Description of problem: OpenShift MetalLB team is requesting nmstate to support assigning static route to interface without any IPv4 address for their use case describe in https://itnext.io/configuring-routing-for-metallb-in-l2-mode-7ea26e19219e Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: