What kind of configuration for a node?

Procedures to configure an individual node can be classified into:

• Control functions ($node entry - entry point to a node, $node reset - reset all agents at the node)
  
• Address and Port number management, unicast routing functions ($node id - return the node number) , agents are attached to a specific port for a node, $node agent (port) will return the port of the agents are attached to
  
• Agent management - attach agent - will attach agent to a port
  
• Adding neighbors - each node will keep track of nearby neighbor through instance of neighbor_

Overall node configuration can be done by $node node-config

Network Simutator, Ns-2 Trace format

Normal Trace Format

This information comes from The ns Manual "Trace and Monitoring Support: Trace File Format" chapter. This trace is used normal wired operations. The trace starts with one of four possible characters.

Event	Abbreviation	Type	Value
Normal Event	r: Receive d: Drop e: Error +: Enqueue -: Dequeue	%g %d %d %s %d %s %d %d.%d %d.%d %d %d
		double	Time
		int	Source Node
		int	Destination Node
		string	Packet Name
		int	Packet Size
		string	Flags
		int	Flow ID
		int	Source Address
		int	Destination Address
		int	Sequence Number
		int	Unique Packet ID

Depending on the packet type, the trace may log additional information:

Event	Type	Value
TCP Trace	%d 0x%x %d %d
	int	Ack Number
	hexadecimal	Flags
	int	Header Length
	int	Socket Address Length
Satellite Trace	%.2f %.2f %.2f %.2f
	double	Source Latitude
	double	Source Longitude
	double	Destination Latitude
	double	Destination Longitude

** For more click here

Network Simulator, NS-2

Network Simulator, NS-2 is a discrete event based simulator. It's a dual language simulator which consists of Object oriented Tcl/Tk and C++ as part of the front-end interpreter. Users can create simulator object through intrepeter and objects can be instantiated within the intrepreter.

Network Simulator, NS-2 manual can be obtained from here.

I used NS-2 on Cygwin.

There is a wiki on how to install and run Ns-2 on Cygwin.

** Before running Ns-2 cygwin, we need to set the path for Ns-2 in Cygwin

Copy the following path and paste it at the bottom of .bashrc file (this is for Cygwin and Ns-2 version 2.29)
---------------------------------------------------------------

export NS_HOME=`pwd`/ns-allinone-2.29
export PATH=$NS_HOME/tcl8.4.11/unix:$NS_HOME/tk8.4.11/unix:$NS_HOME/bin:$PATH
export LD_LIBRARY_PATH=$NS_HOME/otcl-1.11:$NS_HOME/lib:$NS_HOME/tcl8.4.11/
unix:$NS_HOME/tk8.4.11/ unix:$LD_LIBRARY_PATH
export TCL_LIBRARY=$NS_HOME/tcl8.4.11/library

Basically to start running Ns-2 on Cygwin, we need to initiate the graphical mode by typing "startxwin.bat"














and we can run any ns-2 tcl script by entering the ns command followed by the script

example :

ns example1.tcl