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Network Sales and Services Handbook by Matthew J. Castelli

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Appendix G. EIGRP (Enhanced Interior Gateway Routing Protocol)

The following topics are covered in this appendix:

  • Neighbor Discovery and Recovery

  • Reliable Transport Protocol

  • DUAL Finite-State Machine

  • Protocol-Specific Modules

  • EIGRP Tables

  • EIGRP Packet Types

  • EIGRP Convergence

The Enhanced Interior Gateway Routing Protocol (EIGRP) is an evolution from its predecessor IGRP, resulting from the demands of diverse and large-scale internetworks. EIGRP integrates the capabilities of link-state and distance vector protocols.

EIGRP provides backward compatibility and seamless interoperation with IGRP routers. An automatic-redistribution mechanism allows IGRP routes to be imported into Enhanced IGRP and vice versa, making it possible to migrate EIGRP into an existing ...

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