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Route aggregation vs. route summarization

Is there a difference between route aggregation and route summarization? Find out here in this expert response from Michael Gregg.

What is the difference between route aggregation and route summarization?
In my understanding of these terms they are essentially the same. Route aggregation and summarization is a method that is used to generate a more general route. Therefore if an ISP has several class C address ranges these can be advertised as one common route. This reduces the burden of upstream routers. To use aggregation you must use classless addressing and use a routing protocol such as OSPF. An in-depth explanation can be found on the Netcraftsmen Web site.
This was last published in November 2006

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