IGP route redistribution, route summarization and default routing

Route redistribution, route summarization and default routing are techniques used to distribute traffic using Interior Gateway Protocols (IGPs).

Learn about several topics related to the use of multiple Interior Gateway Protocols (IGPs) in this chapter from CCIE Routing and Switching Official Exam Certification Guide, 2nd Edition. IGPs can use default routes to pull packets toward a small set of routers, with those routers having learned routes from some external source. IGPs can use route summarization with a single routing protocol, but it is often used at redistribution points between IGPs as well. Route redistribution by definition also involves moving routes from one routing source to another.

This chapter download covers IP routing topics including:

  • OSPF
  • EIGRP
  • Route filtering
  • RIPv2
  • The use of show and debug commands
Read the rest of IGP route redistribution, route summarization and default routing in this PDF.


Excerpted from CCIE Routing and Switching Official Exam Certification Guide, 2nd Edition by Jim Geier, Naren Mehta, Wendell Odom (ISBN: 1587201410). Copyright 2006, Cisco Press. All rights reserved.

This was first published in July 2007

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