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    1. Data och IT
    2. Nätverk och kommunikation

    Art of Network Architecture, The

    Business-Driven Design

    AvRuss White,Denise Donohue

    Häftad, Engelska, 2014

    Del i serien Networking Technology

    501 kr

    Beställningsvara. Skickas inom 7-10 vardagar. Fri frakt över 249 kr.

    Beskrivning

    The Art of Network Architecture

    Business-Driven Design

    The business-centered, business-driven guide to architecting and evolving networks

    The Art of Network Architecture is the first book that places business needs and capabilities at the center of the process of architecting and evolving networks. Two leading enterprise network architects help you craft solutions that are fully aligned with business strategy, smoothly accommodate change, and maximize future flexibility.

    Russ White and Denise Donohue guide network designers in asking and answering the crucial questions that lead to elegant, high-value solutions. Carefully blending business and technical concerns, they show how to optimize all network interactions involving flow, time, and people.

    The authors review important links between business requirements and network design, helping you capture the information you need to design effectively. They introduce today’s most useful models and frameworks, fully addressing modularity, resilience, security, and management. Next, they drill down into network structure and topology, covering virtualization, overlays, modern routing choices, and highly complex network environments.

    In the final section, the authors integrate all these ideas to consider four realistic design challenges: user mobility, cloud services, Software Defined Networking (SDN), and today’s radically new data center environments.

    • Understand how your choices of technologies and design paradigms will impact your business

    • Customize designs to improve workflows, support BYOD, and ensure business continuity

    • Use modularity, simplicity, and network management to prepare for rapid change

    • Build resilience by addressing human factors and redundancy

    • Design for security, hardening networks without making them brittle

    • Minimize network management pain, and maximize gain

    • Compare topologies and their tradeoffs

    • Consider the implications of network virtualization, and walk through an MPLS-based L3VPN example

    • Choose routing protocols in the context of business and IT requirements

    • Maximize mobility via ILNP, LISP, Mobile IP, host routing, MANET, and/or DDNS

    • Learn about the challenges of removing and changing services hosted in cloud environments

    • Understand the opportunities and risks presented by SDNs

    • Effectively design data center control planes and topologies

    Produktinformation

    • Utgivningsdatum:2014-04-24
    • Mått:100 x 100 x 100 mm
    • Vikt:100 g
    • Format:Häftad
    • Språk:Engelska
    • Serie:Networking Technology
    • Antal sidor:352
    • Upplaga:1
    • Förlag:Pearson Education
    • ISBN:9781587143755

    Utforska kategorier

    • Nätverk och kommunikation inom Data och IT
    • It-certifieringar inom Data och IT

    Mer om författaren

    Russ White, CCIE No. 2635, is a principal engineer in the IPOS team at Ericsson. He has worked in routing protocols and routed network design for the past 15 years. Russ has spoken at Cisco Live, Interop, LACNOG, and other global industry venues. He is actively involved in the IETF and the ISOC, has co-authored more than 30 software patents in the area of network protocols, and has co-authored nine books in the area of network protocols, design, and architecture. He holds a Master of Information Technology in Network Design and Architecture from Capella University and a Master of Christian Ministry in Christian literature from Shepherds Theological Seminary.Denise Donohue, CCIE No. 9566 (Routing and Switching), is a senior solutions architect with Chesapeake NetCraftsmen. Denise has worked with computer systems since the mid-1990s, focusing on network design since 2004. During that time she has designed for a wide range of networks, private and public, of all sizes, across most industries. Denise has also authored or co-authored many Cisco Press books covering data and voice networking technologies and spoken at Cisco Live and other industry events.

