[Openstack-operators] Multi nic configuration documentation

Joe Topjian joe.topjian at cybera.ca
Sun Aug 12 05:26:42 UTC 2012

Hi Janis,

The command to enable multi nic is in the link you gave:

nova-manage network create --fixed_range_v4= --num_networks=1
--network_size=256 --label=test --project=$your-project

You most likely already used the "nova-manage network create" command to
create a network when initially installing OpenStack. This command just
creates a second network with a different subnet and ties it to one
particular project (--project).

That's all that is needed. When you launch a new instance in that project,
the instance will automatically have two NICs. You will most likely have to
manually enable the interface inside the instance as most cloud images are
only configured for one interface.

Regarding your question about public ips: to my knowledge there is not a
way to assign a public IP directly on the instance. It is always hosted on
the server running nova-network.


On Fri, Aug 10, 2012 at 1:38 AM, Jānis Ģeņģeris <janis.gengeris at gmail.com>wrote:

> Hi all,
> I would like to test the multi nic setup for VMs. The only official
> documentation that I can find is here
> http://docs.openstack.org/essex/openstack-compute/admin/content/using-multi-nics.html.
> Although it has lots of nice graphics, but lacks description of how to
> configure it.
> I've seen on the list that people are using or trying to use this setup,
> maybe someone could share knowledge on how to configure the most basic
> setup. Also I would like to configure VMs so that the public IP is assigned
> to separate VM interface and visible with ifconfig from inside of the VM.
> Is this possible to do with FlatDHCP and without Quantum?
> Regards,
> --janis
> _______________________________________________
> OpenStack-operators mailing list
> OpenStack-operators at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators

Joe Topjian
Systems Administrator
Cybera Inc.


Cybera is a not-for-profit organization that works to spur and support
innovation, for the economic benefit of Alberta, through the use
of cyberinfrastructure.
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