OSPF Complete Implementation

OSPF Complete Implementation

by John Moy

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Product Details

ISBN-13: 9780133757507
Publisher: Pearson Education
Publication date: 09/28/2000
Sold by: Barnes & Noble
Format: NOOK Book
File size: 19 MB
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About the Author

John T. Moy is a Corporate Fellow at Sycamore Networks, Inc. He is the author of the OSPF and MOSPF protocol specifications and chairs the OSPF and MOSPF Working Groups in the Internet Engineering Task Force. Involved in the design and development of router software for nearly two decades, Moy previously worked at Ascend Communications, Proteon, and Bolt, Beranek and Newman. He holds an M.A. in mathematics from Princeton and a B.S. in mathematics from the University of Minnesota.

Table of Contents

List of Tables.

List of Figures.


1. Functional Specifications.

Feature Set.

Implementation Mechanics.

An OSPF Routing Daemon: OSPFD.

An OSPF Routing Simulator.


2. Installation Instructions.

Installation of OSPFD (Linux Only).

Installation of the OSPF Routing Simulator: OSPF_SIM.

Installing the OSPF Sources.

3. Software Architecture.

Data Flow.

Major Data Structures.

File Organization.

4. Porting Guide.

Porting Overview.

System Interface.

Application Programming Interface.

Porting Considerations.

5. Building Blocks.

6. The Link-State Database.

Link-State Database Fundamentals.

Database Operations.

LSA Lists.

Aging LSAs.

DoNotAge LSAs.

7. Originating LSAs.

Support Routines.


Network-LSAs: SpfIfc::nl_orig().

Receiving Self-Originated LSAs.

Deferred Originations.

Refreshing LSAs.

LS Sequence Number Rollover.

Premature Aging.

8. Neighbor Maintenance.

Neighbor State Machine.

Neighbor Discovery.

Database Exchange.

Interface State Changes.

9. Flooding.

Data Structures.

Receiving Link State Updates: SpfNbr::recv_update().

Flooding LSAs: LSA::flood().

Receiving Acknowledgments: SpfNbr::recv_ack().

Retransmitting LSAs: SpfNbr::rxmt_update().

Building Update Packets.

10. OSPF Hierarchy.

Guidelines for Area Boundaries.

Implementing Area Routing.

Implementing External Routing.

11. Routing Calculations.

Triggering the Routing Calculation: OSPF::rtsched().

The Intra-AS Routing Calculation: OSPF::full_calculation().

Multipath Calculations.

Preprocessing LSAs.

Routes to ASBRs.

External Routes: INrte::run_external().

12. MOSPF Implementation.

MOSPF Data Structures.

IGMPv2 Implementation.

Propagating Group Membership: Group-Membership-LSAs.

Routing Calculations.

Cache Maintenance and MOSPF IGMP Interaction.

Interaction with Other Routing Protocols.

13. Configuration and Monitoring.

Global Parameters.

Interface Parameters.

Cryptographic Authentication Keys.

Area Parameters.

Area Route Aggregation.

Virtual Link Parameters.

Nonbroadcast Neighbors.

Loopback Addresses and Attached Hosts.

External Routes.

Graceful Exit.

Rereading Entire Configuration.

Host Wiretapping.

Monitor Interface.

14. A Routing Daemon for Linux.

The OSPFD Configuration.

Changing Configuration Syntax.

Dynamic Reconfiguration.

Graceful Shutdown.

Monitoring OSPFD Operation.


Implementation Details.

15. An OSPF Simulator.

Software Architecture.

The Simulation Controller Process: OSPF_SIM.

A Simulated OSPF Router: The OSPFD_SIM Process.

Monitoring and Debugging.

Appendix A. Manual Pages.

Appendix B. OSPFD Logging Messages.

Configuration and Management Messages.

Error Messages.

Informational Messages.

Halt Messages.

Appendix C. Projects.

Appendix D. GNU General Public License.



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