OSPF for the Initiated
OSPF for the Initiated
Advanced topics for the CCIE Enterprise Infrastructure v1.1 Candidate
About the Book
OSPF for the Initiated is a book for the CCIE Enterprise Infrastructure candidate. It will thoroughly prepare you for the toughest questions and tasks on OSPF, and will help you understand OSPF at a new level.
About the Author
About the Contributors
Nicholas (Nick) Russo, CCDE™ #20160041 and CCIE™ #42518, holds active CCIE certifications in both Routing and Switching and Service Provider. Nick was among the first individuals to pass the CCIE Service Provider version 4 lab examination and this book represents his personal journey towards that end. Nick also holds a Bachelor’s of Science in Computer Science, and a minor in International Relations, from the Rochester Institute of Technology (RIT). Nick lives in Maryland, USA with his wife, Carla, and daughter, Olivia.
Developmental Editor
Artist | Digital Art
Table of Contents
-
- Acknowledgments
- Introduction
- Acronyms
-
1. OSPF Basics
- 1.1 Evolution
- 1.2 Principles of operation
- 1.3 The LSDB
- 1.4 OSPF messages
- 1.5 Basic configuration
- 1.6 OSPF Finite State Machine
- 1.7 References
-
2. LSA Types
- 2.1 LSA structure
- 2.2 LSDB synchronization
- 2.3 Router LSA
- 2.4 Network LSA
- 2.5 Summary LSAs
- 2.6 AS-external LSA
- 2.7 NSSA-external LSA
- 2.8 Opaque LSA (type 9, 10, 11 LSA)
- 2.9 LSA flooding
- 2.10 LSA MaxAge
- 2.11 Multi-area design considerations
-
3. OSPF Network Types
- 3.1 Point-to-Point
- 3.2 Broadcast
- 3.3 Point-to-multipoint
- 3.4 Point-to-multipoint non-broadcast
- 3.5 Non-broadcast multi-access (NBMA)
- 3.6 Virtual links
- 3.7 Loopback
- 3.8 OSPF DR/BDR Election
- 3.9 DR Preemption in DMVPN deployments (or the lack thereof)
- 3.10 OSPF over DMVPN
-
4. OSPF Stub Areas
- 4.1 Stub Areas
- 4.2 Totally Stubby Areas
- 4.3 Not-So-Stubby Areas
- 4.4 NSSA Totally Stub Areas
- 4.5 NSSA type-7 to type-5 Translator(s)
-
5. Path Selection
- 5.1 Introduction
- 5.2 OSPF RIB
- 5.3 Cost
- 5.4 Intra-area path selection
- 5.5 Inter-area path selection
- 5.6 Virtual links
- 5.7 Transit areas
- 5.8 Hot potato versus cold potato routing
- 5.9 External destinations
- 5.10 RFC 1583 Compatibility
-
6. Summarization in OSPF
- 6.1 Internal Summarization
- 6.2 Summarization of redistributed prefixes (external summarization)
- 6.3 Summarization example 2
- 6.4 Path selection with summarization
- 6.5 Discard Routes
-
7. Filtering in OSPF
- 7.1 Distribute Lists
- 7.2 Administrative Distance
- 7.3 Filtering during summarization
- 7.4 Area filtering
- 7.5 Filtering redistributed routes at the ASBR
- 7.6 Filtering at the NSSA translator
- 7.7 Scalability filtering
- 7.8 LSDB Overload Protection
- 7.9 Transit Network prefix suppression
- 7.10 Database Filtering
- 7.11 References
-
8. Default Routing in OSPF
- 8.1 Default routing in stub areas
- 8.2 Default routing in NSSAs
- 8.3 Unconditional default routing
- 8.4 Default routing
- 8.5 Conditional default routing
- 8.6 Reliable Conditional Default Routing
-
9. OSPF Security
- 9.1 Overview of security mechanisms
- 9.2 OSPFv2 Authentication
- 9.3 OSPFv3 Security
- 9.4 TTL Security
-
10. OSPF Optimizations
- 10.1 Detection
- 10.2 Propagation
- 10.3 Process
- 10.4 RIB/FIB
- 10.5 Scalability in OSPF
- 10.6 Other OSPF optimizations
- 11. Further topics
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