iptables의 chain이 적용되는 순서를 쉽게 보고싶다면 http://atoato88.hatenablog.com/entry/2014/01/25/133852 를 참조~
+--------------------------------+
| v
+-------------------------+ +--------------------------+ +------------------------------+ +------------------------------+ +------------------------------+
| FORWARD | --> | neutron-openvswi-FORWARD | --> | neutron-openvswi-sg-chain | --> | neutron-openvswi-i286a46e9-d | --> | neutron-openvswi-sg-fallback |
+-------------------------+ +--------------------------+ +------------------------------+ +------------------------------+ +------------------------------+
| ^
+-------------------------------+ |
v |
+-------------------------+ +--------------------------+ +------------------------------+ |
| OUTPUT | --> | neutron-filter-top | --> | neutron-openvswi-local | |
+-------------------------+ +--------------------------+ +------------------------------+ |
| |
| |
v |
+-------------------------+ |
| neutron-openvswi-OUTPUT | |
+-------------------------+ |
+-------------------------+ +--------------------------+ +------------------------------+ |
| INPUT | --> | neutron-openvswi-INPUT | --> | neutron-openvswi-o286a46e9-d | -------------------------------------------+
+-------------------------+ +--------------------------+ +------------------------------+
|
|
v
+-------------------------+ +------------------------------+
| nova-api-FORWARD | | neutron-openvswi-s286a46e9-d |
+-------------------------+ +------------------------------+
+-------------------------+
| nova-api-INPUT |
+-------------------------+
+-------------------------+
| nova-api-OUTPUT |
+-------------------------+
+-------------------------+
| nova-api-local |
+-------------------------+
+-------------------------+
| nova-filter-top |
+-------------------------+
thanks rick