[ovs-discuss] Tunnel packets from unknown VTEPs

[Ben Pfaff]

On Tue, Aug 21, 2018 at 03:45:34PM +0000, Paul Greenberg wrote:
> Currently, when a VXLAN packet comes to a host, but the source ip
> (chassis) of the packet is not in OVN SB database, packets are being
> dropped prior to getting to openvswitch.
> 
> How to make the packets reach the switch?

It would be necessary to make ovn-controller add a VXLAN port without
specifying a remote_ip.  This would require changes to the
ovn-controller C sources.

But this question raises two kinds of other issues.

First, OVN uses VXLAN only for connecting to hardware switches, which in
OVN are only useful for incorporating bare-metal physical hardware into
a logical network.  That's a pretty specialized use case.

Second, this would only be useful for one-way connectivity, because OVN
wouldn't have any idea when it should send packets back the other way.