Instances won't obtain IPv6 address and gateway when using Stateful DHCPv6 provided by OpenStack

Nir, can you post the result of "neutron port-list" and "ps -ef| grep dnsmasq" on your environment? Just want to check if dhcp port is created successfully and if dnsmasq works correctly.

Looks like this issue is a result of: https://bugs.launchpad.net/neutron/+bug/1377985

the patch is identified that enables RADVD to send RA in cases of DHCPv6 stateful usecase and then VM is able to acquire the IP address. whereas in some summit presentations and BP descriptions I found that RADVD is not to be used in case of DHCP stateful, and I am not able to understand the reason behind it and why dnsmasq was design to send RA in DHCP stateful use case. please bear with me I am new to contribute, so can someone educate me on this or provide some helpful references.

@Aniruddha, radvd is used for stateful setups too. In that case, it just advertises gateway and tells clients to get both address and additional configuration from DHCP servers.

Fix proposed to branch: master
Review: https://review.openstack.org/144189

Fix proposed to branch: master
Review: https://review.openstack.org/144630

Change abandoned by Aniruddha Singh Gautam (<email address hidden>) on branch: master
Review: https://review.openstack.org/144189
Reason: published the same changes on other branch.

can someone find time to review the patch Change-Id: If685846c0c0f67bf4c40f4f268b9d03bfa2b1654?

That makes stateful dhcp broken from user perspective, so targeting to kilo-2.

Even when you allow IPv6's ICMP to passthrough the security rules for RA, instances won't know to use DHCPv6 because radvd doesn't have the appropriate flag set:

https://github.com/openstack/neutron/commit/4f3a9135acb561172f7af45bc82739d6dc49f23c

Enables the slaac/slaac+stateful (for DNS), but does not enable stateful at all, this flag is missing:

AdvManagedFlag on;

Fix proposed to branch: master
Review: https://review.openstack.org/148203

Change abandoned by Aniruddha Singh Gautam (<email address hidden>) on branch: master
Review: https://review.openstack.org/144630
Reason: published another patch

can you please review the patch https://review.openstack.org/148203 again, this is my first code change so please bear with me...

updated the https://review.openstack.org/148203

Change abandoned by Aniruddha Singh Gautam (<email address hidden>) on branch: master
Review: https://review.openstack.org/148203
Reason: changes are submitted in patch#144630

Reviewed: https://review.openstack.org/144630
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=1f337c761bf73df050e435214935c498a2b3d028
Submitter: Jenkins
Branch: master

commit 1f337c761bf73df050e435214935c498a2b3d028
Author: singhannie <email address hidden>
Date: Wed Dec 31 03:47:38 2014 -0800

    Configures RADVD to send managed flag in RA
    for DHCP_STATEFUL

    RADVD process is configured so that it sends
    managed flag in RA for the subnets with
    ra_mode set to DHCP_STATEFUL. UT case is
    updated to check the presence of managed
    flag in config file of RADVD for
    DHCP_STATEFUL.

    Change-Id: If685846c0c0f67bf4c40f4f268b9d03bfa2b1654
    Closes-Bug: #1377843

Fix proposed to branch: stable/juno
Review: https://review.openstack.org/152841

Reviewed: https://review.openstack.org/152841
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=3f73028a1ed7793d2a53cdc5dce365cab78f9634
Submitter: Jenkins
Branch: stable/juno

commit 3f73028a1ed7793d2a53cdc5dce365cab78f9634
Author: singhannie <email address hidden>
Date: Wed Dec 31 03:47:38 2014 -0800

    Configures RADVD to send managed flag in RA
    for DHCP_STATEFUL

    RADVD process is configured so that it sends
    managed flag in RA for the subnets with
    ra_mode set to DHCP_STATEFUL. UT case is
    updated to check the presence of managed
    flag in config file of RADVD for
    DHCP_STATEFUL.

    Change-Id: If685846c0c0f67bf4c40f4f268b9d03bfa2b1654
    Closes-Bug: #1377843
    (cherry picked from commit 1f337c761bf73df050e435214935c498a2b3d028)