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$ns enableMcast set node [$ns node] # agent to reside on this node; set group [$ns allocaddr] # multicast group for this agent; {\bfseries{}set srm [new Agent/SRM]} $srm set dst_ $group # configure the SRM agent; {\bfseries{}$ns attach-agent $node $srm} $srm set fid_ 1 # optional configuration; $srm log [open srmStats.tr w] # log statistics in this file; $srm trace [open srmEvents.tr w] # trace events for this agent;</PRE>The key steps in configuring a virgin SRM agent are to assignits multicast group, and attach it to a node.<P>Other useful configuration parameters areto assign a separate flow id to traffic originating from this agent,to open a log file for statistics, anda trace file for trace data<A NAME="tex2html59" HREF="footnode.html#foot14499" tppabs="http://www.isi.edu/nsnam/ns/doc/footnode.html#foot14499"><SUP>33.1</SUP></A>.<P>The filetcl/mcast/srm-nam.tcl../ns-2/srm-nam.tclAgent/SRM::sendcontains definitions that overload the agent's <TT>send</TT> methods;this separates control traffic originating from the agent by type.Each type is allocated a separate flowID.The traffic is separated into session messages (flowid = 40),requests (flowid = 41), and repair messages (flowid = 42).The base flowid can be changed by setting global variable <TT>ctrlFid</TT>to one less than the desired flowid before sourcing <TT>srm-nam.tcl</TT>.To do this, the simulation script must source <TT>srm-nam.tcl</TT>before creating any SRM agents.This is useful for analysis of traffic traces, orfor visualization in nam.<P><HR><!--Navigation Panel--><A NAME="tex2html8021" HREF="node431.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node431.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html8015" HREF="node429.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node429.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html8009" HREF="node429.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node429.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html8017" 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="tex2html8019" 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="tex2html8022" HREF="node431.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node431.html">33.1.1.0.2 Application Data Handling</A><B> Up:</B> <A NAME="tex2html8016" HREF="node429.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node429.html">33.1.1 Trivial Configuration</A><B> Previous:</B> <A NAME="tex2html8010" HREF="node429.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node429.html">33.1.1 Trivial Configuration</A>   <B> <A NAME="tex2html8018" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html8020" 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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