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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>27.1.2.0.3 Shared Tree Mode</TITLE><META NAME="description" CONTENT="27.1.2.0.3 Shared Tree Mode"><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="node322.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node322.html"><LINK REL="previous" HREF="node320.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node320.html"><LINK REL="up" HREF="node318.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node318.html"><LINK REL="next" HREF="node322.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node322.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html6262" HREF="node322.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node322.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html6256" HREF="node318.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node318.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html6250" HREF="node320.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node320.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html6258" 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="tex2html6260" 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="tex2html6263" HREF="node322.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node322.html">27.1.2.0.4 Bi-directional Shared Tree</A><B> Up:</B> <A NAME="tex2html6257" HREF="node318.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node318.html">27.1.2 Protocol Specific configuration</A><B> Previous:</B> <A NAME="tex2html6251" HREF="node320.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node320.html">27.1.2.0.2 Dense Mode</A>   <B> <A NAME="tex2html6259" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html6261" 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="SECTION05212030000000000000">27.1.2.0.3 Shared Tree Mode</A></H4>Simplified sparse mode <TT>ST.tcl</TT> is a version of a shared-treemulticast protocol. Class variable array <TT>RP<BR>_</TT> indexed by groupdetermines which node is the RP for a particular group. For example:<PRE> ST set RP_($group) $node0 $ns mrtproto ST</PRE>At the time the multicast simulation is started, the protocol willcreate and install encapsulator objects at nodes that have multicastsenders, decapsulator objects at RPs and connect them. To join agroup, a node sends a graft message towards the RP of the group. Toleave a group, it sends a prune message. The protocol currently doesnot support dynamic changes and LANs.<P><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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