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[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/1548151

Title:
  Created two host-routes on one subnet by running two commands update
  host-route parameter in case of neutron server active-active

Status in neutron:
  Expired

Bug description:
  I had three controllers, I found a bug. I can create two host-route on
  one subnet by I run two commands update host-route parameter AT THE
  SAME TIME

  How to reproduce:

  Topology: http://codepad.org/ff0debPB

  Step 1: Create subnet with host-route is 172.16.69.0/26 and nexthop is 172.16.69.10
  $ neutron subnet-create --name sub-int-net --host-route destination=172.16.69.0/26,nexthop=172.16.69.10 test-net 172.16.69.0/24

  Step 2: Update host-route parameter
  Please running two commands AT THE SAME TIME

  - On Controller1
  $ neutron subnet-update --host-route destination=172.16.69.64/26,nexthop=172.16.69.10 sub-int-net

  - On Controller2
  $ neutron subnet-update --host-route destination=172.16.69.128/26,nexthop=172.16.69.20 sub-int-net

  The result:

  After create subnet:
  - This is result: http://codepad.org/eyX15Mnu

  After update subnet:
  - Show information subnet
    This is result: http://codepad.org/36C25S0f

  - Show information in "subnetroutes" tables:
    This is result: http://codepad.org/zrUh1CK8

  In originally, When we update host-route parameter, the system will
  remove the existing host-route and write a new host-route, which have
  value in command update . That mean: after update this subnet has only
  one host-route.

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