Hello,
Hope you are all doing well. We have an interesting thing going on and so 
wanted to share with you all for some ideas and feedback.
We configured a cluster with OVS switch and added an external network with 
subnet. So OVN started managing the subnet using DHCP. But here's the problem. 
When we add a nic with this network, an ip is assigned by DHCP. But we want an 
IP of our choice to be assigned. Here's what we tried. 
1. We tried using the ovn-nbctl lsp-set-address like ovn-nbctl 
lsp-set-addresses 7840c97b-73c2-4246-a2a8-0e9e5b7f420a "56:6f:6b:54:00:ec 
10.19.3.8" to update the static IP. But this does not persist a NIC unplug or a 
VM reboot.

So you might ask why not just try assigning a static IP and not add the 
external subnet. We want to use security groups. For security groups to work, 
the ip assigned to the NIC and the IP in the value for fixed_ips in `openstack 
port show` should be the same. So the same thing repeats here as well. If we 
use the `openstack port set` to update the fixed_ips, a NIC unplug or a VM 
reboot will remove the IP. 

We have an internal IPAM that provides us IPs during our automated 
provisioning. Did anyone try this or have any ideas how to work around this? 
The only option seems to be just use DHCP and then update that IP in our 
internal IPAM tool. 
Please let me know if I'm unclear and any more info is required.

Regards,
rav
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