Hi, we are using L3 HA in our production environment now. Router instances communicate to each other by VRRP protocol. In my opinion, although VRRP is a control plane thing, but the real VRRP traffic is using data plane nic so that router namespaces can not talk to each other sometimes when the data plan is busy. If we were used etcd (or other), does every router instance register one "id" in etcd ? Thanks Zhi Chang -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20170213/acc6283e/attachment.html>