Chapter 13. Route Filtering

This chapter covers the following subject:

Chapter 11, “Route Redistribution,” presents several situations in which redistribution causes unwanted or inaccurate routes to exist in a particular router. For instance, in Figure 11-3 and the associated discussion, one or more routers choose a suboptimal route through a network. The problem in that example is that the routers prefer the lower administrative distance of Interior Gateway routing Protocol (IGRP) to the administrative distance of Routing Information Protocol (RIP). More generally, any time routes to the same destination are being redistributed into a routing domain by more than a single router, the potential for inaccurate routing exists. ...

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