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Guide 2023 05 29T175625 183

DESIGN IMPLEMENTATION GUIDE LAN Design Guide for the Midmarket Introduction With the rapid adoption of Internet technologies and increasing consolidation of data voice and video on a common network infrastructure networks have become a critical component of a company ? s business infrastructure Scalable switching solutions based on Ethernet Fast Ethernet and Gigabit Ethernet have been introduced to handle the rising demand for more network bandwidth and higher performance Proper network designs are required to achieve the business objectives and to make the network a competitive advantage In this paper we present a structured approach to designing standards-based local area networks LANs for midmarket companies using the Catalyst family of stackable switches Midmarket companies are de ?ned as having to users While price performance ease of management and scalability continue to remain key requirements midmarket networks have evolved to supporting missioncritical applications such as e-commerce virtual private networks VPNs enterprise resource planning ERP and IP Telephony These applications are driving the deployment of intelligent network services for high availability and high performance ??features that in the past were typically only seen in larger campus network designs These new-generation applications have positioned Internet Protocol IP as the dominant protocol in midmarket networks In addition due to their attractive price-performance and scalability Ethernet LAN solutions have become the solutions of choice in these midmarket networks This document is targeted at systems engineers network design engineers and network managers catering to midmarket customers We assume that the reader has a basic knowledge of an Ethernet LAN Design concepts and examples outlined here are the result of extensive Cisco experience in building switched networks that provide reliability performance security and manageability and have been deployed by numerous customers worldwide In this paper we discuss the following major topics ? Applications Driving Di ?erentiated Services Networks ?? Summarizes key end-to-end requirements for missioncritical applications and introduce di ?erentiated services networks ? Structured Network Design ??Presents structured design techniques and de ?ne hierarchical requirements at the wiring closet and core backbone layer ? Intelligent Network Services ?? Outlines intelligent network services such as quality of service QoS high availability security and management services required to deliver di ?erentiated services ? Building Blocks for Structured Design and Design Examples ??Presents several design examples to cover an array of customer requirements in terms of price performance network size network services and scalability We develop these sample designs based on building blocks with well-de ?ned goals and characteristics ? Summary and Quick Reference ??Provides a quick reference guide to select the most appropriate design that meets your business requirements Cisco Con ?dential Copyright ? Cisco Systems Inc All Rights Reserved Page of CApplications Driving Di ?erentiated Services Networks Di ?erent business applications require di ?erent network characteristics in terms of throughput delay jitter and packet loss in order to make the user experience acceptable Unacceptable network delays for business applications such as SAP or Oracle transactions can hamper the productivity of a company and decrease its agility Hence a