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

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

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

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https://bugs.launchpad.net/bugs/1105488

Title:
  linuxbridge agent needs ability to use pre-configured physical network
  bridges (nova-related)

Status in neutron:
  Fix Released
Status in OpenStack Compute (nova):
  Confirmed

Bug description:
  The linuxbridge agent currently creates a bridge for each physical
  network used as a flat network, moving any existing IP address from
  the interface to the newly created bridge. This is very helpful in
  some cases, but there are other cases where the ability to use a pre-
  existing bridge is needed. For instance, the same physical network
  might need to be bridged for other purposes, or the agent moving the
  system's IP might not be desired.

  I suggest we add a physical_bridge_mappings configuration variable,
  similar to that used by the openvswitch agent, alongside the current
  physical_interface_mappings variable. When a bridge for a flat network
  is needed, the bridge mappings would be checked first. If a bridge
  mapping for the physical network exists, it would be used. If not, the
  interface mapping would be used and a bridge for the interface would
  be created automatically. Sub-interfaces and bridges for VLAN networks
  would continue to work as they do now, created by the agent using the
  interface mappings.

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