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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/1488730

Title:
  ping the external network ip, clear external-gateway and then set the
  external-gateway back, the connection is not recoverd due to conntrack

Status in neutron:
  Fix Released

Bug description:
  I found a small bug on kilo version: ping the external network ip,
  clear external-gateway and then set the external-gateway back, the
  ping connection is not recoverd due to conntrack.

  here is the detailed operations:
  1. make sure a vm is connected to a router: "router1", and the router is connected to an external network.
  2. ping the external network in a vm, it should be successful:
  # ping 8.8.8.8
  3. clear the external-gateway, now the ping connection is dropped.
  # neutron router-gateway-clear router1
  4. set the external-gateway back, "public" is an external network.
  # neutron router-gateway-set router1 public

  Now, I found the ping connection is not recovered, my investigation
  shows this is due to conntrack state issue.

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