Huawei Huawei Huawei Huawei BGP Flowspec mechanism (BGP-FS) propagates both traffic Flow Specifications and Traffic Filtering Actions by making use of the BGP NLRI and the BGP Extended Community encoding formats. This document specifies a new BGP-FS component type to support community-level filtering. The match field is the community of the source IP address that is encoded in the Flowspec NLRI. This function is applied in a single administrative domain.