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Introduction xxxiChapter 1 IPv4/IPv6 Addressing and Routing Review 2"Do I Know This Already?" Quiz 3Foundation Topics 7IPv4 Addressing 7DHCP for IPv4 11IPv6 Addressing 18IPv6 SLAAC, Stateful DHCPv6, and Stateless DHCPv6 22Packet-Forwarding Process 30Routing Information Sources 38Static Routes 41Trouble Tickets 47Exam Preparation Tasks 65Review All Key Topics 65Define Key Terms 66Command Reference to Check Your Memory 67Chapter 2 EIGRP 70"Do I Know This Already?" Quiz 70Foundation Topics 73EIGRP Fundamentals 73EIGRP Configuration Modes 78Path Metric Calculation 93References in This Chapter 102Exam Preparation Tasks 102Review All Key Topics 102Complete Tables and Lists from Memory 103Define Key Terms 103Use the Command Reference to Check Your Memory 103Chapter 3 Advanced EIGRP 106"Do I Know This Already?" Quiz 106Foundation Topics 108Failure Detection and Timers 108Route Summarization 113WAN Considerations 118Route Manipulation 128References in This Chapter 134Exam Preparation Tasks 135Review All Key Topics 135Complete Tables and Lists from Memory 135Define Key Terms 135Use the Command Reference to Check Your Memory 135Chapter 4 Troubleshooting EIGRP for IPv4 138"Do I Know This Already?" Quiz 138Foundation Topics 141Troubleshooting EIGRP for IPv4 Neighbor Adjacencies 141Troubleshooting EIGRP for IPv4 Routes 151Troubleshooting Miscellaneous EIGRP for IPv4 Issues 162EIGRP for IPv4 Trouble Tickets 169Exam Preparation Tasks 184Review All Key Topics 184Define Key Terms 185Use the Command Reference to Check Your Memory 185Chapter 5 EIGRPv6 188"Do I Know This Already?" Quiz 188Foundation Topics 190Troubleshooting EIGRPv6 Neighbor Issues 197Troubleshooting EIGRPv6 Routes 201Troubleshooting Named EIGRP 204EIGRPv6 and Named EIGRP Trouble Tickets 208Exam Preparation Tasks 218Review All Key Topics 218Define Key Terms 219Use the Command Reference to Check Your Memory 219Chapter 6 OSPF 222"Do I Know This Already?" Quiz 223Foundation Topics 225OSPF Fundamentals 225OSPF Configuration 232The Designated Router and Backup Designated Router 242OSPF Network Types 245Failure Detection 252Authentication 253References in This Chapter 255Exam Preparation Tasks 255Review All Key Topics 255Define Key Terms 256Use the Command Reference to Check Your Memory 256Chapter 7 Advanced OSPF 258"Do I Know This Already?" Quiz 258Foundation Topics 261Link-State Advertisements 261OSPF Stubby Areas 281OSPF Path Selection 292Summarization of Routes 295Discontiguous Network 302Virtual Links 303References in This Chapter 306Exam Preparation Tasks 306Review All Key Topics 307Define Key Terms 308Use the Command Reference to Check Your Memory 308Chapter 8 Troubleshooting OSPFv2 310"Do I Know This Already?" Quiz 310Foundation Topics 312Troubleshooting OSPFv2 Neighbor Adjacencies 312Troubleshooting OSPFv2 Routes 327Troubleshooting Miscellaneous OSPFv2 Issues 341OSPFv2 Trouble Tickets 348Exam Preparation Tasks 361Review All Key Topics 361Define Key Terms 362Use the Command Reference to Check Your Memory 362Chapter 9 OSPFv3 364"Do I Know This Already?" Quiz 364Foundation Topics 365OSPFv3 Fundamentals 365OSPFv3 Configuration 368OSPFv3 LSA Flooding Scope 378References in This Chapter 384Exam Preparation Tasks 384Review All Key Topics 384Define Key Terms 385Use the Command Reference to Check Your Memory 385Chapter 10 Troubleshooting OSPFv3 386"Do I Know This Already?" Quiz 386Foundation Topics 388Troubleshooting OSPFv3 for IPv6 388OSPFv3 Trouble Tickets 395Troubleshooting OSPFv3 Address Families 402OSPFv3 AF Trouble Ticket 412Exam Preparation Tasks 416Review All Key Topics 416Define Key Terms 417Use the Command Reference to Check Your Memory 417Chapter 11 BGP 420"Do I Know This Already?" Quiz 420Foundation Topics 422BGP Fundamentals 422Basic BGP Configuration 428Understanding BGP Session Types and Behaviors 441Multiprotocol BGP for IPv6 458References in This Chapter 470Exam Preparation Tasks 470Review All Key Topics 470Define Key Terms 471Use the Command Reference to Check Your Memory 471Chapter 12 Advanced BGP 474"Do I Know This Already?" Quiz 474Foundation Topics 476Route Summarization 476BGP Route Filtering and Manipulation 486BGP Communities 499Maximum Prefix 507Configuration Scalability 509References in This Chapter 