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To provide true differentiated services, you must include a Diffserv-aware router in your network topology, as described in Hardware Strategies for the Diffserv Network. The actual steps for configuring Diffserv on a router and updating that router's files are outside the scope of this guide.
This section gives general steps for coordinating the forwarding information among various IPQoS-enabled systems on the network and the Diffserv router.
The next procedure uses as its example the topology in Figure 2-4.
Before You Begin
The next procedure assumes that you have already configured the IPQoS systems on your network by performing the previous tasks in this chapter.
List the codepoints, and the systems and classes, to which the codepoints apply. The next table can illustrate areas where you might have used the same codepoint. This practice is acceptable. However, you should provide other criteria in the IPQoS configuration file, such as a precedence selector, to determine the precedence of identically marked classes.
For example, for the sample network that is used in the procedures throughout this chapter, you might construct the following codepoint table.
The codepoints that you supply should help to configure the router's Diffserv scheduling mechanism. Refer to the router manufacturer's documentation and web sites for instructions.