| Preface | p. xvi |
| Acknowledgments | p. xviii |
| Principles of Network Design | p. 1 |
| Design Objectives | p. 2 |
| Performance | p. 2 |
| Redundancy and Resilience | p. 4 |
| Accommodating Growth and Change | p. 5 |
| Management and Manageability | p. 6 |
| Security | p. 7 |
| Disaster Recovery | p. 7 |
| Cost | p. 7 |
| Understanding the Networking Environment | p. 8 |
| Network Applications | p. 9 |
| The Cost of Downtime | p. 10 |
| Achieving the Design Goals | p. 10 |
| The Importance of Being Predictable | p. 12 |
| Fundamental Design Principles | p. 13 |
| Designing the Wide Area Network (WAN) | p. 17 |
| Designing a Wide Area Network (WAN) Topology | p. 18 |
| Flat Versus Hierarchical | p. 18 |
| Flat WAN Topology | p. 20 |
| Advantages of a Flat WAN Structure | p. 23 |
| Limitations of a Flat Design | p. 25 |
| Routing Protocol Limitations | p. 25 |
| Conclusion | p. 31 |
| Hierarchical | p. 31 |
| PVC and Leased Line Aggregation | p. 32 |
| Cost-effective Bandwidth Deployment | p. 33 |
| Shorter Leased Line Distances | p. 34 |
| Reduced Core Router Ports or Interfaces | p. 35 |
| Less Routing Protocol Neighbors | p. 35 |
| Route Summarization | p. 35 |
| Broadcast Control in the WAN | p. 37 |
| Disaster Recovery | p. 37 |
| Issues with a Hierarchical Design | p. 37 |
| WAN Costs | p. 37 |
| Additional Router Hops | p. 38 |
| Conclusion | p. 41 |
| The Hierarchical Layers | p. 41 |
| The Tier-3 Layer | p. 41 |
| The Tier-2 Layer | p. 44 |
| The Backbone: Tier-1 | p. 47 |
| WAN Design Parameters | p. 52 |
| Cost | p. 52 |
| Availability and Performance | p. 53 |
| Redundancy and Resilience | p. 55 |
| How Real Is the Resilience? | p. 57 |
| Choosing the WAN Technology | p. 59 |
| Design Considerations for Serial Links | p. 60 |
| Designing IP over Frame Relay | p. 64 |
| Broadcasting over Frame Relay | p. 64 |
| Using Sub-Interfaces in an IP Environment | p. 65 |
| PVC Meshing and IP Redundancy | p. 68 |
| Dynamic Routing over Frame Relay | p. 72 |
| Frame Relay Traffic Management | p. 76 |
| Private Frame Relay | p. 78 |
| ISDN Design Issues with IP | p. 79 |
| IP Routing over ISDN | p. 79 |
| Using ISDN for Redundancy | p. 82 |
| PPP and Multilink PPP | p. 86 |
| Designing IP over ATM | p. 87 |
| Benefits of ATM | p. 88 |
| ATM Design Issues | p. 89 |
| Private ATM | p. 97 |
| Voice and Data Integration | p. 98 |
| Fundamental IP Routing Design | p. 107 |
| Designing an IP Addressing Plan | p. 108 |
| Choice of Major Network Addresses | p. 108 |
| Subnet Planning | p. 109 |
| VLSM | p. 111 |
| Planning for Route Summarization | p. 114 |
| Categorizing IP Routing Protocols | p. 122 |
| Distance Vector and Link State Protocols | p. 122 |
| Classful and Classless Routing | p. 123 |
| Classful Route Advertisements and Summarization | p. 124 |
| Choosing a Routing Protocol | p. 125 |
| Scalability | p. 126 |
| Routing Updates | p. 126 |
| Routing Protocol Stability | p. 127 |
| Speed of Convergence | p. 130 |
| Routing Metric | p. 133 |
| Support of VLSM | p. 135 |
| Discontiguous Networks | p. 135 |
| Route Summarization | p. 136 |
| Understanding Load Balancing | p. 141 |
| Security | p. 142 |
| When To Use Static Routes | p. 143 |
| Routing Information Protocol | p. 145 |
| RIP Version 1 | p. 145 |
| RIP Version 2 | p. 146 |
| RIP Convergence | p. 147 |
| Scalable IP Routing I-OSPF | p. 151 |
| Open Shortest Path First (OSPF) | p. 152 |
| Why Use OSPF7 | p. 152 |
| How OSPF Operates | p. 154 |
| Link State Advertisements (LSAs) | p. 155 |
| Neighbor and Adjacency Formation | p. 159 |
| SPF Algorithm | p. 161 |
| OSPF Convergence | p. 163 |
| OSPF Network Types | p. 164 |
| Broadcast Networks and Designated Routers | p. 165 |
| Point-to-Point Networks | p. 168 |
| Non-broadcast Networks | p. 168 |
| Point-to-Multipoint Networks | p. 171 |
| Designing Within the Hierarchical Structure | p. 172 |
| Rules for the OSPF Area Structure | p. 174 |
| Scaling Limitations for OSPF Areas | p. 179 |
| OSPF Routers | p. 181 |
| Stub Areas | p. 188 |
| Totally Stubby Areas | p. 190 |
| Not-So-Stubby Areas (NSSA) | p. 190 |
| Virtual Links | p. 193 |
| Variable-Length Subnet Masking (VLSM) | p. 197 |
| Route Summarization in OSPF | p. 198 |
| How OSPF Summarizes | p. 199 |
| OSPF and ISDN | p. 202 |
| OSPF Demand Circuit | p. 202 |
| Conclusion | p. 205 |
| Scalable IP Routing II- EIGRP and Protocol Redistribution | p. 207 |
| EIGRP Operational Characteristics | p. 208 |
| Protocol Overview | p. 208 |
