[neutron] How to specify overlay network interface when using OVN and Geneve?

Popoi Zen alterriu at gmail.com
Sun Aug 16 02:58:57 UTC 2020

Yeah, what I mean is tunnel network between instance when instance
communicate using selfservice network, can I specify from which host
interface/NIC that traffic goes through? I found this: `ovs-vsctl set open
. external-ids:ovn-encap-ip=IP_ADDRESS` is it righ?

And btw, what is the best practise when using OVN? Did I need setup bridge
for overlay interface and provider interface on my controller too? Since,
as my understanding, inbound/outbound will have direct access from compute
node by default on OVN. And in this guide [1] bridge only configured on
compute nodes.


On Sun, Aug 16, 2020 at 1:02 AM Sean Mooney <smooney at redhat.com> wrote:

> On Sat, 2020-08-15 at 19:36 +0200, Slawek Kaplonski wrote:
> > Hi,
> >
> > You can do that by configuring bridge_mappings on compute node(s).
> > It is described in the doc [1].
> when they said overlay network i think they meant the geneve tunnels in
> which
> casue you contole the interface that is used by adjusting your routing
> table to use the interface you desire.
> that can involve movein ipt to bridges or interface to  correctly set up
> the routes depending on your
> configurtion.
> but ya if you were refering to provider networks the link slawek porovide
> is proably what you want.
> >
> > On Fri, Aug 14, 2020 at 09:13:23PM +0700, Popoi Zen wrote:
> > > Hi, I have used my google fu but I cant find any reference. Just want
> to
> > > know how to specify overlay network when Im using geneve as my overlay
> > > protocol?
> >
> > [1]
> https://docs.openstack.org/neutron/latest/admin/ovn/refarch/provider-networks.html
> >
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