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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>26.4.2.0.1 Actions at the individual nodes</TITLE><META NAME="description" CONTENT="26.4.2.0.1 Actions at the individual nodes"><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="node307.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node307.html"><LINK REL="previous" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html"><LINK REL="up" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html"><LINK REL="next" HREF="node307.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node307.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html6024" HREF="node307.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node307.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html6018" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html6012" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html6020" 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="tex2html6022" 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="tex2html6025" HREF="node307.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node307.html">26.4.2.0.2 Global Actions</A><B> Up:</B> <A NAME="tex2html6019" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html">26.4.2 Interface to Network</A><B> Previous:</B> <A NAME="tex2html6013" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html">26.4.2 Interface to Network</A>   <B> <A NAME="tex2html6021" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html6023" 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="SECTION05142010000000000000">26.4.2.0.1 Actions at the individual nodes</A></H4>Following any change in the topology,the network dynamics models will first invoke[]rtObject::intf-changed../ns-2/route-proto.tclrtObject:;intf-changedat each of the affected nodes.For each of the unicast routing protocols operating at that node,[]rtObject::intf-changed will invoke each individual protocol's instance procedure, []intf-changed,followed by that protocol's []compute-routes.<P>After each protocol has computed its individual routes[]rtObject::intf-changed invokes []compute-routesto possibly install new routes.If new routes were installed in the node,[]rtObject::compute-routes will invoke[]send-updates for each of the protocols operating at the node.The procedure will alsoflag the multicast route object../ns-2/route-proto.tclrtObject::flag-multicastof the route changes at the node, indicating the number of changes that have been executed.[]rtObject::flag-multicast will, in turn, notifythe multicast route object to take appropriate action.<P>The one exceptionto the interface between unicast and multicast routing is the interactionbetween dynamic dense mode multicast and detailed unicast routing.This dynamicDM implementation in assumes neighbor nodeswill send an implicit update whenever their routes change,without actually sending the update. It then uses this implicit information to computeappropriate parent-child relationships for the multicast spanning trees.Therefore, detailed unicast routing will invoke<TT>rtObject_ flag-multicast 1</TT> whenever it receives a route update as well,even if that update does not result in any change in its own routing tables.<P><HR><!--Navigation Panel--><A NAME="tex2html6024" HREF="node307.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node307.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html6018" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html6012" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html6020" 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="tex2html6022" 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="tex2html6025" HREF="node307.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node307.html">26.4.2.0.2 Global Actions</A><B> Up:</B> <A NAME="tex2html6019" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html">26.4.2 Interface to Network</A><B> Previous:</B> <A NAME="tex2html6013" HREF="node305.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node305.html">26.4.2 Interface to Network</A>   <B> <A NAME="tex2html6021" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html6023" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <!--End of Navigation Panel--><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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