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

[Wenxin Wang]

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.

[OpenStack Infra (hudson-openstack)]

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 <email address hidden>
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

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/liberty
Review: https://review.openstack.org/285373

[Thierry Carrez (ttx)]

This issue was fixed in the openstack/neutron 8.0.0.0b3 development milestone.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/285373
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=ec052cf212f21f77196299e236734c47564dea9e
Submitter: Jenkins
Branch: stable/liberty

commit ec052cf212f21f77196299e236734c47564dea9e
Author: Wenxin Wang <email address hidden>
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.

    Conflicts:
     neutron/agent/linux/ra.py

    Closes-Bug: #1531093
    Change-Id: Ied8d390a05ee1a2e544e39e887abf11c8a56abc3
    (cherry picked from commit 629d86d480c06569ba6bd5d9cd55a543dbf6221b)

[Thierry Carrez (ttx)]

This issue was fixed in the openstack/neutron 7.1.0 release.