Comment 15 for bug 1501969

Reviewed: https://review.openstack.org/238990
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=765c7481645dd1ce389dd2b04a0021cd5bd93110
Submitter: Jenkins
Branch: stable/liberty

commit 765c7481645dd1ce389dd2b04a0021cd5bd93110
Author: Swaminathan Vasudevan <email address hidden>
Date: Mon Oct 19 22:02:38 2015 -0700

    Set security group provider rule for icmpv6 RA in DVR

    Security group provider rules for RA is set for the VM ports
    when a router interface is added or updated after the VM
    instance is created.

    In the case of DVR Routers the security group provider rule
    to allow the RA packets to flow through the VM port input
    chain was missing and so the VM was not able to get a
    SLAAC/DHCP address when associated with a DVR Router.

    This fix will add the security group rule to the VM port input
    chain to allow the RA packets to flow into the VM and hence
    the VM will obtain an IP address assigned by the Router.

    Closes-Bug: #1501969

    Change-Id: Ib0b3499d9c880fe1462734b2d4092debf4819509
    (cherry picked from commit a7dc528c1860f6a325a36bb7c633c60b635fc9a6)