| Acknowledgments | p. x |
| Introduction | p. xi |
| Router Basics | p. 1 |
| Objectives | p. 2 |
| Router Concepts | p. 2 |
| Routers Compared to Bridges | p. 5 |
| Routers Compared to Other Computers | p. 7 |
| Getting to Know Your Router | p. 9 |
| Connecting a Terminal to a Cisco Router | p. 9 |
| The Cisco User Interface | p. 10 |
| Summary | p. 14 |
| TCP/IP Communications | p. 15 |
| Objectives | p. 16 |
| What Is TCP/IP? | p. 16 |
| The OSI Data Communications Model | p. 17 |
| Department of Defense Model | p. 21 |
| TCP/IP Addressing | p. 29 |
| Application Layer Addressing | p. 30 |
| Internet Layer Addressing | p. 32 |
| Network Access Layer Addressing | p. 37 |
| Putting It All Together | p. 40 |
| Summary | p. 40 |
| Configuring Cisco Routers | p. 43 |
| Objectives | p. 44 |
| Sources for Configuring a Router | p. 44 |
| Configuring a Router Manually | p. 44 |
| Configuring a Router from a Network Server | p. 53 |
| Configuring a Router Using Auto-Install | p. 56 |
| Setting Up a Lab | p. 58 |
| Lab Exercises | p. 77 |
| Overview of Physical Layer Troubleshooting | p. 77 |
| Overview of Data Link Layer Troubleshooting | p. 78 |
| Overview of Network Layer Troubleshooting | p. 79 |
| Summary | p. 79 |
| Routing Protocols Used in TCP/IP | p. 81 |
| Objectives | p. 82 |
| Routing Protocol Responsibilities | p. 82 |
| Interior Gateway Protocols: Distance Vector | p. 84 |
| Generic Distance Vector | p. 84 |
| RIP: The Routing Information Protocol | p. 85 |
| IGRP: Interior Gateway Routing Protocol | p. 95 |
| EIGRP: The Hybrid Protocol | p. 104 |
| Inside EIGRP | p. 106 |
| Configuring EIGRP | p. 107 |
| Routing Protocols: Link State | p. 109 |
| OSPF: Open Shortest Path First | p. 110 |
| Integrated IS-IS | p. 120 |
| Exterior Gateway Routing Protocols | p. 121 |
| Static Routing | p. 121 |
| Exterior Gateway Protocol | p. 122 |
| BGP: Border Gateway Protocol | p. 123 |
| Redistributing Route Information between Protocols | p. 125 |
| Redistributing between RIP and OSPF | p. 126 |
| Routing between Autonomous Systems | p. 132 |
| IP Version 6 | p. 136 |
| Background | p. 136 |
| Technical Overview | p. 137 |
| How IPv6 Headers Work | p. 140 |
| IPv6 Address Routing | p. 141 |
| Unicast Addresses | p. 142 |
| Multicast and Anycast addresses | p. 143 |
| Inter and Intra domain Routing | p. 144 |
| Neighbor Discovery | p. 145 |
| The Transition from IPv4 to IPv6 | p. 147 |
| IPv6 Security | p. 148 |
| IPv6 over Different Link Level Topologies | p. 149 |
| Summary | p. 153 |
| Adding Support for Legacy LANs | p. 155 |
| Objectives | p. 156 |
| Novell NetWare's IPX/SPX Protocols | p. 156 |
| Overview of IPX and SPX | p. 157 |
| NetWare Client-to-Server Communication | p. 159 |
| Configuring Basic IPX Routing | p. 161 |
| Viewing Potential Problems | p. 163 |
| Optimizing IPX Routing and Service Advertising | p. 165 |
| Optimizing Periodic NetWare Maintenance Traffic | p. 169 |
| Configuring EIGRP for IPX | p. 172 |
| The Basics of NLSP and IPXWAN Operation | p. 175 |
| NetBIOS over IPX | p. 181 |
| Bridging Nonroutable Protocols | p. 183 |
| Transparent Bridges | p. 184 |
| Source Routing Bridges | p. 188 |
| Source Route Transparent Bridging | p. 192 |
| IBM Networking | p. 193 |
| Overview of IBM Technology | p. 194 |
| Cisco's Approach to IBM Technology Integration | p. 196 |
| Networking Windows NT | p. 205 |
| Windows NT Network Protocols | p. 205 |
| Windows NT Network Traffic | p. 207 |
| Transporting Windows NT Traffic over a WAN | p. 209 |
| Implementing Quality of Service Features | p. 214 |
