Open Stack

Hi,

I have a two node openstack installation with quantum and ovs. I try to
create a provider network (network type = gre). I followed quantum api
guide and created GRE type of provider network as follows:
quantum net-create <name> --tenant_id <tenant-id>
--provider:network_type gre --provider:segmentation_id <tunnel-id>.
I also created subnet in a normal way and started a VM in this network.
>From controller node (from qdhcp-... namespace) I can ping/ssh to the VM
and I can see the gre tunnel-id in use between the controller and
compute node.

My problem is how to configure and connect an external device to this
provider network? If I use a linux PC for this purpose and configure a
gre tunnel towards openstack, what is the remote IP (=IP address in
openstack side) to be used? 
Is there any additional configuration steps in openstack side?

Best regards,
Johanna

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