    Innehållsförteckning

    • Introduction xxPart I Framing the ProblemChapter 1 Business and Technology 1Business Drives Technology 2The Business Environment 2The Big Picture 3The Competition 4The Business Side of the Network 5Technologies and Applications 5Network Evaluation 6The Network’s Customers 6Internal Users 7External Users 8Guest Users 9Technology Drives Business 9Part II Business-Driven DesignChapter 2 Designing for Change 11Organic Growth and Decline 12Mergers, Acquisitions, and Divestments 14Centralizing Versus Decentralizing 15Chapter 3 Improving Business Operations 19Workflow 19Matching Data Flow and Network Design 20Person-to-Person Communication 21Person-to-Machine Communication 21Machine-to-Machine Communication 22Bringing It All Together 23BYOD 24BYOD Options 24BYOD Design Considerations 27BYOD Policy 28Business Continuity 29Business Continuity Versus Disaster Recovery 29Business Continuity Planning 30Business Continuity Design Considerations 31Summary 33Part III Tools of the TradeChapter 4 Models 35The Seven-Layer Model 36Problems with the Seven-Layer Model 38The Four-Layer Model 38Iterative Layering Model 39Connection-Oriented and Connectionless 41A Hybrid Model 42The Control Plane 43What Am I Trying to Reach? 43Where Is It? 44How Do I Get There? 45Other Network Metadata 46Control Plane Relationships 46Routing 46Quality of Service 48Network Measurement and Management 49Interaction Between Control Planes 49Reactive and Proactive 51The Waterfall Model 53Places in the Network 54Summary 56Chapter 5 Underlying Support 57Questions You Should Ask 57What Happens When the Link Fails? 57What Types of Virtualization Can Be Run Over This Link? 58How Does the Link Support Quality of Service? 59Marking Packets 59Queues and Rate Limiters 59Speeds and Feeds Versus Quality of Service 60Spanning Tree 61TRILL 62TRILL Operation 62TRILL in the Design Landscape 64TRILL and the Fabrics 65Final Thoughts on the Physical Layer 65Chapter 6 Principles of Modularity 67Why Modularize? 68Machine Level Information Overload 68Machine Level Information Overload Defined 69Reducing Machine Information Level Overload 71Separating Complexity from Complexity 72Human Level Information Overload 73Clearly Assigned Functionality 74Repeatable Configurations 75Mean Time to Repair and Modularization 75How Do You Modularize? 77Topology and Reachability 77Aggregating Topology Information at Router B 78Aggregating Reachability Information at Router B 78Filtering Routing Information at Router B 79Splitting Failure Domains Horizontally and Vertically 79Modularization and Optimization 81Summary 82Chapter 7 Applying Modularity 83What Is Hierarchical Design? 83A Hub-and-Spoke Design Pattern 84An Architectural Methodology 85Assign Each Module One Function 85All Modules at a Given Level Should Share Common Functionality 86Build Solid Redundancy at the Intermodule Level 87Hide Information at Module Edges 88Typical Hierarchical Design Patterns 89Virtualization 90What Is Virtualization? 90Virtualization as Vertical Hierarchy 93Why We Virtualize 93Communities of Interest 94Network Desegmentation 94Separation of Failure Domains 94Consequences of Network Virtualization 95Final Thoughts on Applying Modularity 96Chapter 8 Weathering Storms 97Redundancy as Resilience 98Network Availability Basics 98Adding Redundancy 99MTTR, Resilience, and Redundancy 100Limits on Control Plane Convergence 100Feedback Loops 102The Interaction Between MTTR and Redundancy 103Fast Convergence Techniques 104Detecting the Topology Change 104Propagating Information About the Change 105Calculating the New Best Path 106Switching to the New Best Path 107The Impact of Fast Convergence 107Fast Reroute 108P/Q Space 109Loop-Free Alternates 110Remote Loop-Free Alternates 110Not-Via Fast Reroute 111Maximally Redundant Trees 113Final Thoughts on Fast Reroute 115The Human Side of Resilience 115Chapter 9 Securing the Premises 117The OODA Loop 118Observe 119Orient 122Decide 124Act 125Brittleness 125Building Defense In 126Modularization 128Modularity, Failure Domains, and Security 128Modularity, Complexity, and Security 128Modularity, Functionality, and Security 129Resilience 129Some Practical Considerations 129Close a Door, Open a Door 129Beware of Virtualization 131Social Engineering 131Summary 132Chapter 10 Measure Twice 133Why Manage? 