511Exam Preparation Tasks 511Review All Key Topics 511Define Key Terms 512Use the Command Reference to Check Your Memory 512Chapter 13 BGP Path Selection 514"Do I Know This Already?" Quiz 515Foundation Topics 516Understanding BGP Path Selection 516BGP Best Path 517Weight 519BGP Equal-Cost Multipath 542Exam Preparation Tasks 543Review All Key Topics 543Define Key Terms 543Use the Command Reference to Check Your Memory 544Chapter 14 Troubleshooting BGP 546"Do I Know This Already?" Quiz 547Foundation Topics 549Troubleshooting BGP Neighbor Adjacencies 549Troubleshooting BGP Routes 562Troubleshooting BGP Path Selection 577Troubleshooting BGP for IPv6 583BGP Trouble Tickets 587MP-BGP Trouble Ticket 604Exam Preparation Tasks 607Review All Key Topics 607Define Key Terms 608Use the Command Reference to Check Your Memory 608Chapter 15 Route Maps and Conditional Forwarding 610"Do I Know This Already?" Quiz 610Foundation Topics 612Conditional Matching 612Route Maps 618Conditional Forwarding of Packets 623Trouble Tickets 628Exam Preparation Tasks 636Review All Key Topics 637Define Key Terms 637Use the Command Reference to Check Your Memory 637Chapter 16 Route Redistribution 640"Do I Know This Already?" Quiz 640Foundation Topics 641Redistribution Overview 641Reference in This Chapter 664Exam Preparation Tasks 665Review All Key Topics 665Define Key Terms 665Use the Command Reference to Check Your Memory 665Chapter 17 Troubleshooting Redistribution 668"Do I Know This Already?" Quiz 668Foundation Topics 671Troubleshooting Advanced Redistribution Issues 671Troubleshooting IPv4 and IPv6 Redistribution 680Redistribution Trouble Tickets 696Exam Preparation Tasks 715Review All Key Topics 715Define Key Terms 716Use the Command Reference to Check Your Memory 716Chapter 18 VRF, MPLS, and MPLS Layer 3 VPNs 718"Do I Know This Already?" Quiz 718Foundation Topics 720Implementing and Verifying VRF-Lite 720An Introduction to MPLS Operations 734An Introduction to MPLS Layer 3 VPNs 739Reference in This Chapter 745Exam Preparation Tasks 745Review All Key Topics 745Define Key Terms 746Use the Command Reference to Check Your Memory 746Chapter 19 DMVPN Tunnels 748"Do I Know This Already?" Quiz 748Foundation Topics 750Generic Routing Encapsulation (GRE) Tunnels 750Next Hop Resolution Protocol (NHRP) 756Dynamic Multipoint VPN (DMVPN) 758DMVPN Phase Comparison 760DMVPN Configuration 761Spoke-to-Spoke Communication 777Problems with Overlay Networks 788DMVPN Failure Detection and High Availability 792IPv6 DMVPN Configuration 793References in This Chapter 798Exam Preparation Tasks 799Review All Key Topics 799Define Key Terms 799Use the Command Reference to Check Your Memory 800Chapter 20 Securing DMVPN Tunnels 802"Do I Know This Already?" Quiz 802Foundation Topics 803Elements of Secure Transport 803IPsec Fundamentals 805IPsec Tunnel Protection 808References in This Chapter 820Exam Preparation Tasks 821Review All Key Topics 821Define Key Terms 821Use the Command Reference to Check Your Memory 821Chapter 21 Troubleshooting ACLs and Prefix Lists 824"Do I Know This Already?" Quiz 824Foundation Topics 827Troubleshooting IPv4 ACLs 827Troubleshooting IPv6 ACLs 830Troubleshooting Prefix Lists 833Trouble Tickets 836Exam Preparation Tasks 844Review All Key Topics 844Define Key Terms 845Use the Command Reference to Check Your Memory 845Chapter 22 Infrastructure Security 846"Do I Know This Already?" Quiz 846Foundation Topics 849Cisco IOS AAA Troubleshooting 849Troubleshooting Unicast Reverse Path Forwarding (uRPF) 852Troubleshooting Control Plane Policing (CoPP) 854IPv6 First-Hop Security 863Exam Preparation Tasks 864Review All Key Topics 865Define Key Terms 865Use the Command Reference to Check Your Memory 865Chapter 23 Device Management and Management Tools Troubleshooting 868"Do I Know This Already?" Quiz 868Foundation Topics 871Device Management Troubleshooting 871Management Tools Troubleshooting 878Exam Preparation Tasks 908Review All Key Topics 909Define Key Terms 910Use the Command Reference to Check Your Memory 910Chapter 24 Final Preparation 912Advice About the Exam Event 912Appendix A Answers to the "Do I Know This Already?" Quiz Questions 922Appendix B CCNP Enterprise Advanced Routing ENARSI 300-410 Official Certification Guide Exam Updates 932Glossary 934