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Description of problem:
OVN uses an OpenVSwitch bridge named br-int to connect its ports and do its have all its smart openflow rules. br-int is created and soly controlled by OVN. br-int can delegate its outgoing traffic either to a tunnel device, or to a simple-stupid OpenVSwitch bridge, e.g. brbond0, connected to a bonding device.

The administrator of the host is responsible to create the latter bridge and connect it to the proper interface.

In this RFE I am asking to let NM define such an interface. Just like NM is able to create a Linux bridge and connect it to an underlying connection, it should do the same for an OVS bridge.

Just like it can set an IP address on a Linux bridge, I'm requesting to create a port on a the OVS bridge, and configure the address there.

RHV does the latter on itself, but I believe that it would be better to implement this once, on the platform level.

Note that unlike Linux bond, OVS does not need to be connected through a vlan device in order to tag all outgoing traffic. A better implementation would be to vlan-tag the underlying interface within the OVS bridge.

https://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=79168a54344f8fb72fda88bf02bce908d2ce3f31

This should work but it doesn't:
nmcli conn add conn.type ovs-bridge conn.interface bridge0
nmcli conn add conn.type ovs-port conn.interface port1 conn.master bridge0
nmcli conn add type ethernet conn.interface eth2 conn.master port1 slave-type ovs-port

it works with dummy device:
nmcli conn add conn.type ovs-bridge conn.interface bridge0
nmcli conn add conn.type ovs-port conn.interface port1 conn.master bridge0
nmcli conn add type dummy conn.interface dummy0 conn.master port1 slave-type ovs-port

moving back to ON_QA as it looks blocking bug is fixed: bug 1519179

few bugs filed but generally working well, automated and running in CI.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0778

On rhel-8.0, this is solved by just dropping the "Requires: openvswitch".
See bug 1629178.

This bug is already added to Errata and is in status CLOSED. If you think that something needs to be fixed for rhel-7.y, please create a new bug.