I'm deploying openstack icehouse version with three-node architecture (controller node, network node, and compute node1) on Debian wheezy.I use ml2 plugin and gre type driver.

Now, I notice some exceptions information in both the ovs-agent.log of network node and compute node.

2014-07-16 01:55:37.756 29090 INFO neutron.plugins.openvswitch.agent.ovs_neutron_agent [req-185a38a4-7c00-4af6-ba83-b1872eb34bbd None] Agent initialized successfully, now running...
2014-07-16 01:55:37.762 29090 INFO neutron.plugins.openvswitch.agent.ovs_neutron_agent [req-185a38a4-7c00-4af6-ba83-b1872eb34bbd None] Agent out of sync with plugin!
2014-07-16 01:55:37.763 29090 INFO neutron.plugins.openvswitch.agent.ovs_neutron_agent [req-185a38a4-7c00-4af6-ba83-b1872eb34bbd None] Agent tunnel out of sync with plugin!
2014-07-16 01:55:37.778 29090 INFO neutron.openstack.common.rpc.common [req-185a38a4-7c00-4af6-ba83-b1872eb34bbd None] Connected to AMQP server on 192.168.0.11:5672

From http://openstack.redhat.com/forum/dis... , & https://lists.launchpad.net/openstack... . the first link prompts to add tcp connection in iptables, but I disable firewall rules. So this does not work.

Also, I refer as to source code of neutron ( https://github.com/openstack/neutron/... ), but have no idea.

I just want to understand why this information exists and then eliminate the information. Thanks in advance.