This document discusses proposed extensions to the OpenStack Neutron networking service API to add higher-level abstractions for application developers. The current API focuses on physical network constructs like ports and subnets. The extensions define logical groupings of endpoints (EPGs) and policy rules specifying allowed network access between EPGs. This provides a more declarative and application-centric model, separating application and infrastructure concerns. An example shows how a multi-tier application could be defined using these new abstractions.