Designing Enterprise Campus Networks © 2004 Cisco Systems, Inc. All rights reserved. Reviewing the Enterprise Network Design Methodology ARCH v1.22-1.

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Designing Enterprise Campus Networks © 2004 Cisco Systems, Inc. All rights reserved. Reviewing the Enterprise Network Design Methodology ARCH v1.22-1

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Campus Network

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Typical Requirements for an Enterprise Campus Network Functionality Performance Scalability Availability Manageability Cost-effectiveness

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Importance of Campus Infrastructure Modules Based on Design Criteria FunctionalityPerformanceScalabilityAvailabilityManageability Cost Effectiveness Building Access ImportantCriticalImportant Critical Building Distribution ImportantCritical ImportantCritical Campus Backbone ImportantCritical ImportantCritical Network Management NormalImportantNormalImportantCriticalImportant Server FarmCritical ImportantCritical Edge Distribution Important CriticalImportant

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Campus Design Methodology Used in This Course 1. Determine application and data requirements. 2. Design the logical network. 3. Design the physical network. 4. Select specific Cisco network devices at each location and create a network topology diagram. 5. Select an IP addressing strategy and numbering scheme. 6. Select routing protocols. 7. Design the Edge Distribution module.

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Example: Characterizing Applications Name of Application Location Type of Application Number of Users Number of Servers Bandwidth/ Delay Tolerance/ Loss Characteristics Marketing DSS Building 1 Database (OLAP) 1373 High bandwidth High delay tolerance Low loss Corporate Building Low bandwidth Low delay tolerance Low loss File server Building 3 File sharing (FTP) 481 Low bandwidth Medium delay tolerance Low loss

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Factors to Consider When Analyzing Traffic Traffic load measurements kbps per active user kbps per active segment Average and peak loads Traffic types Data Voice Video Sampling methods Weekdays versus weekends Holidays Type of traffic (data, voice, video) Apparent versus offered load Sample period Total number of samples taken Stability of the sample period

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Summary To design an enterprise campus network, you will design the Campus Infrastructure, Network Management, Server Farm, and Edge Distribution modules. An enterprise campus network must meet requirements for performance, scalability, and availability, as well as for functionality, cost-effectiveness, and manageability. Ciscos network designers have developed a simple process to design an enterprise campus network. Before designing the actual network, you should analyze the network traffic patterns for each application and location on the network. You will use the information to design the logical and physical network.