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<A NAME="chap:diffserv"></A><BR>9. Differentiated Services Module in </H1>
<B>Note: The Differentiated Services module described in this chapter has been integrated into ns-2.1b8.</B>
Differentiated Services, or DiffServ, is an IP QoS architecture based on
packet marking that allows packets to be prioritized according to user
requirements.
During the time of congestion,
more low priority packets are discarded than high priority packets.
This chapter describes the DiffServ module that was originally
implemented by the Advanced IP Networks group in
Nortel Networks [<A HREF="node589.html#Diffserv" tppabs="http://www.isi.edu/nsnam/ns/doc/node589.html#Diffserv">29</A>].
<BR><HR><!--Table of Child-Links--><A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A><UL><LI><A NAME="tex2html2701" HREF="node92.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node92.html">9.1 Overview</A><LI><A NAME="tex2html2702" HREF="node93.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node93.html">9.2 Implementation</A><UL><LI><A NAME="tex2html2703" HREF="node94.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node94.html">9.2.1 RED queue in DiffServ module</A><LI><A NAME="tex2html2704" HREF="node95.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node95.html">9.2.2 Edge and core routers</A><LI><A NAME="tex2html2705" HREF="node96.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node96.html">9.2.3 Policy</A></UL><BR><LI><A NAME="tex2html2706" HREF="node97.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node97.html">9.3 Configuration</A><LI><A NAME="tex2html2707" HREF="node98.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node98.html">9.4 Commands at a glance</A></UL><!--End of Table of Child-Links--><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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