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[OpenStack Infra <1420112@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/339253
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=4caabaf864f9bec62c4a78c7e9c4dc31ea5ef063
Submitter: Jenkins
Branch:    master

commit 4caabaf864f9bec62c4a78c7e9c4dc31ea5ef063
Author: Sivasathurappan Radhakrishnan <siva.radhakrishnan@xxxxxxxxx>
Date:   Thu Jul 7 21:58:32 2016 +0000

    Provide more duplicate VLAN network error info
    
    When user tries to create a network which VLAN ID is already
    used by another network, Network object will throw a DuplicateVlan
    exception. However, when the exception get propagate to the API level,
    it is only treated as a regular exception. This fix is to treat Duplicate
    Vlan exception as a special exception (similar to DuplicateCidr) so that
    users know more about what kind of duplicated setting they configured.
    
    Change-Id: Ib2f7bc90957d4ae5647adbbda05a87195549374d
    Closes-Bug: #1420112
    Co-Authored-By: kahou Lei<kahou82@xxxxxxxxx>


** Changed in: nova
       Status: In Progress => Fix Released

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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1420112

Title:
  Nova doesn't show enough error message when creating a new network
  with a duplicate vlan ID.

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  This happens when user tries to create a new network with a duplicate
  vlan ID:

  vagrant@ubuntu:~/devstack$ nova network-list
  +--------------------------------------+---------+-------------+
  | ID                                   | Label   | Cidr        |
  +--------------------------------------+---------+-------------+
  | a16f1896-da4c-4978-9776-0b6368129b07 | private | 10.0.0.0/24 |
  +--------------------------------------+---------+-------------+

  vagrant@ubuntu:~/devstack$ nova network-show  a16f1896-da4c-4978-9776-0b6368129b07 
  +---------------------+--------------------------------------+
  | Property            | Value                                
  +---------------------+--------------------------------------+
  | bridge              | br100                                   
  | bridge_interface    | eth1                            
  | broadcast           | 10.0.0.255                           
  | cidr                | 10.0.0.0/24                          
  | cidr_v6             | -                                    
  | created_at          | 2015-02-10T05:52:41.000000           
  | deleted             | False                                
  | deleted_at          | -                                    
  | dhcp_server         | 10.0.0.1                             
  | dhcp_start          | 10.0.0.3                             
  | dns1                | 8.8.4.4                              
  | dns2                | -                                    
  | enable_dhcp         | True                                 
  | gateway             | 10.0.0.1                             
  | gateway_v6          | -                                    
  | host                | -                                    
  | id                  | a16f1896-da4c-4978-9776-0b6368129b07 
  | injected            | False                                
  | label               | private                              
  | mtu                 | -                                    
  | multi_host          | False                                
  | netmask             | 255.255.255.0                        
  | netmask_v6          | -                                    
  | priority            | -                                    
  | project_id          | -                                    
  | rxtx_base           | -                                    
  | share_address       | False                                
  | updated_at          | -                                    
  | vlan                | 100                                  
  | vpn_private_address | 10.0.0.2                             
  | vpn_public_address  | -                                    
  | vpn_public_port     | 1000                                 
  +---------------------+--------------------------------------+

  
  vagrant@ubuntu:~/devstack$ nova network-create --fixed-range-v4 20.0.0.0/24 --vlan 100 vlan100
  ERROR (Conflict): There was a conflict when trying to complete your request. (HTTP 409) (Request-ID: req-634ac773-3fc7-4013-a319-69fbd4f1cca3)

  Contrary to other conflict such as subnet conflict, nova returns a
  clearer error message.

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