A customer read our docs and  came away with the erroneous conclusion that we don't support Geneve tunneling with ML2/OVN. The documentation correctly states the opposite: that Geneve is compatible with ML2/OVN and not ML2/OVS.

I think the docs are clear but we can go one step further, by updating this list in ML2 Network types.

As is:

You can operate multiple network segments at the same time. ML2 supports the use and interconnection of multiple network segments. You don't have to bind a port to a network segment because ML2 binds ports to segements with connectivity. Depending on the mechanism driver, ML2 supports the following network segment types:

• Flat
• VLAN
• GENEVE tunnels
• VXLAN and GRE tunnels
   Proposed:

You can operate multiple network segments at the same time. ML2 supports the use and interconnection of multiple network segments. You don't have to bind a port to a network segment because ML2 binds ports to segements with connectivity. Depending on the mechanism driver, ML2 supports the following network segment types:

• Flat
• VLAN
• GENEVE tunnels (OVN mechanism driver only)
• VXLAN tunnels 

I  also recommend dropping GRE because very few if any customers use it, and we don't want customers to use it.