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[yangjianfeng <1876092@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Test env:
Three compute node
One network node
Two ovs bridge binding to physical NIC and mapping to two physical_network respectively

Steps to reproduce:
1. Create two flat networks and subnets on physical_networks above mentioned respectively.
2. Then assocate both of them to a DVR router.
3. Create VMs on these two networks.
4. On one VM ping another VM 

When The VMs hosting on different nodes, sometimes, the VM which execute
ping will receice duplicate reply.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1876092

Title:
  DVR with Flat network result in ICMP reply DUP

Status in neutron:
  New

Bug description:
  Test env:
  Three compute node
  One network node
  Two ovs bridge binding to physical NIC and mapping to two physical_network respectively

  Steps to reproduce:
  1. Create two flat networks and subnets on physical_networks above mentioned respectively.
  2. Then assocate both of them to a DVR router.
  3. Create VMs on these two networks.
  4. On one VM ping another VM 

  When The VMs hosting on different nodes, sometimes, the VM which
  execute ping will receice duplicate reply.

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