Open Stack

I read through the proposed SFC API here:

http://docs.openstack.org/developer/networking-sfc/api.html

I'm looking at implementing what would be required to support this API
in OVN.  I have a prototype, but I had to make some pretty big
assumptions, so I wanted to clarify the intent of the API.

First, does it assume that all of the neutron ports in a chain are on
the same Neutron network?  That keeps things simple.  If its intended to
allow a chain of ports on different networks, is it just required that
you pick ports that all have addresses routable from one port to the
next in the chain?  An arbitrary set of ports can't always work, so
there has to be some bounds around what set of ports are valid to be in
a chain.

Second, where is it expected that the match is applied?  The API for
creating a port chain doesn't associate the chain with a network, but
just matching "globally" doesn't make any sense.  If all ports are
expected to be on the same network, is the match applied for any traffic
entering that network from any port?

I'm in Tokyo this week, so if the group working on this would like to
talk in person, that would be great too.

-- 
Russell Bryant