1210 lines
42 KiB
Plaintext
1210 lines
42 KiB
Plaintext
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
|
||
|
||
<!--Converted with LaTeX2HTML 2017.2 (Released Jan 23, 2017) -->
|
||
<HTML>
|
||
<HEAD>
|
||
<TITLE>4. Quick Intro</TITLE>
|
||
<META NAME="description" CONTENT="4. Quick Intro">
|
||
<META NAME="keywords" CONTENT="html_document">
|
||
<META NAME="resource-type" CONTENT="document">
|
||
<META NAME="distribution" CONTENT="global">
|
||
|
||
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
|
||
<META NAME="Generator" CONTENT="LaTeX2HTML v2017.2">
|
||
<META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css">
|
||
|
||
<LINK REL="STYLESHEET" HREF="html_document.css">
|
||
|
||
<LINK REL="next" HREF="node5.html">
|
||
<LINK REL="previous" HREF="node3.html">
|
||
<LINK REL="up" HREF="html_document.html">
|
||
<LINK REL="next" HREF="node5.html">
|
||
</HEAD>
|
||
|
||
<BODY >
|
||
|
||
<DIV CLASS="navigation"><!--Navigation Panel-->
|
||
<A NAME="tex2html268"
|
||
HREF="node5.html">
|
||
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next"
|
||
SRC="next.png"></A>
|
||
<A NAME="tex2html266"
|
||
HREF="html_document.html">
|
||
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up"
|
||
SRC="up.png"></A>
|
||
<A NAME="tex2html260"
|
||
HREF="node3.html">
|
||
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous"
|
||
SRC="prev.png"></A>
|
||
<BR>
|
||
<B> Next:</B> <A NAME="tex2html269"
|
||
HREF="node5.html">5. Advanced Usage</A>
|
||
<B> Up:</B> <A NAME="tex2html267"
|
||
HREF="html_document.html">IMUNES manual</A>
|
||
<B> Previous:</B> <A NAME="tex2html261"
|
||
HREF="node3.html">3. User Interface Layout</A>
|
||
<BR>
|
||
<BR></DIV>
|
||
<!--End of Navigation Panel-->
|
||
<!--Table of Child-Links-->
|
||
<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
|
||
|
||
<UL CLASS="ChildLinks">
|
||
<LI><A NAME="tex2html270"
|
||
HREF="node4.html#SECTION00410000000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN> Simple Network Scenario</A>
|
||
<UL>
|
||
<LI><A NAME="tex2html271"
|
||
HREF="node4.html#SECTION00411000000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">1</SPAN> Building a simple network</A>
|
||
<UL>
|
||
<LI><A NAME="tex2html272"
|
||
HREF="node4.html#SECTION00411100000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">1</SPAN> Adding and deleting network elements</A>
|
||
<LI><A NAME="tex2html273"
|
||
HREF="node4.html#SECTION00411200000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN> Rearranging network elements</A>
|
||
</UL>
|
||
<LI><A NAME="tex2html274"
|
||
HREF="node4.html#SECTION00412000000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN> Configuring a simple network</A>
|
||
<UL>
|
||
<LI><A NAME="tex2html275"
|
||
HREF="node4.html#SECTION00412100000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">1</SPAN> Hub/LAN switch configuration window</A>
|
||
<LI><A NAME="tex2html276"
|
||
HREF="node4.html#SECTION00412200000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">2</SPAN> PC/Host/Click router configuration window</A>
|
||
<UL>
|
||
<LI><A NAME="tex2html277"
|
||
HREF="node4.html#SECTION00412210000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">1</SPAN> <SPAN CLASS="textit">Static routes</SPAN></A>
|
||
</UL>
|
||
<LI><A NAME="tex2html278"
|
||
HREF="node4.html#SECTION00412300000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">3</SPAN> Router configuration window</A>
|
||
<UL>
|
||
<LI><A NAME="tex2html279"
|
||
HREF="node4.html#SECTION00412310000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">3</SPAN>.<SPAN CLASS="arabic">1</SPAN> <SPAN CLASS="textit">Routing models and protocols</SPAN></A>
|
||
</UL>
|
||
<LI><A NAME="tex2html280"
|
||
