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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>23.7 Per-Flow Monitoring</TITLE><META NAME="description" CONTENT="23.7 Per-Flow Monitoring"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node277.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node277.html"><LINK REL="previous" HREF="node272.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node272.html"><LINK REL="up" HREF="node265.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node265.html"><LINK REL="next" HREF="node274.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node274.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html5485" HREF="node274.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node274.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html5479" HREF="node265.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node265.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html5473" HREF="node272.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node272.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html5481" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html5483" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html5486" HREF="node274.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node274.html">23.7.1 The Flow Monitor</A><B> Up:</B> <A NAME="tex2html5480" HREF="node265.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node265.html">23. Trace and Monitoring</A><B> Previous:</B> <A NAME="tex2html5474" HREF="node272.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node272.html">23.6 Queue Monitoring</A>   <B> <A NAME="tex2html5482" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html5484" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H1><A NAME="SECTION04370000000000000000"></A><A NAME="sec:flowmon"></A><BR>23.7 Per-Flow Monitoring</H1><P>A collection of specialized classes are used to to implementper-flow statistics gathering.These classes include: <BR><TT>QueueMonitor/ED/Flowmon</TT>,<TT>QueueMonitor/ED/Flow</TT>, and <TT>Classifier/Hash</TT>.Typically, an arriving packet is inspected to determineto which flow it belongs.This inspection and flow mapping is performed by a <EM>classifier</EM>object (described in section <A HREF="node274.html#sec:flowmonitor" tppabs="http://www.isi.edu/nsnam/ns/doc/node274.html#sec:flowmonitor">23.7.1</A>).Once the correct flow is determined, the packet is passed toa <EM>flow monitor</EM>, which is responsible for collecting per-flowstate.Per-flow state is contained in <EM>flow</EM> objects in a one-to-onerelationship to the flows known by the flow monitor.Typically, a flow monitor will create flow objects on-demand whenpackets arrive that cannot be mapped to an already-known flow.<P><BR><HR><!--Table of Child-Links--><A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A><UL><LI><A NAME="tex2html5487" HREF="node274.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node274.html">23.7.1 The Flow Monitor</A><LI><A NAME="tex2html5488" HREF="node275.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node275.html">23.7.2 Flow Monitor Trace Format</A><LI><A NAME="tex2html5489" HREF="node276.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node276.html">23.7.3 The Flow Class</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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