Hi together, 
I'm wondering why ovs was integrated into openstack in the way it is

Especially I would like to understand
- why does every physical interface have its own bridge? (I guess you
could also plug it directly into the br-int)
- and why does the br-int use vlan separation and not directly the
configured tenant-network-type separation (e.g. vxlan or something
else)? Tagging a packet with the internal vlan and then converting it to
the external vlan again looks strange to me in the first place.

It's just a feeling but this surely has impact on the performance. I
guess latency and cpu consumption will surely go up with this design.
Are there any technical or historical reasons for it? Or is it just to
reduce complexity?


(irc: scheuran)

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