All,

Project Calico [1] is an open source approach to virtual networking based on L3 
routing as opposed to L2 bridging.  In order to accommodate this approach 
within OpenStack, we've just submitted 3 blueprints that cover

-  minor changes to nova to add a new VIF type [2]
-  some changes to neutron to add DHCP support for routed interfaces [3]
-  an ML2 mechanism driver that adds support for Project Calico [4].

We feel that allowing for routed network interfaces is of general use within 
OpenStack, which was our motivation for submitting [2] and [3].  We also 
recognise that there is an open question over the future of 3rd party ML2 
drivers in OpenStack, but until that is finally resolved in Paris, we felt 
submitting our driver spec [4] was appropriate (not least to provide more 
context on the changes proposed in [2] and [3]).

We're extremely keen to hear any and all feedback on these proposals from the 
community.  We'll be around at the Paris summit in a couple of weeks and would 
love to discuss with anyone else who is interested in this direction. 

Regards,

Cory Benfield (on behalf of the entire Project Calico team)

[1] http://www.projectcalico.org 
[2] https://blueprints.launchpad.net/nova/+spec/vif-type-routed
[3] https://blueprints.launchpad.net/neutron/+spec/dhcp-for-routed-ifs
[4] https://blueprints.launchpad.net/neutron/+spec/calico-mechanism-driver

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