Comment 6 for bug 2017889

I'm not completely sure it is the exactly the same, but in the bgp-driver we not only enable ndp_proxy on br-ex but also configure it (something like ip nei proxy add...)

For the cr-lrp ports the wire_provider_port is called with proxy_cidrs information, which forces the call to [1], which ends up calling this [2]

[1] https://opendev.org/openstack/ovn-bgp-agent/src/branch/master/ovn_bgp_agent/drivers/openstack/utils/wire.py#L186
[2] https://opendev.org/openstack/ovn-bgp-agent/src/branch/master/ovn_bgp_agent/privileged/linux_net.py#L251