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Campus Network Design Fundamentals


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Table of Contents

Contents IntroductionxviiiPart I Designing Networks2Chapter 1 Network Design4What Is Design?5Design Principles7Determining Requirements9Analyzing the Existing Network11Preparing the Preliminary Design12Completing the Final Design Development12Deploying the Network12Monitoring and Redesigning13Maintaining Design Documentation13Modular Network Design14What Is Modular Design?14Hierarchical Network Design15The Cisco Enterprise Composite Network Model18Summary24Part II Technologies: What You Need to Know and Why You Need to Know It26Chapter 2 Switching Design28Making the Business Case29Switching Types30Layer 2 Switching30 Layer 3 Switching33Spanning-Tree Protocol34Redundancy in Layer 2 Switched Networks35STP Terminology and Operation36Virtual LANs40VLAN Membership42Trunks42STP and VLANs44VLAN Trunking Protocol45Inter-VLAN Routing46Multilayer Switching and Cisco Express Forwarding47Multilayer Switching47Cisco Express Forwarding49Switching Security50Catalyst Native Security51Catalyst Hardware Security53Switching Design Considerations53Summary55Chapter 3 IPv4 Routing Design58Making the Business Case59IPv4 Address Design60Determining How Many IP Addresses Are Required61Using Private and Public Addresses and NAT61How Routers Use Subnet Masks63Determining the Subnet Mask to Use64Hierarchical IP Address Design and Summarization67Variable-Length Subnet Masks70IPv4 Routing Protocols74Classifying Routing Protocols75Metrics79Convergence Time80Route Summarization81Routing Protocol Comparison82IPv4 Routing Protocol Selection94Choosing Your Routing Protocol94Redistribution, Filtering, and Administrative Distance95Summary98Chapter 4 Network Security Design100Making the Business Case101Hacking103Types of Hackers104Vulnerabilities104Design Issues105Human Issues105Implementation Issues105Threats106Reconnaissance Attacks106Access Attacks106Information Disclosure Attacks107Denial of Service Attacks108Mitigating Technologies111Threat Defense111Secure Communication117Trust and Identity121Network Security Best Practices124SAFE Campus Design125Summary129Chapter 5 Wireless LAN Design130Making the Business Case131Wireless Technology Overview132Wireless Standards133Wireless Components135Wireless Security137Wireless Security Issues138Wireless Threat Mitigation138Wireless Management141Wireless Design Considerations143Site Survey143WLAN Roaming144Point-to-Point Bridging145Design Considerations for Wireless IP Phones145Summary146Chapter 6 Quality of Service Design148Making the Business Case149QoS Requirements for Voice, Data, Video, and Other Traffic151QoS Models153IntServ153DiffServ154QoS Tools154Classification and Marking155Policing and Shaping161Congestion Avoidance163Congestion Management164Link-Specific Tools166AutoQoS167QoS Design Guidelines168Summary170Chapter 7 Voice Transport Design172What Is Voice Transport?174Digitization175Packetization and Call Processing176Conversation and Control Traffic177Quality of Service177VoIP Components178IP Telephony Components179IP Infrastructure179IP Phones180Video Telephony181Call Processing181Applications181Voice Gateway182Voice Coding and Compression Techniques182Voice Compression182Voice Activity Detection184Compressed Real-Time Transport Protocol184Bandwidth Requirements185Definitions185Calculating Trunk Capacity or Bandwidth186Signaling Traffic Bandwidth188IP Telephony Design188Single-Site IP Telephony Design189Multisite Centralized IP Telephony Design189Multisite Distributed IP Telephony Design190Voice Security190IP Telephony Network Security Concerns191Platform Security Issues191Mitigating to Protect IP Telephony192Summary193Chapter 8 Content Networking Design196Making the Business Case197Content Networking198Content Caches and Content Engines199Transparent Caching200Nontransparent Caching201Reverse Proxy Caching203Content Routing204Direct Mode204WCCP Mode206Content Distribution and Management207Content Switching208Designing Content Networking209School Curriculum209Live Video and Video on Demand for a Corporation210Summary212Chapter 9 Network Management Design214Making the Business Case215ISO Network Management Standard216Network Management Protocols and Tools216Terminology217SNMP218MIB218RMON220Cisco NetFlow223Syslog224CiscoWorks225Other Tools225Managing a Network228Network Management Strategy228SLCs and SLAs228IP Service-Level Agreements229Network Management Design230Summary232Chapter 10 Other Enabling Technologies234IP Multicast235Internet Group Management Protocol (IGMP) and Cisco Group Management Protocol (CGMP)236Protocol Independent Multicast (PIM) Routing Protocol237Increasing Network Availability239Storage Networking242IP Version 6244Summary247Part III Designing Your Network: How to Apply What You Know250Chapter 11 Case Study Context: Venti Systems252Background Information and Context253Network Requirements After Acquisitions Are Complete257Summary263Chapter 12 Case Study Solution: Venti Systems264Design Model265Head Office267Branch Office270Remote Users271User Devices272Servers273Switching273Head-Office Switching274Branch-Office Switching275Remote User Switching275Security275Head-Office Security278Branch-Office Security281Remote User Security281IP Addressing and Routing Protocol281Head-Office IP Addressing and Routing Protocol281Branch-Office IP Addressing and Routing Protocol282Remote User IP Addressing and Routing Protocol283E-Mail283Head-Office E-Mail283Branch-Office E-Mail284Remote User E-Mail284QoS and Voice284Head-Office QoS and Voice284Branch-Office QoS and Voice288Remote User QoS and Voice288Wireless288Head-Office Wireless288Branch-Office Wireless288Remote User Wireless288Network Management289Head-Office Network Management289Branch-Office Network Management291Remote User Network Management291Future Considerations291Summary291Part IV Appendixes292Appendix A References294Appendix B Network Fundamentals300Appendix C Decimal-Binary Conversion340Appendix D Abbreviations3501587052229TOC121905

Promotional Information

For enterprises to take advantage of cost-saving, productivity-enhancing solutions, such as IP telephony and Wireless LANs, their core infrastructure must include the key enabling technologies required by these solutions and provide a resilient, secure foundation that can scale to business needs. As with any architecture, designing a solid foundation is the first step. Over the past decade, campus network design has evolved many times as new technologies have emerged and business needs have changed. IP telephony, IP video, and e-learning, allow enterprises to increase productivity. Wireless LANs expand the workplace to allow information and application access beyond an employee's desktop. Meanwhile, Internet worms and viruses are on the rise, increasing the need to find ways to protect networks and data, and to ensure the availability of the network resources. Campus Network Design Fundamentals is an all-in-one guide to switched Ethernet design that instructs readers on key LAN infrastructure components. The book provides insight into why each technology is important and how to apply this knowledge to create a campus network that includes as many or as few of today's productivity-enhancing applications as are needed in any given environment. Key topics covered through-out the book include switching, IP routing, Quality of Service (QoS), security, wireless LANs, voice transport, content networking, network management, IPv6, IP multicast, and storage networking.

About the Author

Diane Teare, CCNP(R), CCDP(R), is a 20-year veteran in the networking, training, and e-learning fields. Diane has extensive knowledge of network design and routing technologies and is a Cisco instructor with one of the largest Cisco Learning Partners. Catherine Paquet, CCSP , CCNP, works in the field of internetworking and security. Catherine has in-depth knowledge of security systems, remote-access, and routing technology. She is a Cisco instructor with one of the largest Cisco Learning Partners.

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