Foreword Introduction Chapter 1 Network Fundamentals Review Introduction to Networks Protocols and the OSI Model The OSI Model Protocols The OSI Layers Physical Layer Layer 1 Data Link Layer Layer 2 Network Layer Layer 3 Transport Layer Layer 4 Upper Layers Layers 5 Through 7 Communication Among OSI Layers LANs and WANs Network Devices Terminology: Domains, Bandwidth, Unicast, Broadcast, and Multicast Hubs Switches Routers Introduction to the TCP/IP Suite TCP/IP Transport Layer Protocols Port Numbers TCP Sequencing, Acknowledgment, and Windowing TCP/IP Internet Layer Protocols Protocols IP Datagrams TCP/IP-Related Data Link Layer Protocol Routing Routers Work at the Lower Three OSI Layers Routing Tables Routing Protocols Addressing Physical Addresses Logical Addresses Routing and Network Layer Addresses IP Addresses IP Address Classes Private and Public IP Addresses Subnets Switching Types Layer 2 Switching Layer 3 Switching Spanning Tree Protocol Redundancy in Layer 2 Switched Networks STP Terminology and Operation STP Terminology STP States Rapid STP Virtual LANs VLAN Membership Trunks STP and VLANs Inter-VLAN Routing Comprehensive Example Summary Chapter 2 Applying a Methodology to Network Design The Cisco Service Oriented Network Architecture Business Drivers for a New Network Architecture Intelligence in the Network Cisco SONA Framework Network Design Methodology Design as an Integral Part of the PPDIOO Methodology Benefits of the Lifecycle Approach to Network Design Design Methodology Identifying Customer Requirements Assessing the Scope of a Network Design Project Identifying Required Information Extracting Initial Requirements Gathering Network Requirements Planned Applications and Network Services Organizational Goals Organizational Constraints Technical Goals Technical Constraints Characterizing the Existing Network and Sites Customer Input Sample Site Contact Information Sample High-Level Network Diagram Auditing or Assessing the Existing Network Tools for Assessing the Network Manual Information Collection Examples Automatic Information Collection Examples Analyzing Network Traffic and Applications Tools for Analyzing Traffic NBAR NetFlow Other Network Analysis Tools Examples Network Health Checklist Summary Report Creating a Draft Design Document Time Estimates for Performing Network Characterization Using the Top-Down Approach to Network Design The Top-Down Approach to Network Design Top-Down Approach Compared to Bottom-Up Approach Top-Down Design Example Decision Tables in Network Design Structured Design Network Design Tools Building a Prototype or Pilot Network Documenting the Design The Design Implementation Process Planning a Design Implementation Implementing and Verifying the Design Monitoring and Redesigning the Network Summary References Case Study: ACMC Hospital Network Upgrade Case Study Scenario Organizational Facts Current Situation Plans and Requirements Case Study Questions Review Questions Chapter 3 Structuring and Modularizing the Network Network Hierarchy Hierarchical Network Model Hierarchical Network Design Layers Access Layer Functionality The Role of the Access Layer Layer 2 and Multilayer Switching in the Access Layer Access Layer Example Distribution Layer Functionality The Role of the Distribution Layer Distribution Layer Example Core Layer Functionality The Role of the Core Layer Switching in the Core Layer Hierarchical Routing in the WAN Using a Modular Approach to Network Design Evolution of Enterprise Networks Cisco SONA Framework Functional Areas of the Cisco Enterprise Architecture Guidelines for Creating an Enterprise Network Enterprise Campus Modules Campus Infrastructure Module Building Access Layer Building Distribution Layer Campus Core Layer Server Farm Module Enterprise Campus Guidelines Enterprise Edge Modules E-commerce Module Internet Connectivity Module Remote Access and VPN Module WAN and MAN and Site-to-Site VPN Module Enterprise Edge Guidelines Service Provider Modules Internet Service Provider Module PSTN Module Frame Relay/ATM Module Remote Enterprise Modules Enterprise Branch Module Enterprise Data Center Module Enterprise Teleworker Module Services Within Modular Networks Interactive Services Security Services in a Modular Network Design Internal Security External Threats High-Availability Services in a Modular Network Design Designing High Availability into a Network High Availability in the Server Farm Designing Route Redundancy Designing Link Redundancy Voice Services in a Modular Network Design Two Voice Implementations IP Telephony Components Modular Approach in Voice Network Design Evaluating the Existing Data Infrastructure for Voice Design Wireless Services in a Modular Network Centralized WLAN Components Application Networking Services in a Modular Network Design ANS Examples ANS Components Network Management Protocols and Features Network Management Architecture Protocols and Standards SNMP SNMPv1 SNMPv2 SNMPv3 MIB MIB-II Cisco MIB MIB Polling Guidelines MIB Example RMON RMON1 RMON1 Groups RMON1 and RMON2 RMON2 Groups Netflow NetFlow Versus RMON Information Gathering CDP CDP Information How CDP Works Syslog Accounting Syslog Distributed Architecture Summary References Case Study: ACMC Hospital Modularity Review Questions Chapter 4 Designing Basic Campus and Data Center Networks Campus Design Considerations Designing an Enterprise Campus Network Application Characteristics and Considerations Peer-Peer Applications Client-Local Server Applications Client-Server Farm Applications Client-Enterprise Edge Applications Application Requirements Environmental Characteristics and Considerations Network Geography Considerations Transmission Media Considerations Infrastructure Device Characteristics and Considerations Convergence Time Multilayer Switching and Cisco Express Forwarding IP Multicast QoS Considerations in LAN Switches Load Sharing in Layer 2 and Layer 3 Switches Enterprise Campus Design Enterprise Campus Requirements Building Access Layer Design Considerations Managing VLANs and STP Managing Trunks Between Switches Managing Default PAgP Settings Implementing Routing in the Building Access Layer Building Distribution Layer Design Considerations Using First-Hop Redundancy Protocols Deploying Layer 3 Routing Protocols Between Building Distribution and Campus Core Switches Supporting VLANs That Span Multiple Building Access Layer Switches Campus Core Design Considerations Large Campus Design Small and Medium Campus Design Options Edge Distribution at the Campus Core Server Placement Servers Directly Attached to Building Access or Building Distribution Layer Switches Servers Directly Attached to the Campus Core Servers in a Server Farm Module Server Farm Design Guidelines Server Connectivity Options The Effect of Applications on Switch Performance Enterprise Data Center Design Considerations The Enterprise Data Center The Cisco Enterprise Data Center Architecture Framework Enterprise Data Center Infrastructure Data Center Access Layer Data Center Aggregation Layer Data Center Core Layer Density and Scalability of Servers Summary References Case Study: ACMC Hospital Network Campus Design Case Study Additional Information Case Study Questions Review Questions Chapter 5 Designing Remote Connectivity Enterprise Edge WAN Technologies Introduction to WANs WAN Interconnections Traditional WAN Technologies Packet-Switched Network Topologies WAN Transport Technologies TDM (Leased Lines) ISDN Frame Relay Asynchronous Transfer Mode MPLS Metro Ethernet DSL Technologies Cable Technology Wireless Technologies Synchronous Optical Network and Synchronous Digital Hierarchy Dense Wavelength Division Multiplexing Dark Fiber WAN Transport Technology Pricing and Contract Considerations WAN Design Application Requirements of WAN Design Response Time Throughput Packet Loss Reliability Technical Requirements: Maximum Offered Traffic Technical Requirements: Bandwidth Eval.