How to Configure a Router on an IPQoS-Enabled Network

The next procedure uses as its example the topology in Figure 2–4.

1. Review the configuration files for all IPQoS-enabled systems on your network.

2. Identify each codepoint that is used in the various policies.

   List the codepoints, and the systems and classes, to which the codepoints apply. The table can illustrate areas where you might have used the same codepoint. This practice is acceptable, but you should provide other criteria in the IPQoS configuration file, such as a precedence selector, to be used to determine the precedence of identically marked classes.

   For example, for the sample network that is used in the procedures of this chapter, you might construct the following codepoint table.

   Table 3–2 Per-Hop Behaviors Configured for a Sample Network

   System	Class	PHB	DS Codepoint
   Goldweb	video	EF	46 (101110)
   “ “	goldweb	AF11	10 (001010)
   Userweb	webout	AF12	12 ( 001100)
   BigAPPs	smtp	AF13	14 ( 001110)
   “	news	AF18	18 ( 010010)
   “	ftp conformant traffic	AF22	20 ( 010100)
   “	ftp nonconformant traffic	AF31	26 ( 011010)

3. Add the codepoints from your network's IPQoS configuration files to the appropriate files on the diffserv router.

   The codepoints you supply should help to configure the router's diffserv scheduling mechanism. Refer to the router manufacturers' documentation and web sites for instructions.