China Moblie New H3C Technologies China Moblie Network slicing provides the ability to partition a physical network into multiple isolated logical networks of varying sizes,structures, and functions so that each slice can be dedicated to specific services or customers. A Network Resource Partition (NRP) is a collection of resources in the underlay network. Each NRP is used as the underlay network construct to support one or a group of IETF network slice services. This document describes an IGP mechanism that is used to advertise a large number of NRPs into a smaller number of NRP groups.