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[OpenStack Infra <1531093@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/262962
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=629d86d480c06569ba6bd5d9cd55a543dbf6221b
Submitter: Jenkins
Branch:    master

commit 629d86d480c06569ba6bd5d9cd55a543dbf6221b
Author: Wenxin Wang <stieizc.33@xxxxxxxxx>
Date:   Sat Jan 2 18:29:21 2016 +0800

    radvd prefix configuration for DHCPV6_Stateful RA
    
    When an IPv6 subnet's ipv6_ra_mode is set to DHCPV6_STATEFUL,
    the hosts on that subnet rely on router advertisement for the
    prefix length. This is important for subnets where the lengths
    of the prefixes are not 64.
    
    Closes-Bug: #1531093
    Change-Id: Ied8d390a05ee1a2e544e39e887abf11c8a56abc3


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

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https://bugs.launchpad.net/bugs/1531093

Title:
  radvd config should have a prefix section when subnet's ipv6_ra_mode
  is DHCPV6_STATEFUL

Status in neutron:
  Fix Released

Bug description:
  Currently, when an IPv6 subnet has ipv6_ra_mode set to
  DHCPV6_STATEFUL, there will be no section in the relevant radvd config
  file about its prefix. However, instances on that subnet still relies
  on RA for settings that DHCPv6 does not provide, like prefix length,
  and the M bit. As of the prefix length, it seems that currently
  neutron assumes a /64 prefix (correct me if I'm wrong), but future
  version may need to handle prefixes with different lengths.

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