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Hello,

We using the following order when picking candidate port/portgroups when
attaching VIFs:

   - For Ironic <= Ocata
   1. portgroups
      2. ports with pxe_enabled=True
      3. any other ports

      - For Ironic >= Pike (port has new attribute physical_netowrk:
      1. portgroups with physical_network field set
      2. ports with physical_network field set
      3. portgroups without physical_network field
      4. ports without physical_network field
      5. ports with pxe_enabled = True
      6. other ports

In both cases pxe_enabled ports are prefered when connecting tenant VIF
compare to non-pxe ports.
You can configure fake portgroup with 1 port if you using Ironic <= Ocata
and Ironic will attach tenant VIF to portgroup (which will be actually your
second port). The drawback here is that nova will do portgroup
configuration via cloudinit on the instance.
Or add physical_network field to port you want to connect tenant network
to, but do not add it to other ports. Will work with ironic >= Pike


https://github.com/openstack/ironic/blob/stable/pike/ironic/drivers/modules/network/common.py#L506

On Wed, Dec 20, 2017 at 3:10 PM, Hieu LE <hieulq19 at gmail.com> wrote:

> Hello Ironic guys,
>
> In my lab environment, I have finished setting up the multi-tenant network
> environment for Ironic using networking-generic-switch (Cisco IOS device).
> The official Ironic doc only talked about one BM node with one port for
> provisioning and tenant network.
>
> My process here: I have created 2 ports, 01 port with pxe_enabled for
> provisioning network and remaining port with pxe disabled; then using nova
> boot with --nic option, hoping it can get network information via Neutron.
> But it failed.
>
> So my question here is:
> 1. Is this possible for enroll a node, then start provisioning it via one
> port and then configuring tenant network via another port?
> 2. Is my process correct, if not, could you provide some guides for the
> right way?
>
> Thanks,
> Hieu.
>
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