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[yujie <16189455@xxxxxx>]

Public bug reported:

In kilo + dvr environment, a running vm could not get the ip address sent by dhcp server.
1. Create a net with one subnet, setting no enable dhcp.
2. Create a vm in the subnet above, after it created successfully, it has no ip.
3. Setting the subnet enable dhcp, let the cirros vm created in step 2 exec "sudo udhcpc".
    Capturing packets in network node, the dhcp packet looks fine. But vm has no ip yet.
4. Reboot vm, it will get ip address.

The gateway setting on subnet has the same problem.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1514318

Title:
  running vm can not change its gateway and ip as the dhcp server send

Status in neutron:
  New

Bug description:
  In kilo + dvr environment, a running vm could not get the ip address sent by dhcp server.
  1. Create a net with one subnet, setting no enable dhcp.
  2. Create a vm in the subnet above, after it created successfully, it has no ip.
  3. Setting the subnet enable dhcp, let the cirros vm created in step 2 exec "sudo udhcpc".
      Capturing packets in network node, the dhcp packet looks fine. But vm has no ip yet.
  4. Reboot vm, it will get ip address.

  The gateway setting on subnet has the same problem.

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