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[yaobo <yaoboyoyo@xxxxxxx>]

Public bug reported:

With hierarchical port binding, when vm migrating across ToR switch, in the first step, vm port plug in br-int on new host, 
ovs agent get port details by calling get_devices_details_list, but the bottom vlan segment is old before port hostid is updated and bottom vlan segment is reallocated. Thus, ovs agent will add wrong network-related flows in ovs bridges.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1508126

Title:
  With hierarchical port binding, when vm migrating across ToR switch,
  ovs agent will add wrong network-related flows in ovs bridges on new
  host.

Status in neutron:
  New

Bug description:
  With hierarchical port binding, when vm migrating across ToR switch, in the first step, vm port plug in br-int on new host, 
  ovs agent get port details by calling get_devices_details_list, but the bottom vlan segment is old before port hostid is updated and bottom vlan segment is reallocated. Thus, ovs agent will add wrong network-related flows in ovs bridges.

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