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[OpenStack Infra <1367500@xxxxxxxxxxxxxxxxxx>]

Fix proposed to branch: master
Review: https://review.openstack.org/123671

** Changed in: neutron
       Status: Invalid => In Progress

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https://bugs.launchpad.net/bugs/1367500

Title:
  IPv6 network doesn't create namespace, dhcp port

Status in OpenStack Neutron (virtual network service):
  In Progress

Bug description:
  IPv6 networking has been changed during last commits. 
  Create network and IPv6 subnet with default settings. Create port in the network:
  it doesn't create any namespace, it doesn't create DHCP port in the subnet, although port get IP from DHCP server.
  Although IPv4 networking continues to work as required.

  $ neutron net-create netto
  Created a new network:
  +-----------------+--------------------------------------+
  | Field           | Value                                |
  +-----------------+--------------------------------------+
  | admin_state_up  | True                                 |
  | id              | 849b4dbf-0914-4cfb-956b-e0cc5d8054ab |
  | name            | netto                                |
  | router:external | False                                |
  | shared          | False                                |
  | status          | ACTIVE                               |
  | subnets         |                                      |
  | tenant_id       | 5664b23312504826818c9cb130a9a02f     |
  +-----------------+--------------------------------------+

  $ neutron subnet-create --ip-version 6 netto 2011::/64
  Created a new subnet:
  +-------------------+----------------------------------------------------------+
  | Field             | Value                                                    |
  +-------------------+----------------------------------------------------------+
  | allocation_pools  | {"start": "2011::2", "end": "2011::ffff:ffff:ffff:fffe"} |
  | cidr              | 2011::/64                                                |
  | dns_nameservers   |                                                          |
  | enable_dhcp       | True                                                     |
  | gateway_ip        | 2011::1                                                  |
  | host_routes       |                                                          |
  | id                | e10300d1-194f-4712-b2fc-2107ac3fe909                     |
  | ip_version        | 6                                                        |
  | ipv6_address_mode |                                                          |
  | ipv6_ra_mode      |                                                          |
  | name              |                                                          |
  | network_id        | 849b4dbf-0914-4cfb-956b-e0cc5d8054ab                     |
  | tenant_id         | 5664b23312504826818c9cb130a9a02f                         |
  +-------------------+----------------------------------------------------------+

  $ neutron port-create netto
  Created a new port:
  +-----------------------+--------------------------------------------------------------------------------+
  | Field                 | Value                                                                          |
  +-----------------------+--------------------------------------------------------------------------------+
  | admin_state_up        | True                                                                           |
  | allowed_address_pairs |                                                                                |
  | binding:vnic_type     | normal                                                                         |
  | device_id             |                                                                                |
  | device_owner          |                                                                                |
  | fixed_ips             | {"subnet_id": "e10300d1-194f-4712-b2fc-2107ac3fe909", "ip_address": "2011::2"} |
  | id                    | 175eaa91-441e-48df-9267-bc7fc808dce8                                           |
  | mac_address           | fa:16:3e:26:51:79                                                              |
  | name                  |                                                                                |
  | network_id            | 849b4dbf-0914-4cfb-956b-e0cc5d8054ab                                           |
  | security_groups       | c7756502-5eda-4f43-9977-21cfb73b4d4e                                           |
  | status                | DOWN                                                                           |
  | tenant_id             | 5664b23312504826818c9cb130a9a02f                                               |
  +-----------------------+--------------------------------------------------------------------------------+

  $ neutron port-list | grep e10300d1-194f-4712-b2fc-2107ac3fe909
  | 175eaa91-441e-48df-9267-bc7fc808dce8 |      | fa:16:3e:26:51:79 | {"subnet_id": "e10300d1-194f-4712-b2fc-2107ac3fe909", "ip_address": "2011::2"}  |

  there is no DHCP port

  $ ip netns 
  qrouter-b7f94a05-8b02-4221-9330-bb2d470f6b0c
  (default namespace form devstack install)

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