Hello,
passing from old manual to current OVN in 4.3.1 it seems I have some problems with OVN now.
I cannot assign network on OVN to VM (powered on or off doesn't change).
When I add//edit a vnic, they are not on the possible choices
Environment composed by three hosts and one engine (external on vSphere).
The mgmt network during time has been configured on network named ovirtmgmntZ2Z3
On engine it seems there are 2 switches for every defined ovn network (ovn192 and ovn172)
Below some output of commands in case any inconsistency has remained and I can purge it.
Thanks in advance.

Gianluca

- On manager ovmgr1:

[root@ovmgr1 ~]# ovs-vsctl show
eae54ff9-b86c-4050-8241-46f44336ba94
    ovs_version: "2.10.1"
[root@ovmgr1 ~]# 

[root@ovmgr1 ~]# ovn-nbctl show
switch 32367d8a-460f-4447-b35a-abe9ea5187e0 (ovn192)
    port affc5570-3e5a-439c-9fdf-d75d6810e3a3
        addresses: ["00:1a:4a:17:01:73"]
    port f639d541-2118-4c24-b478-b7a586eb170c
        addresses: ["00:1a:4a:17:01:75"]
switch 6110649a-db2b-4de7-8fbc-601095cfe510 (ovn192)
switch 64c4c17f-cd67-4e29-939e-2b952495159f (ovn172)
    port 32c348d9-12e9-4bcf-a43f-69338c887cfc
        addresses: ["00:1a:4a:17:01:72 dynamic"]
    port 3c77c2ea-de00-43f9-a5c5-9b3ffea5ec69
        addresses: ["00:1a:4a:17:01:74 dynamic"]
switch 04501f6b-3977-4ba1-9ead-7096768d796d (ovn172)
    port 0a2a47bc-ea0d-4f1d-8f49-ec903e519983
        addresses: ["00:1a:4a:17:01:65 dynamic"]
    port 8fc7bed4-7663-4903-922b-05e490c6a5a1
        addresses: ["00:1a:4a:17:01:64 dynamic"]
    port f2b64f89-b719-484c-ac02-2a1ac8eaacdb
        addresses: ["00:1a:4a:17:01:59 dynamic"]
    port f7389c88-1ea1-47c2-92fd-6beffb2e2190
        addresses: ["00:1a:4a:17:01:58 dynamic"]
[root@ovmgr1 ~]# 

- On host ov200 (10.4.192.32 on ovirtmgmntZ2Z3):
[root@ov200 ~]# ovs-vsctl show
ae0a1256-7250-46a2-a1b6-8f0ae6105c20
    Bridge br-int
        fail_mode: secure
        Port br-int
            Interface br-int
                type: internal
        Port "ovn-ddecf0-0"
            Interface "ovn-ddecf0-0"
                type: geneve
                options: {csum="true", key=flow, remote_ip="10.4.192.33"}
        Port "ovn-b8872a-0"
            Interface "ovn-b8872a-0"
                type: geneve
                options: {csum="true", key=flow, remote_ip="10.4.192.34"}
    ovs_version: "2.10.1"
[root@ov200 ~]# 

- On host ov300 (10.4.192.33 on ovirtmgmntZ2Z3):

[root@ov300 ~]# ovs-vsctl show
f1a41e9c-16fb-4aa2-a386-2f366ade4d3c
    Bridge br-int
        fail_mode: secure
        Port br-int
            Interface br-int
                type: internal
        Port "ovn-b8872a-0"
            Interface "ovn-b8872a-0"
                type: geneve
                options: {csum="true", key=flow, remote_ip="10.4.192.34"}
        Port "ovn-1dce5b-0"
            Interface "ovn-1dce5b-0"
                type: geneve
                options: {csum="true", key=flow, remote_ip="10.4.192.32"}
    ovs_version: "2.10.1"
[root@ov300 ~]# 

- On host ov301 (10.4.192.34 on ovirtmgmntZ2Z3):
[root@ov301 ~]# ovs-vsctl show
3a38c5bb-0abf-493d-a2e6-345af8aedfe3
    Bridge br-int
        fail_mode: secure
        Port "ovn-1dce5b-0"
            Interface "ovn-1dce5b-0"
                type: geneve
                options: {csum="true", key=flow, remote_ip="10.4.192.32"}
        Port "ovn-ddecf0-0"
            Interface "ovn-ddecf0-0"
                type: geneve
                options: {csum="true", key=flow, remote_ip="10.4.192.33"}
        Port br-int
            Interface br-int
                type: internal
    ovs_version: "2.10.1"
[root@ov301 ~]# 

In web admin gui:

In network -> networks -> 
- ovn192
Id: 8fd63a10-a2ba-4c56-a8e0-0bc8d70be8b5
VDSM Name: ovn192
External ID: 32367d8a-460f-4447-b35a-abe9ea5187e0

- ovn172
Id: 7546d5d3-a0e3-40d5-9d22-cf355da47d3a
VDSM Name: ovn172
External ID: 64c4c17f-cd67-4e29-939e-2b952495159f