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[OpenStack Infra <1682094@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/647484
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=1916bc5c0627ca24e312ca55ea62c8df7eb8f158
Submitter: Zuul
Branch:    master

commit 1916bc5c0627ca24e312ca55ea62c8df7eb8f158
Author: Nate Johnston <nate.johnston@xxxxxxxxxx>
Date:   Mon Mar 25 10:29:23 2019 -0400

    Allow first address in an IPv6 subnet as valid unicast
    
    When looking at the RFC [1], there's no mention that this can't be the
    gateway address.  Permit it.
    
    [1] https://tools.ietf.org/html/rfc4291#section-2.6.1
    
    Change-Id: I3f2905c2c4fca02406dfa3c801c166c14389ba41
    Fixes-Bug: #1682094


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

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https://bugs.launchpad.net/bugs/1682094

Title:
  Openstack dosen't allow the gateway to be the first address

Status in neutron:
  Fix Released

Bug description:
  If you try to set the first  address of an IPv6 subnet as gateway you
  get an error.


  Example to reproduce for an flat provider network:
  $ openstack network create  --share --provider-physical-network provider --provider-network-type flat test
  $ openstack subnet create --network test --subnet-range 2001:db8::/64 --ip-version 6 --ipv6-address-mode slaac --prefix-length 64 --gateway 200
  1:db8:: bull
  > HttpException: Bad Request, Invalid input for operation: Gateway is not valid on subnet.

  This is annoying, because radvd should be running on the smallest IP.
  And rdvd runs often on the Gateway.

  System:
  OpenStack ocata on CentOS

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