Hi, I'd like you to take a look at this patch for potential SecurityImpact. https://review.openstack.org/201650 Log: commit 5966efd573d8bb9d23abc7ad8bcd4f17d10ee3d4 Author: sridhargaddam <sridhar.gaddam at enovance.com> Date: Tue Jul 14 16:18:06 2015 +0000 Add IPv6 Address Resolution protection Similar to IPv4 arp protection support, this patch adds the necessary OVS rules to prevent ports attached to agent from sending any icmpv6 neighbor advertisement messages that contain an IPv6 address not belonging to the port. For details please refer to "Figure 3. Attack against IPv6 Address Resolution" http://www.cisco.com/web/about/security/intelligence/ipv6_first_hop.html DocImpact SecurityImpact Partial-Bug: #1274034 Change-Id: I1f8311f1b9ae1be02afde3e9078e49c6da373a88