[Rdo-list] Metadata block until restart iptables

Hi, Configured multi node RDO setup on centos 6.5 with gre tunneling. Instances are spin up correctly but metadata not received to instances. When restart the iptables on compute node, metadata received only instances that spin up in that compute node. Seems like iptables issue, wonder how to figure it out. Is anyone notice this? highly appreciate your help. thanks -- Lakmal Warusawithana