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[Akihiro Motoki <1533034@xxxxxxxxxxxxxxxxxx>]

The error message is returned from neutron.

** Project changed: python-neutronclient => neutron

** Tags added: l3-ipam-dhcp

** Changed in: neutron
       Status: New => Confirmed

** Changed in: neutron
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1533034

Title:
  an unclear error info returned when create an ipv6 subnetpool
  associate to ipv4 address scope

Status in neutron:
  Confirmed

Bug description:
  [Summary]
  an unclear error info returned when create an ipv6 subnetpool associate to ipv4 address scope
  [Topo]
  devstack all-in-one node

  [Description and expect result]
  need to return a clear error info

  [Reproduceable or not]
  reproduceable 

  [Recreate Steps]
  1) create an ipv4 address scope:
  root@45-59:/opt/stack/devstack# neutron address-scope-create   
  --tenant-id ebbcdabd911340efa9a3430488c43304 scope1 --ip_version 4
  Created a new address_scope:
  +------------+--------------------------------------+
  | Field      | Value                                |
  +------------+--------------------------------------+
  | id         | 8902c850-5e2a-41fd-898e-204d9cf0429e |
  | ip_version | 4                                    |
  | name       | scope1                               |
  | shared     | False                                |
  | tenant_id  | ebbcdabd911340efa9a3430488c43304     |
  +------------+--------------------------------------+

  2) create an ipv6 subnetpool associate to the ipv4 address scope, 
  an unclear error info returned:
  root@45-59:/opt/stack/devstack#  neutron subnetpool-create --pool-prefix 
  2::1/64 --address-scope scope1 pool1
  Illegal subnetpool association: subnetpool <built-in function id> cannot 
  associate with address scope 8902c850-5e2a-41fd-898e-204d9cf0429e because 
  subnetpool ip_version is not 4.
  root@45-59:/opt/stack/devstack# 

  ISSUE: "subnetpool <built-in function id>" is unclear, also not
  readable for user

  [Configration]
  reproduceable bug, no need

  [logs]
  reproduceable bug, no need

  [Root cause anlyze or debug inf]
  reproduceable bug

  [Attachment]
  None

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