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[OpenStack Infra <1552085@xxxxxxxxxxxxxxxxxx>]

** Changed in: neutron
       Status: Opinion => In Progress

** Changed in: neutron
     Assignee: (unassigned) => Adolfo Duarte (adolfo-duarte)

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https://bugs.launchpad.net/bugs/1552085

Title:
  Router Interfaces Are Instantiated in Compute Nodes Which do not need
  them.

Status in neutron:
  In Progress

Bug description:
  Pre-Conditions: three node dvr topology created with devstack script
  from master branch

  step-by-step:
  as " source openrc admin admin"  (adminstrator)

  Dvr routers is created
  Three Subnets are attached to it.
  Only one vm is instantiated  and attach to only one subnet.

  Expected Output:
  The router is instantiated in the same compute node as the vm with only ONE qr- interface attached to BR-INT bridge

  Actual Output:
  The router is instantiated on the same compute node as the vm and THREE qr- interfaces are added to the BR-INT  bridge.
  One for each of the subnets attached to the router.

  Problem:
  Only one interface is needed on the BR-INT, the one for the subnet the vm is attached to.
  The other two are not doing anything except consuming resources.

  Version: Mitaka (master on March 1st, 2016)
                   Ubuntu
  Perceived Severity:
     probably low. The presence of the other two unused interfaces does not affect functionality

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