133Justifying the Cost of the Network 134Planning 135Decreasing the Mean Time to Repair 136Increasing the Mean Time Between Mistakes 136Management Models 137Fault, Configuration, Accounting, Performance, and Security 137Observe, Orient, Decide, and Act (OODA) 138Deploying Management 140Loosen the Connection Between Collection and Management 140Sampling Considerations 141Where and What 142End-to-End/Network 142Interface/Transport 143Failure Domain/Control Plane 143Bare Necessities 144Summary 145Part IV Choosing MaterialsChapter 11 The Floor Plan 147Rings 147Scaling Characteristics 147Resilience Characteristics 149Convergence Characteristics 151Generalizing Ring Convergence 154Final Thoughts on Ring Topologies 155Full Mesh 155Clos Networks 157Clos and the Control Plane 159Clos and Capacity Planning 160Partial Mesh 161Disjoint Parallel Planes 162Advantages of Disjoint Topologies 163Added Complexity 164The Bottom Line 164Divergent Data Planes 165Cubes 166Toroid Topologies 167Summary 169Chapter 12 Building the Second Floor 171What Is a Tunnel? 171Is MPLS Tunneling? 173Fundamental Virtualization Questions 175Data Plane Interaction 176Control Plane Considerations 177Control Plane Interaction 177Scaling 178Multicast 179Security in a Virtual Topology 180MPLS-Based L3VPNs 182Operational Overview 182Fundamental Questions 185The Maximum Transmission Unit 185Quality of Service 186Control Plane Interaction 186Scaling 187Multicast 188Security in MPLS-Based L3VPNs 188MPLS-Based L3VPN Summary 188VXLAN 189Operational Overview 189Fundamental Questions 190Control Plane Interaction 190Scaling 190VXLAN Summary 191Summary 191Chapter 13 Routing Choices 193Which Routing Protocol? 194How Fast Does the Routing Protocol Converge? 194Is the Routing Protocol Proprietary? 196How Easy Is the Routing Protocol to Configure and Troubleshoot? 197Which Protocol Degrades in a Way That Works with the Business? 198Which Protocol Works Best on the Topology the Business Usually Builds? 199Which Protocol is Right? 200IPv6 Considerations 202What Is the Shape of the Deployment? 202How Does Your Deployment Grow? 202Topological Deployment 203Virtual Topology Deployment 203Where Are the Policy Edges? 203Routing Protocol Interaction with IPv6 204IS-IS Interaction with IPv6 204OSPF Interaction with IPv6 205EIGRP Interaction with IPv6 206Deploying BGP 206Why Deploy BGP? 207Complexity of Purpose 207Complexity of Place 208Complexity of Policy 208BGP Deployment Models 209iBGP Edge-to-Edge (Overlay Model) 209iBGP Core 210eBGP Edge-to-Edge (Core and Aggregation Model) 211Summary 212Chapter 14 Considering Complexity 213Control Plane State 213Concepts of Control Plane State 214Network Stretch 215Configuration State 217Control Plane Policy Dispersion 218Data Plane State 220Reaction Time 223Managing Complexity Trade-offs 225Part V Current and Future TrendsChapter 15 Network in Motion 227The Business Case for Mobility 228A Campus Bus Service 228A Mobile Retail Analysis Team 229Shifting Load 230Pinning the Hard Problems into Place 230Mobility Requires State 231Mobility Requires Speed 231State Must Be Topologically Located 232State and the Network Layers 233IP-Centric Mobility Solutions 234Identifier-Locator Network Protocol (ILNP) 235Locator Identifier Separation Protocol (LISP) 237Mobile IP 238Host Routing 239Mobile Ad-Hoc Networks (MANET) 240Dynamic DNS 242Final Thoughts on Mobility Solutions 243Remote Access Solutions 244Separate Network Access from Application Access 244Consider Cloud-Based Solutions 245Keep Flexibility as a Goal 246Consider Total Cost 248Consider Making Remote Access the Norm 248What Solution Should You Deliver? 249Chapter 16 On Psychologists, Unicorns, and Clouds 251A Cloudy History 252This Time It’s Different 254What Does It Cost? 255What Are the Risks? 256What Problems Can Cloud Solve Well? 257What Services Is Cloud Good at Providing? 258Storage 258Content Distribution 259Database Services 260Application Services 260Network Services 260Deploying Cloud 261How Hard Is Undoing the Deployment? 261How Will the Service Connect to My Network? 261How Does Security Work? 262Systemic Interactions 262Flying Through the Cloud 262Components 263Looking Back Over the Clouds 264Chapter 17 Software-Defined Networks 265Understanding SDNs 265A Proposed Definition 265A Proposed Framework 266The Distributed Model 267The Augmented Model 268The Hybrid Model 269The Replace Model 271Offline Routing/Online Reaction 272OpenFlow 274Objections and Considerations 276Conclusion 281Software-Defined Network Use Cases 281SDNs in a Data Center 281What OpenFlow Brings to the Table 281Challenges to the OpenFlow Solution 283SDNs in a Wide-Area Core 283Final Thoughts on SDNs 285Chapter 18 Data Center Design 287Data Center Spine and Leaf Fabrics 287Understanding Spine and Leaf 288The Border Leaf 291Sizing a Spine and Leaf Fabric 291Speed of the Fabric 291Number of Edge Ports 292Total Fabric Bandwidth 293Why No Oversubscription? 294The Control Plane Conundrum 295Why Not Layer 2 Alone? 295Where Should Layer 3 Go? 296Software-Defined Networks as a Potential Solution 298Network Virtualization in the Data Center 299Thoughts on Storage 299Modularity and the Data Center 300Summary 3019781587143755 TOC 3/12/2014