[Openstack] How to support for multiple external networks?

Ray Sun xiaoquqi at gmail.com
Thu Nov 19 10:18:06 UTC 2015

I want to setup multiple external networks, but I don't know how to make
this works.

Here's my user requirements:
There are two departments want to use my cloud, but as history problem,
they wants their VMs to use original IP range. DepA wants to use floating
ip in, DepB wants to use floating ip in

I can create multiple subnets in my external network. But I am not quite
sure if this can work in OpenStack. In my network environment, and are two VLANs.

Anybody know how to implement this kind of scenarios? If this is not
possible, how can I design my architecture to meet the requirements.


Best Regards
-- Ray
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