Paul, Sangwon, Tae-Jin, Sue, and Diego,

Thank you for putting this draft together, which is one of the deliverable of 
I2NSF charter.

Questions:

Page 3 last bullet: What is "SDN switch"?  What is "network-based firewall"? in 
the following context:
SDN can work as a network-based firewall system through a standard
interface between an SDN switch and a firewall function as a
vitual network function (VNF)

Do you mean Controller, Switch, and virtual network function can be combined 
together to filter traffic to achieve the function of "firewall"?


Section 5.1: Firewall: Centralized Firewall System
The wording is so close to the "centralized physical FW" where all traffic hair 
pinned through the "Centralized physical FW" to be filtered before going out or 
into network.
Your described scenario is more like "switch - FW" combined together to achieve 
packet filtering, where only some packets are sent to FW, vs. the traditional 
centralized physical FW requiring all packets to traverse the FW.

Correct?


Thanks, Linda
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