Dial-on-Demand Routing (DDR) Overview
DDR determines whether to bring up a connection that is not already active based on interesting and uninteresting traffic coming into the router. Interesting traffic brings up a connection, and uninteresting traffic doesn't.
A router decides which traffic is interesting and which isn't through preconfigured access lists and dialer lists. In Lesson 6-2 later in this chapter, you will learn how to configure interesting traffic.
Figure 6-6 displays the basic process of determining interesting traffic.
Figure 6-6. Interesting Versus Uninteresting Packets
A dialer list specifies interesting traffic that is allowed ...
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