HREF="node4.html#SECTION00412400000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">4</SPAN> Link configuration window</A>
|
||
<LI><A NAME="tex2html281"
|
||
HREF="node4.html#SECTION00412500000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">5</SPAN> Configured network topology</A>
|
||
</UL>
|
||
<LI><A NAME="tex2html282"
|
||
HREF="node4.html#SECTION00413000000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">3</SPAN> Simulating a simple network</A>
|
||
<UL>
|
||
<LI><A NAME="tex2html283"
|
||
HREF="node4.html#SECTION00413100000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">3</SPAN>.<SPAN CLASS="arabic">1</SPAN> Starting an experiment</A>
|
||
<LI><A NAME="tex2html284"
|
||
HREF="node4.html#SECTION00413200000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">3</SPAN>.<SPAN CLASS="arabic">2</SPAN> Options from the node and the link menu</A>
|
||
<LI><A NAME="tex2html285"
|
||
HREF="node4.html#SECTION00413300000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">3</SPAN>.<SPAN CLASS="arabic">3</SPAN> Terminating an experiment</A>
|
||
</UL>
|
||
</UL>
|
||
<BR>
|
||
<LI><A NAME="tex2html286"
|
||
HREF="node4.html#SECTION00420000000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">2</SPAN> Configuration files management</A>
|
||
<UL>
|
||
<LI><A NAME="tex2html287"
|
||
HREF="node4.html#SECTION00421000000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">1</SPAN> Saving a virtual network configuration</A>
|
||
<LI><A NAME="tex2html288"
|
||
HREF="node4.html#SECTION00422000000000000000"><SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">2</SPAN> Opening a virtual network configuration</A>
|
||
</UL></UL>
|
||
<!--End of Table of Child-Links-->
|
||
<HR>
|
||
|
||
<H1><A NAME="SECTION00400000000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>. Quick Intro</A>
|
||
</H1>
|
||
|
||
<P>
|
||
|
||
<H1><A NAME="SECTION00410000000000000000"></A>
|
||
<A NAME="sec:SimpleNetworkScenario"></A>
|
||
<BR>
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN> Simple Network Scenario
|
||
</H1>
|
||
In this section we will show how to build, configure and simulate the following
|
||
simple network topology:
|
||
|
||
<P>
|
||
Personal computers (<SPAN CLASS="textit">office-pc1</SPAN> and <SPAN CLASS="textit">office-pc2</SPAN>) from the network
|
||
192.168.1.0/24 are connected to the LAN switch (<SPAN CLASS="textit">office-switch</SPAN>) which is
|
||
connected to the router (<SPAN CLASS="textit">office-router</SPAN>). The server (<SPAN CLASS="textit">office-host</SPAN>)
|
||
from the network 192.168.2.0/24 is directly connected to the router
|
||
(<SPAN CLASS="textit">office-router</SPAN>). Personal computers from the first network have route
|
||
only to the network 192.168.2.0/24. The server from the second network has the
|
||
default route. Quagga routing is enabled on the router in order to be able to
|
||
serve and receive dynamic route updates.
|
||
|
||
<P>
|
||
|
||
<H2><A NAME="SECTION00411000000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">1</SPAN> Building a simple network</A>
|
||
</H2>
|
||
After running IMUNES on FreeBSD with some kind of X11 window manager (see
|
||
Section <A HREF="node3.html#sec:UserInterfaceLayout">3</A>), we will build previously described
|
||
network using tools from the toolbox (see Section <A HREF="node3.html#sec:toolbox">3.1</A>).
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00411100000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">1</SPAN> Adding and deleting network elements</A>
|
||
</H3>
|
||
To draw a node click on the corresponding node tool and then click on the
|
||
workspace to place it. To connect nodes click on the <SPAN CLASS="textit">Link tool</SPAN>, then
|
||
click and hold on the source node and go to the destination node.
