[Openstack] Networking - next step?

Kevin Benton kevin at benton.pub
Thu Jun 30 05:07:30 UTC 2016


>But unfortunately (?) they're all on the Compute node for some reason!?
>While the DHCP network namespaces (but no interfaces) end up on the
>Control node!

It shouldn't matter which node they land on because the networks should be
able to reach any node. If you don't see the DHCP agent's interfaces check
the DHCP agent log for any errors.

On Wed, Jun 29, 2016 at 1:05 PM, Turbo Fredriksson <turbo at bayour.com> wrote:

> On Jun 29, 2016, at 4:10 PM, Kevin Benton wrote:
>
> > No, just remove the interfaces from whichever one is your integration
> > bridge.
>
> Ok, my network seems to be back on track. I deleted the router and all
> the networks and subnets and recreated them and now all the interfaces
> are as they should be.
>
> But unfortunately (?) they're all on the Compute node for some reason!?
> While the DHCP network namespaces (but no interfaces) end up on the
> Control node!
>
>
> Could that be because DHCP offers doesn't reach the instance? Shouldn't
> the router/dhcp namespaces/interfaces be reversed?
>
> > you intend 'br-physical' to be the equivalent of 'br-ex' in the example
> > scenario,
>
> Yes, that's correct.
>
> > […] in which case its fine to have an interface in it and you should
> > have a bridge_mapping entry for it in the L2 agent.
>
> Ok, got both of that..
>
> > So br-physical should have a real interface in it and br-provider should
> > not have any.
>
> Ok, done.
>
> > Let's assume you just want two networks to start. Your external network
> is
> > using the br-physical bridge with flat segmentation (a.k.a. untagged). So
> > your VM network needs to either have another bridge with a different
> > interface or it needs to use another encapsulation (e.g. VLAN or VXLAN)
> to
> > keep the traffic between the two isolated.
>
> Ok, thanx for the clarification. I don't see the need for that at the
> moment,
> but I'll keep that in mind for the future.
> --
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> make as they go by.
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>
>
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