| Background Considerations | p. 215 |
| RSVP, RTP and IP Multicast | p. 216 |
| Implementation Issues | p. 218 |
| Summary | p. 219 |
| Supporting Popular WAN Technologies | p. 221 |
| Objectives | p. 222 |
| Frame Relay | p. 222 |
| Frame Relay Terms | p. 226 |
| Configuring Frame Relay Features | p. 227 |
| Configuring a Test Frame Relay Network | p. 233 |
| SMDS: Switched Multimegabit Data Service | p. 236 |
| SMDS Protocols | p. 237 |
| Configuring SMDS | p. 239 |
| X.25 | p. 240 |
| X.25 Basics | p. 241 |
| Configuring an X.25 Network Connection | p. 244 |
| Viewing X.25 Connection Status | p. 251 |
| Customizing X.25 Parameters | p. 252 |
| Point-to-Point Protocols | p. 254 |
| SLIP Communications | p. 254 |
| PPP Communications | p. 255 |
| SDLC | p. 263 |
| ISDN | p. 265 |
| Additional WAN Technologies | p. 277 |
| Cisco Serial Interfaces | p. 277 |
| Line Types | p. 280 |
| Summary | p. 283 |
| Building a TCP/IP Router-Based Network | p. 285 |
| Objectives | p. 286 |
| The Base Internetwork | p. 286 |
| IANA or Not IANA? | p. 287 |
| Internetwork Topology | p. 290 |
| Backbone Topologies | p. 291 |
| Distribution Center Topologies | p. 295 |
| Head Office and Remote Site Topologies | p. 298 |
| Designing Physical Network Layout | p. 300 |
| Reducing Manual Configuration | p. 301 |
| RARP: Reverse Address Resolution Protocol | p. 301 |
| DHCP: Dynamic Host Configuration Protocol | p. 302 |
| Centrally Managing Host Names | p. 303 |
| Integrating the Operation of DNS and DHCP | p. 306 |
| CDDM Systems Components | p. 306 |
| The Specific of CDDM Operation | p. 307 |
| Supporting Multiple Logical Networks on the same Physical Link | p. 310 |
| Creating a New Domain | p. 311 |
| Securing a TCP/IP Internetwork | p. 313 |
| Application Layer Measures | p. 313 |
| Packet-Level Security | p. 317 |
| Cisco's PIX Firewall | p. 335 |
| Physical Layer Security | p. 341 |
| IP Unnumbered and Data Compression | p. 342 |
| IP Unnumbered | p. 342 |
| Data Compression | p. 345 |
| Overview of Managing an Internetwork | p. 349 |
| SNMP System Components | p. 349 |
| Systems Management Objectives | p. 351 |
| Sample Router Configuration for SNMP Management | p. 352 |
| Overview of Managing an Internetwork with CiscoWorks | p. 354 |
| Remotely Upgrading Router IOS from a TFTP Server | p. 357 |
| Overview of Cisco Router Password Recovery Procedures | p. 363 |
| Putting Together the Sample Internetwork | p. 365 |
| Defining the Problem | p. 365 |
| The Central Site Configuration | p. 370 |
| Distribution Center Configuration | p. 372 |
| Remote Site Configuration | p. 373 |
| ISDN Backup and Asynchronous Dial-Up Service Configuration | p. 374 |
| Miscellaneous Issues | p. 375 |
| Summary | p. 377 |
| Troubleshooting | p. 379 |
| Objectives | p. 380 |
| A General Troubleshooting Blueprint | p. 380 |
| Troubleshooting the First Three ISO Layers | p. 382 |
| Simple Troubleshooting at the Physical Layer | p. 383 |
| Simple Data Link Layer Troubleshooting | p. 387 |
| Simple Troubleshooting at the Network Layer | p. 388 |
| Summary of a Simple Troubleshooting Process | p. 389 |
| Troubleshooting Interface Problems | p. 391 |
| Troubleshooting Serial Interfaces | p. 392 |
| Troubleshooting Asynchronous Communications | p. 405 |
| Troubleshooting Ethernet | p. 412 |
| Troubleshooting Token-Ring | p. 414 |
| Troubleshooting Protocol Problems | p. 417 |
| Troubleshooting Packet-Oriented WAN Protocols | p. 423 |
| Summary | p. 427 |
| Index | p. 429 |
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