|
||
|
||
<P>
|
||
Now draw a router, a host, a LAN switch and two PCs. Using the <SPAN CLASS="textit">Link tool</SPAN>
|
||
connect the LAN switch to the router and then connect each PC to the LAN
|
||
switch. Connect the host directly to the router. The created network topology
|
||
should look like the one in Figure <A HREF="#fig:simple_topology">4.1</A>.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:simple_topology"></A><A NAME="780"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.1:</STRONG>
|
||
<SPAN CLASS="textit">Simple network topology</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="1022" HEIGHT="778" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./simple_topology.png"
|
||
ALT="Image simple_topology"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
When nodes are connected with the <SPAN CLASS="textit">Link tool</SPAN> (the direction does not
|
||
matter), the source node, the destination node and the link automatically get
|
||
preconfigured parameters. When a mouse pointer is above a node or a link, some
|
||
of the configured parameters are shown on the left side of the statusbar placed
|
||
at the bottom of the window (Figure <A HREF="#fig:statusbar_node">4.2</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:statusbar_node"></A><A NAME="781"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.2:</STRONG>
|
||
<SPAN CLASS="textit">Node parameters in the statusbar</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="749" HEIGHT="19" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./statusbar1.png"
|
||
ALT="Image statusbar1"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
Some of the parameters can be visible on the canvas: interface names (link
|
||
layer: e0, e1, e2 and network layer: eth0, eth1), IPv4/IPv6 addresses of
|
||
network layer elements (PC, host, router), node names (router1, host1, switch1,
|
||
pc1, pc2) and link labels (Bandwidth, Delay, BER or Duplicate if their values
|
||
are not default).
|
||
|
||
<P>
|
||
You can manipulate with the visibility of nodes and links parameters from the
|
||
View menu (Figure <A HREF="#fig:view_menu1">4.3</A>). In this simple scenario we do not want
|
||
for IPv6 addresses to be visible, so we will turn the <SPAN CLASS="textit">Show IPv6
|
||
Addresses</SPAN> option off.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:view_menu1"></A><A NAME="782"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.3:</STRONG>
|
||
<SPAN CLASS="textit">Show or hide nodes and links parameters</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="208" HEIGHT="209" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./view_menu1.png"
|
||
ALT="Image view_menu1"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
To delete the network element select it using the <SPAN CLASS="textit">Select tool</SPAN> and then
|
||
use the <SPAN CLASS="textit">Delete</SPAN> keyboard button. You can also delete it by right clicking
|
||
on it and clicking on the <SPAN CLASS="textit">Delete</SPAN> label in the popped up menu. The node
|
||
deletion is automatically followed by the deletion of associated links.
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00411200000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN> Rearranging network elements</A>
|
||
</H3>
|
||
You can change position of the network element (node or link) and/or the node
|
||
name. To move both the network element and its name select the network element
|
||
with the <SPAN CLASS="textit">Select tool</SPAN> and drag it to the designated position. To move
|
||
only the node name select it with the <SPAN CLASS="textit">Select tool</SPAN> and drag it to the
|
||
designated position.
|
||
|
||
<P>
|
||
Using the <SPAN CLASS="textit">Select tool</SPAN> you can also move around a group of connected
|
||
nodes which can be selected using the <SPAN CLASS="textit">Ctrl</SPAN> keyboard button in addition
|
||
to the left click. To select the whole network topology use <SPAN CLASS="textit">Select All</SPAN>
|
||
option from the <SPAN CLASS="textit">Edit</SPAN> menu.
|
||
|
||
<P>
|
||
For automatic rearranging of all network elements or rearranging the selected
|
||
group of network elements use <SPAN CLASS="textit">Rearrange</SPAN> and <SPAN CLASS="textit">Rearrange All</SPAN> options
|
||
from the <SPAN CLASS="textit">Tools</SPAN> menu. To stop the rearranging process click with the
|
||
<SPAN CLASS="textit">Select tool</SPAN>.
|
||
|
||
<P>
|
||
|
||
<H2><A NAME="SECTION00412000000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN> Configuring a simple network</A>
|
||
</H2>
|
||
|
||
<P>
|
||
Although preconfigured parameters of network elements are usually sufficient to
|
||
start a simulation (automatically provided IPv4/IPv6 addresses, the default
|
||
static route on the PC and the host and routing model and protocols parameters
|
||
on the router as well), in this scenario we will set up our own parameters.
|
||
|
||
<P>
|
||
To open the network element configuration window:
|
||
|
||
<UL>
|
||
<LI>right click on the network element and select the <SPAN CLASS="textit">Configure</SPAN>
|
||
label from the popped up menu (Figure <A HREF="#fig:configure_label">4.4</A>)
|
||
|
||
<P>
|
||
or
|
||
|
||
<P>
|
||
</LI>
|
||
<LI>double click on the network element.
