Yes, you should be able to create a shared/external network within Neutron
to accomplish this.


On Fri, Aug 22, 2014 at 7:25 AM, Bao Wang <bywan...@gmail.com> wrote:

> Thank you for your response. Could this be done naturally with Openstack
> neutron or have to be done manually outside neutron ?  As we are expecting
> to orchestrate hundreds of NFV with all similar network configuration,
> programmability is another key element.
>
>
> On Thu, Aug 21, 2014 at 3:52 PM, Kevin Benton <blak...@gmail.com> wrote:
>
>> Have you tried making the external network shared as well? Instances that
>> need a private IP with NAT attach to an internal network and go through the
>> router like normal. Instances that need a public IP without NAT would just
>> attach directly to the external network.
>>
>>
>> On Thu, Aug 21, 2014 at 7:06 AM, Bao Wang <bywan...@gmail.com> wrote:
>>
>>> I have a very complex Openstack deployment for NFV. It could not be
>>> deployed as Flat. It will have a lot of isolated private networks. Some
>>> interfaces of a group VM instances will need bridged network with their
>>> fixed IP addresses to communicate with outside world while other interfaces
>>> from the same set of VM should keep isolated with real private/fixed IP
>>> addresses. What happen if we use public IP addresses directly as fixed IP
>>> on those interfaces ? Will this work with Openstack neutron networking ?
>>> Will Openstack do NAT automatically on those ?
>>>
>>> Overall, the requirement is to use the fixed/public IP to communicate
>>> with outside directly on some interfaces of some VM instances while keeping
>>> others as private. The floating IP is not an option here
>>>
>>> _______________________________________________
>>> OpenStack-dev mailing list
>>> OpenStack-dev@lists.openstack.org
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>>>
>>>
>>
>>
>> --
>> Kevin Benton
>>
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>>
>
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-- 
Kevin Benton
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