Open Stack

Hey Tom,

Adding the OpenStack discuss list as I think you got several replies from
there as well.

Thanks,

Amy (spotz)

On Mon, Jul 13, 2020 at 5:37 PM Thomas King <thomas.king at gmail.com> wrote:

> Good day,
>
> I'm bringing up a thread from June about DHCP relay with neutron networks
> in Ironic, specifically using unicast relay. The Triple-O docs do not have
> the plain config/neutron config to show how a regular Ironic setup would
> use DHCP relay.
>
> The Neutron segments docs state that I must have a unique physical network
> name. If my Ironic controller has a single provisioning network with a
> single physical network name, doesn't this prevent my use of multiple
> segments?
>
> Further, the segments docs state this: "The operator must ensure that
> every compute host that is supposed to participate in a router provider
> network has direct connectivity to one of its segments." (section 3 at
> https://docs.openstack.org/neutron/pike/admin/config-routed-networks.html#prerequisites -
> current docs state the same thing)
> This defeats the purpose of using DHCP relay, though, where the Ironic
> controller does *not* have direct connectivity to the remote segment.
>
> Here is a rough drawing - what is wrong with my thinking here?
> Remote server: 10.146.30.32/27 VLAN 2116<-----> Router with DHCP relay
> <------> Ironic controller, provisioning network: 10.146.29.192/26 VLAN
> 2115
>
> Thank you,
> Tom King
> _______________________________________________
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> openstack-mentoring at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-mentoring
>
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