>>> "It is recommended that users use a provider network rather than the L3
>>> agent to provide external network access until such time as network
>>> namespaces support is available."
>>>
>>> Do we have documentation on using provider networks in Quantum already?
>>>  Or do we need more detail here?
>>>
>>> Bob?
>>
>> I know this is documented upstream, but I'm not sure if its covered in
>> the RHOS documentation.
> 
> That's a negative, is this still going to be desirable/required once we have namespaces support?

Yes - definitely desirable, and maybe required. The same provider
attributes are needed to use a provider external network with the
l3-agent. With linuxbridge, this is the only way to define an external
network, and I recommend it for openvswitch (in place of setting
external_network_bridge = br-ex) as well. In general, I think we need to
support both direct access to external networks (as provider networks
that VMs connect to) and routed access to external networks (via
l3-agent + provider network).

-Bob