[openstack-dev] [Neutron] Campus Network Blueprint

Filipe Manco filipe.manco at gmail.com
Wed Jul 10 01:40:41 UTC 2013

Hi Kyle

I already looked at the blueprints and I want to integrate my work with
ML2, mainly because I want users to able to keep the traditional networking
models working in parallel (and I think ML2 is the best way to do this
comparing with the meta plugin).

To be honest, the integration with Neutron and the ML2 was what took most
of the time when writing the blueprint, but although I talk about it on the
blueprint I still not sure about the best way to do it.

About the concept of segments I don't think they fit. From what I
understand a segment, in the context of ML2, represents part of the virtual
network that uses some technology to connect a set of VMs, so if I delete a
segment those VMs will loose connectivity. In the context of my blueprint a
segment (or cSegment as I called it) represents a domain where I can create
virtual links across a set of nodes. If I delete a cSegment that doesn't
mean any VM will loose connectivity, what will happen is that the network
is remapped and the traffic will cross another cSegment or another set of

Something that I would like you (or other guys from ML2) to comment is how
to integrate new operations (beyond the ones related with the base data
model) in the ML2 interfaces. The MechanismDriver interface supports
operations on ports and networks, but as you can see I have new entities.
My idea is that there should be no changes to the original interfaces,
because this are specific to a type of network. What do you think?

It would help me if you have the time to take a look at the blueprint and
comment on the ML2 parts.

Thanks for your help!

Filipe Manco

2013/7/9 Kyle Mestery (kmestery) <kmestery at cisco.com>

> On Jul 9, 2013, at 11:18 AM, Filipe Manco <filipe.manco at gmail.com> wrote:
> >
> > Hi all,
> >
> > Just published a blueprint for some work I'm starting right now. I would
> appreciate if someone can take a look and give some comments.
> >
> > https://blueprints.launchpad.net/neutron/+spec/campus-network
> >
> > Thank you
> >
> Hi Filipe:
> At first glance, there appears to be a lot of overlap with ML2 here. Have
> you looked at the ML2 blueprints, and the specific use case of
> multi-segment networks? The ML2 team is working hard to close ML2
> blueprints in H2/H3, perhaps some of your ideas could be incorporated here?
> Here is the ML2 Meeting page which has links to the blueprints we're
> tracking:
> https://wiki.openstack.org/wiki/Meetings/ML2
> Thanks,
> Kyle
> >
> > Filipe Manco
> > http://about.me/fmanco
> > _______________________________________________
> > OpenStack-dev mailing list
> > OpenStack-dev at lists.openstack.org
> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
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