[openstack-dev] [Neutron] VLAN trunking network for NFV

Darragh O'Reilly dara2002-openstack at yahoo.com
Wed Mar 25 10:44:34 UTC 2015

> *From:* Ian Wells [mailto:ijw.ubuntu at cack.org.uk]
> *Sent:* Wednesday, March 25, 2015 2:18 AM
> That spec ensures that you can tell what the plugin is doing.  You can ask
> for a VLAN transparent network, but the cloud may tell you it can't make
> one.
> If you want to use a VLAN trunk using the current code, I recommend VXLAN
> or GRE along with the Linuxbridge driver, both of which support VLAN
> transparent networking.  If they're configured and you ask for a VLAN trunk
> you'll be told you got one.The linuxbridge agent does not support GRE.I tried sending tagged packets over linuxbridge+VxLAN and it did not work - I didn't look into it any further.I also tried over linuxbridge+FLAT - this works when the physical switch ports are trunks - they would need to permit all VLAN ids to be fully "VLAN transparent". 
I think linuxbridge+VLAN would work too, as along as the switch ports are also configured for Q-in-Q.Currently the linuxbridge mechanism driver cannot know if a Neutron network is VLAN transparent or not.
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