[ovs-git] [ovn-org/ovn] 8087cb: ovn-northd.c: Add proxy ARP support to OVN

[BrendanDoyle1]

  Branch: refs/heads/master
  Home:   https://github.com/ovn-org/ovn
  Commit: 8087cbc74628e785250f8c09e43f5e0e361e453e
      https://github.com/ovn-org/ovn/commit/8087cbc74628e785250f8c09e43f5e0e361e453e
  Author: Brendan Doyle <brendan.doyle at oracle.com>
  Date:   2021-06-29 (Tue, 29 Jun 2021)

  Changed paths:
    M northd/ovn-northd.8.xml
    M northd/ovn-northd.c
    M ovn-nb.xml
    M tests/ovn.at

  Log Message:
  -----------
  ovn-northd.c: Add proxy ARP support to OVN

This patch provides the ability to configure proxy ARP IPs on a Logical
Switch Router port. The IPs are added as Options for router ports. This
provides a useful feature where traffic for a service must be sent to an
address in a logical network address space, but the service is provided
in a different network. For example an NFS service is provide to Logical
networks at an address in their Logical network space, but the NFS
server resides in a physical network. A Logical switch Router port can
be configured to respond to ARP requests sent to the service "Logical
address", the Logical Router/Gateway can then be configured to forward
the traffic to the underlay/physical network.

(Note: northd-ddlog part is missing which needs to be added).

Signed-off-by: Brendan Doyle <brendan.doyle at oracle.com>
Signed-off-by: Numan Siddique <numans at ovn.org>