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

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

** Changed in: nova
    Milestone: None => liberty-rc1

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https://bugs.launchpad.net/bugs/1488686

Title:
  Mac address on linux bridge can change depending on taps plugged in

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  When the linux bridge nova-network driver creates it's bridge, it
  makes an assumption that the bridge's mac will be the mac from the
  first device plugged into it. This is the case at first, when there is
  only one device. But, when more devices are plugged in, the default
  behavior is to take the lowest mac from all devices plugged in. This
  is a problem because there may be rules on the switch the initial
  interface is plugged into that prohibit traffic from anything but that
  interface's initial mac.

  What should happen is immediately after creating the bridge, if there
  is an interface available, the bridge's mac should be explicitly set
  to that interface's mac. This will effectively lock the mac on the
  bridge, and it will not try to use the lowest mac of all devices
  plugged in.

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