China Mobile China Mobile Huawei Technologies Verizon Communications Inc. Huawei Technologies BGP Flow Specification (FlowSpec) [RFC8955] and [RFC8956] has been proposed to distribute BGP [RFC4271] FlowSpec NLRI to FlowSpec clients to mitigate (distributed) denial-of-service attacks, and to provide traffic filtering in the context of a BGP/MPLS VPN service. Recently, traffic steering applications in the context of SR-MPLS and SRv6 using FlowSpec also attract attention. This document introduces the usage of BGP FlowSpec to steer packets into an SR Policy.