Exploring on the integration of vBRAS architecture and DPU technology

With the rapid development of 5G, cloud computing, and edge computing, metropolitan area networks (MANs), as critical hubs connecting users and core networks, face multifaceted challenges in bandwidth, latency, and flexibility. Focusing on the broadband remote access server (BRAS), its evolution from traditional closed hardware architectures to control-plane/user-plane (CU) separation was reviewed, and the technological advancements and advantages of the emerging data processing unit (DPU) network interface cards were explored. In particular, the technical solutions and challenges of implementing the BRAS forwarding plane using DPU-based network cards were analyzed in depth, providing theoretical references for operators to build highly resilient and low-latency next-generation MANs.