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[冯龙飞 <1533013@xxxxxxxxxxxxxxxxxx>]

** Also affects: networking-generic-switch
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1533013

Title:
  L2pop raises exception when deleting an unbound port

Status in Networking ML2 Generic Switch :
  New
Status in neutron:
  Fix Released

Bug description:
  Some brilliant individual introduced a regression during a refactor
  (https://review.openstack.org/#/c/263471/) that causes an exception to
  be raised when an unbound port is deleted. For example:

  neutron port-create --name=port some_network
  neutron port-delete port
  Deleted port: port

  In the neutron-server log we can see:
  http://paste.openstack.org/show/483517/

  Apart from the scary TRACE there's no real implications. What should
  have happened is an early return, so the l2pop mech driver shouldn't
  be doing anything in this case, and it's spamming the log with bogus
  information instead.

  Similarly, when updating the IP address of an unbound port, a 'chg_ip'
  RPC message is fanout when there's no need to do so.

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