So I'm deploying openstack xena using kolla ansible, and i've used infiniband network to connect between the serves of my cluster, however I was wondering whether it is advisable to use a single interface for for "api_interface" and "storage_interface" and " tunnel_interface" or maybe

using separate interfaces would be better?

Furthermore, I want to ask if using ipoib for the infiniband network is a better option than a regular ethernet rg45 network.

Thank you all.