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My compute node and my controller node are both physically connected to the
same switch, and they can talk to the same tagged VLAN.

The part I'm having trouble understanding is the network namespace. For
instance:

I have a provider VLAN on VLAN 100
The CIDR for VLAN 100 is 192.168.0.0/24

Is there an IP address on VLAN 100 for the physical interface? Or does that
IP range only exist in the network namespace? I understand that the DHCP
server listens on the network namespace. I'm trying to understand what must
exist OUTSIDE of that network namespace, on the physical interface that
hosts it (eth0).

On Fri, Jan 15, 2016 at 5:00 AM, Andreas Scheuring <
scheuran at linux.vnet.ibm.com> wrote:

> Hi John,
> the short answer: If you dhcp runs on the network node, then of course
> your network node must be attached to that provider network as well!
>
> Andreas (IRC: scheuran)
>
> On Do, 2016-01-14 at 22:08 -0800, John van Ommen wrote:
> > If I have a VM that's getting it's IP addresses from a VLAN provider
> > network, is it sufficient to have a network namespace that corresponds
> > to that network?
> >
> > Or do I also need to have a network interface on the server that
> > corresponds to it?
> >
> > For instance, if I have a provider network with a CIDR of
> > 192.168.0.1/24, and I have a network namespace that maps to that
> > provider network, is that sufficient? Or do I also need to have a
> > network interface on the control plane and network node in the same
> > CIDR?
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>
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