There is much discussion about wire-once strategies. I/O Virtualization (IOV) places a single high speed NIC (or two for redundancy) in each server in a rack. It does not address the legacy infrastructures and protocols that are in the data center right now. Most IT people are not interested in ripping out infrastructure that is already in place. IOV does can provide rack simplification without having to put in an entirely new infrastructure. As faster technologies become available and affordable, install them in the IOV gateway.”]
Source: https://www.darkreading.com/database-security/iov—a-different-way-to-wire-once