[openstack-dev] [Neutron][os-vif] Expanding vif capability for wiring trunk ports

Carl Baldwin carl at ecbaldwin.net
Fri Jun 10 22:00:49 UTC 2016

Here's a link directly to the current design proposal [1] that might
be of interest.

[1] https://review.openstack.org/#/c/318317/4/doc/source/devref/openvswitch_agent.rst@463

On Thu, Jun 9, 2016 at 5:31 PM, Carl Baldwin <carl at ecbaldwin.net> wrote:
> Hi,
> You may or may not be aware of the vlan-aware-vms effort [1] in
> Neutron.  If not, there is a spec and a fair number of patches in
> progress for this.  Essentially, the goal is to allow a VM to connect
> to multiple Neutron networks by tagging traffic on a single port with
> VLAN tags.
> This effort will have some effect on vif plugging because the datapath
> will include some changes that will effect how vif plugging is done
> today.
> The design proposal for trunk ports with OVS adds a new bridge for
> each trunk port.  This bridge will demux the traffic and then connect
> to br-int with patch ports for each of the networks.  Rawlin Peters
> has some ideas for expanding the vif capability to include this
> wiring.
> There is also a proposal for connecting to linux bridges by using
> kernel vlan interfaces.
> This effort is pretty important to Neutron in the Newton timeframe.  I
> wanted to send this out to start rounding up the reviewers and other
> participants we need to see how we can start putting together a plan
> for nova integration of this feature (via os-vif?).
> Carl Baldwin
> [1] https://review.openstack.org/#/q/topic:bp/vlan-aware-vms+-status:abandoned

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