![]() Readers of this document should be familiar with basic data center networking, network quality of service (QoS), network queuing and buffering, TCP/IP, and TCP congestion-control mechanisms. It offers a cost-effective and sustainable solution to support the ever-increasing network speed and data traffic load. It uses an algorithm-based architectural approach to address the buffer requirements in modern data centers. Cisco intelligent buffer management includes approximate fair dropping (AFD) with elephant trap (ETRAP), and dynamic packet prioritization (DPP) functions. ![]() This document discusses the new intelligent buffer management functions in Cisco ® cloud-scale application-specific integrated circuits (ASICs) for Cisco Nexus ® 9000 Series Switches. Switches must be able to accommodate mixed intensive communication traffic flows with full throughput and low latency while also efficiently handling instantaneous bursts and microbursts to deliver excellent application performance. One important element in the design of new switches is buffer architecture and management. New data center switches need to be designed to meet these new requirements. All these new trends are demanding stringent throughput, latency, and scalability performance from data center networks. Heavily fan-in traffic patterns and microbursts are often seen with distributed applications. Intensive concurrent communications can occur among tens to hundreds or even thousands of servers. Server-to-server traffic is dominant in a modern data center. ![]() The new computing models, such as big data and real-time streaming processing, and application systems, such as in-memory computing and distributed machine learning, have changed workload and host communication patterns. Data Center Traffic Forwarding and Buffer Managementĭata Center Flow Distribution and Forwarding RequirementsĬhallenges for Switch Platforms with Simple Buffer ManagementĬisco Nexus 9000 Series Switches with Intelligent Buffer ManagementĪpproximate Fair Dropping (AFD) with Elephant TrapĪFD with Explicit Congestion Notification (ECN)Īpplying Queuing Policy with AFD to InterfacesĬonfiguring and Applying Queuing Policy with DPP Mice QueueĬisco Intelligent Buffer Management with Elephant FlowsĬisco Intelligent Buffer Management with Mice Flowsĭata center applications have been rapidly evolving in recent years. ![]()
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