| EIGRP Concepts and Operation | p. 210 |
| EIGRP Convergence | p. 218 |
| Convergence and DUAL | p. 218 |
| Convergence Problems with EIGRP | p. 219 |
| Load Balancing with EIGRP | p. 225 |
| VLSM | p. 227 |
| Route Summarization | p. 228 |
| The Automatic Summarization Myth | p. 229 |
| The Power of Manual Route Summarization | p. 230 |
| EIGRP over NBMA Networks | p. 233 |
| PVC Bandwidth Allocation | p. 234 |
| EIGRP in a Multiprotocol Environment | p. 236 |
| Protocol Redistribution | p. 236 |
| Preventing Routing Loops | p. 238 |
| Route Determination | p. 239 |
| Migrating from IGRP | p. 243 |
| Migration Strategy | p. 244 |
| Issues Worth Noting | p. 245 |
| A Case Study in EIGRP Migration | p. 246 |
| EIGRP and OSPF: Comparison Summary | p. 248 |
| Complexity of Operation | p. 248 |
| Design Restrictions | p. 248 |
| Ease of Configuration | p. 249 |
| Scalability | p. 249 |
| Convergence | p. 249 |
| Route Summarization | p. 250 |
| VLSM | p. 250 |
| Proprietary | p. 250 |
| Misconceptions in the Marketplace | p. 251 |
| Conclusion | p. 252 |
| BGP and Internet Routing | p. 253 |
| BGP Operation and Characteristics | p. 254 |
| BGP Overview | p. 254 |
| Fundamental Internet Architecture | p. 256 |
| When Is BGP the Correct Option? | p. 257 |
| EBGP and IBGP | p. 259 |
| Synchronization | p. 261 |
| BGP Stability - Problems and Solutions | p. 263 |
| IGP Redistribution into BGP | p. 265 |
| BGP Redistribution into IGP | p. 266 |
| BGP Path Selection and Manipulation | p. 270 |
| BGP Attributes | p. 270 |
| BGP Route Selection | p. 278 |
| BGP Filtering | p. 278 |
| Attribute Manipulation and Policy-Based Routing | p. 281 |
| Policy Based Routing Examples | p. 282 |
| BGP Resilience and Redundancy | p. 285 |
| Default Routes to Each ISP | p. 285 |
| Default Routes in Tandem with BGP | p. 287 |
| Receiving Full BGP Routes | p. 289 |
| Scalable AS Routing | p. 290 |
| Route Aggregation | p. 290 |
| Route Reflectors | p. 292 |
| Route Reflector Design and Migration Issues | p. 296 |
| BGP Confederations and Private AS | p. 297 |
| Peer Groups Within BGP | p. 299 |
| Designing the LAN I-The Campus | p. 301 |
| Campus Network Design Goals | p. 302 |
| Performance Parameters | p. 302 |
| Diversity of Applications and QOS | p. 303 |
| Effective Resilience | p. 304 |
| Scalability | p. 309 |
| Understanding the Campus Network | p. 310 |
| Client-Server Traffic Flow | p. 310 |
| To Switch or Not To Switch? | p. 310 |
| Designing a LAN Topology | p. 321 |
| Segmentation Using Routing | p. 321 |
| Segmentation Using Switching | p. 325 |
| The Importance of Layer 3 Switching | p. 330 |
| Campus Hierarchical Design | p. 335 |
| Access Layer | p. 336 |
| Intermediate Layer | p. 337 |
| Campus Backbone | p. 343 |
| Collapsed Backbone versus Distributed | p. 348 |
| Routed Backbone versus Switched | p. 350 |
| Sample Campus Topology | p. 358 |
| Designing the LAN II - VLANs, Multicasting, and QoS | p. 361 |
| VLAN Planning | p. 362 |
| Why Implement VLANs? | p. 362 |
| The Physical Scope of VLANs | p. 365 |
| VLAN Management | p. 367 |
| VLAN Trunking | p. 368 |
| VLAN Gateways and Resilience | p. 370 |
| Spanning Tree Protocol (STP) | p. 378 |
| Spanning Tree Refresher | p. 378 |
| Fundamental Design Issues | p. 383 |
| Optimizing STP | p. 390 |
| STP and Port Aggregation | p. 394 |
| IP Multicasting | p. 396 |
| The Significance of Multicasting | p. 396 |
| An Overview of IP Multicasting | p. 399 |
| QoS and RSVP | p. 422 |
| RSVP Overview | p. 423 |
| RSVP Operation | p. 424 |
| Design and Implementation Considerations | p. 431 |
| Network Security | p. 435 |
| Developing a Security Strategy | p. 436 |
| Productivity Versus Protection | p. 436 |
| Elements of Information Protection | p. 437 |
| Risk and Vulnerability Assessment | p. 438 |
| Developing a Security Policy | p. 440 |
| Security Tools | p. 441 |
| Packet Filtering | p. 442 |
| Encryption | p. 449 |
| Virtual Private Networks (VPNs) | p. 453 |
| Intrusion Detection Systems (IDSs) | p. 454 |
| Password Management | p. 456 |
| Security Servers | p. 457 |
| IPv6 and IPSec | p. 458 |
| Firewalls | p. 461 |
| Firewall Functions | p. 461 |
| Firewall Architecture | p. 464 |
| Firewall Policies | p. 467 |
| Security Design and Implementation | p. 476 |
| Device Security | p. 476 |
| Network Security | p. 477 |
| Protection Against Common IP Threats | p. 479 |
| Table of Contents provided by Syndetics. All Rights Reserved. |
