[Openstack] Flat provider_network with vlan tagged interface or vlan provider_network with untagged interface

Abhijeet Rastogi abhijeet.1989 at gmail.com
Wed Dec 3 15:53:03 UTC 2014

Hi Antonio,

Thanks for the link. Could you explain a bit about "We want to avoid a
single point of failure, so we decided to give direct access to this
network from the compute node."?

What exactly did you mean by that?

On Wed, Dec 3, 2014 at 6:14 PM, Antonio Messina <antonio.messina at uzh.ch> wrote:
> On Wed, Dec 3, 2014 at 3:32 AM, Abhijeet Rastogi
> <abhijeet.1989 at gmail.com> wrote:
>> Hi everyone,
>> This is a very basic doubt and I'm trying to understand this
>> fundamental thing about creating networks in neutron. My ultimate goal
>> is to have all instances contain just one interface and a public IP on
>> them. Now, this public IP can only exist in a specific VLAN, lets say,
>> they'll only exist on eth0.123 (the is a vlan tagged interface on the
>> host and I can directly bind public IPs to them and they work
>> perfectly). I'm using linux bridge + ML2 as the plugin for neutron.
> Hi Kevin,
> I'm testing a similar deployment, since we will need it in our
> next-to-come cloud infrastructure.
> I've wrote my notes on what I have done so far at
> http://www.s3it.uzh.ch/blog/openstack-neutron-vlan/
> The main issue I have found so far is that if you want to create a
> single VLAN network and allow all tenants to attach VMs on that
> network, you also have to modify the policy.json file on the
> nova-compute. The problem with this solution is that it applies to
> *any* external network, also the ones you would like to use for
> floating IPs.
> .a.
> --
> antonio.s.messina at gmail.com
> antonio.messina at uzh.ch                     +41 (0)44 635 42 22
> S3IT: Service and Support for Science IT   http://www.s3it.uzh.ch/
> University of Zurich
> Winterthurerstrasse 190
> CH-8057 Zurich Switzerland

Abhijeet Rastogi (shadyabhi)

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