Route maps are similar to access lists; they both have criteria for matching the details of certain packets and an action of permitting or denying those packets. Unlike access lists, though, route maps can add to each "match" criterion a "set" criterion that actually changes the packet in a specified manner, or changes route information in a specified manner. Route maps also allow you more options for matching a given packet. Altogether, route maps are a powerful tool for creating customized routing policies in your network.
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This chapter excerpt from Routing TCP/IP by Jeff Doyle and Jennifer DeHaven Carroll covers the following topics with several case study examples:
- Configuring route maps
- Quality of service
- Route tagging
- IPv6 redistribution
Read the rest of Route maps and routing policy in this PDF.
Excerpted from Routing TCP/IP by Jeff Doyle and Jennifer DeHaven Carroll (ISBN: 158705202). Copyright 2005, Cisco Press. All rights reserved.