add the address twice

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