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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>26.2.0.0.1 Asymmetric Routing</TITLE><META NAME="description" CONTENT="26.2.0.0.1 Asymmetric Routing"><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="node292.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node292.html"><LINK REL="previous" HREF="node290.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node290.html"><LINK REL="up" HREF="node290.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node290.html"><LINK REL="next" HREF="node292.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node292.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html5802" HREF="node292.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node292.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html5796" HREF="node290.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node290.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html5790" HREF="node290.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node290.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html5798" 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="tex2html5800" 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="tex2html5803" HREF="node292.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node292.html">26.2.0.0.2 MultiPath Routing</A><B> Up:</B> <A NAME="tex2html5797" HREF="node290.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node290.html">26.2 Other Configuration Mechanisms</A><B> Previous:</B> <A NAME="tex2html5791" HREF="node290.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node290.html">26.2 Other Configuration Mechanisms</A>   <B> <A NAME="tex2html5799" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html5801" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H4><A NAME="SECTION05120010000000000000">26.2.0.0.1 Asymmetric Routing</A></H4>Asymmetric routing occurs when the path from node to node is different from the path from to .The following shows a simple topology, and cost configurationthat can achieve such a result:<P><TABLE WIDTH="213"><TR><TD>Nodes and use different paths to reach each other.All other pairs of nodes use symmetric paths to reach each other.</TD></TR></TABLE><TABLE WIDTH="115"><TR><TD> [height=1in]asymmetric_routing.eps</TD></TR></TABLE><TABLE WIDTH="213"><TR><TD> <PRE> \$ns cost \$n1 \$r1 2 \$ns cost \$n2 \$r2 2 \$ns cost \$r1 \$n2 3</PRE></TD></TR></TABLE><P>Any routing protocol that uses link costs as the metric can observesuch asymmetric routing if the link costs are appropriately configured<A NAME="tex2html56" HREF="footnode.html#foot11134" tppabs="http://www.isi.edu/nsnam/ns/doc/footnode.html#foot11134"><SUP>26.3</SUP></A>.<P><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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