|
||
</LI>
|
||
</UL>
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:configure_label"></A><A NAME="783"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.4:</STRONG>
|
||
<SPAN CLASS="textit">Configure a network element</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="183" HEIGHT="240" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./configure_label.png"
|
||
ALT="Image configure_label"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
Network elements configuration parameters can be also changed through the
|
||
topology tree. To show the topology tree turn on the <SPAN CLASS="textit">Show Topology Tree</SPAN>
|
||
option from the <SPAN CLASS="textit">View</SPAN> menu. The tree with a list of network topology
|
||
elements (nodes and links) will be shown on the right side of the window
|
||
(Figure <A HREF="#fig:topology_tree">4.5</A>). To open the network element configuration
|
||
window double click or use the <SPAN CLASS="textit">Enter</SPAN> keyboard button on node, interface
|
||
or link label in the topology tree.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:topology_tree"></A><A NAME="784"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.5:</STRONG>
|
||
<SPAN CLASS="textit">Changing configuration parameters through the topology tree</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="1022" HEIGHT="778" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./topology_tree.png"
|
||
ALT="Image topology_tree"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
Depending on the type of a network element in our topology, there are 4 types
|
||
of configuration windows:
|
||
|
||
<P>
|
||
|
||
<UL>
|
||
<LI><SPAN CLASS="textit">Hub/LAN switch configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">PC/Host/Click router configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">Router configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">Link configuration</SPAN> window
|
||
</LI>
|
||
</UL>
|
||
|
||
<P>
|
||
There are also other types of configuration windows which are explained in
|
||
other sections:
|
||
|
||
<P>
|
||
|
||
<UL>
|
||
<LI><SPAN CLASS="textit">External interface configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">External connection configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">NAT64 configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">RSTP switch configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">Filter node configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">Packet generator configuration</SPAN> window
|
||
</LI>
|
||
<LI><SPAN CLASS="textit">Click switch configuration</SPAN> window
|
||
</LI>
|
||
</UL>
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00412100000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">1</SPAN> Hub/LAN switch configuration window</A>
|
||
</H3>
|
||
The <SPAN CLASS="textit">hub/LAN switch configuration</SPAN> window, as well as the configuration
|
||
windows of other node types, contains a node name field. Besides that it
|
||
contains only link layer interface parameters.
|
||
|
||
<P>
|
||
We will change the LAN switch name and data packet scheduling method (from
|
||
preconfigured First In First Out (FIFO) data packet scheduling method to
|
||
Weighted Fair Queuing (WFQ) method).
|
||
|
||
<P>
|
||
Change the node name to <SPAN CLASS="textit">office-switch</SPAN>.
|
||
To change data packet scheduling method select the link layer interface
|
||
<SPAN CLASS="textit">e0</SPAN> from the list of interfaces, choose <SPAN CLASS="textit">WFQ</SPAN> option from the
|
||
<SPAN CLASS="textit">Queue</SPAN> menu and click on the <SPAN CLASS="textit">Apply</SPAN> button (Figure
|
||
<A HREF="#fig:LANswitch_config">4.6</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:LANswitch_config"></A><A NAME="785"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.6:</STRONG>
|
||
<SPAN CLASS="textit">LAN switch configuration window</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="454" HEIGHT="326" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./LANswitch_config.png"
|
||
ALT="Image LANswitch_config"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
Packet scheduling method is now applied and you can see new queuing discipline
|
||
for interface <SPAN CLASS="textit">e0</SPAN> in the column <SPAN CLASS="textit">Queue disc</SPAN> (Figure
|
||
<A HREF="#fig:LANswitch_config_applied">4.7</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:LANswitch_config_applied"></A><A NAME="786"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.7:</STRONG>
|
||
<SPAN CLASS="textit">LAN switch configuration window with applied changes</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="454" HEIGHT="326" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./LANswitch_config_applied.png"
|
||
ALT="Image LANswitch_config_applied"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
Repeat the same procedure for the other link layer interfaces.
|
||
Changed configuration is already applied so you can close the configuration
|
||
window with the <SPAN CLASS="textit">Cancel</SPAN> button but you can also use the <SPAN CLASS="textit">Apply and
|
||
Close</SPAN> button.
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00412200000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">2</SPAN> PC/Host/Click router configuration window</A>
|
||
</H3>
|
||
The <SPAN CLASS="textit">PC/Host/Click router configuration</SPAN> window consists of two
|
||
subwindows. Each of them is associated with one of the following tabs:
|
||
<SPAN CLASS="textit">Configuration</SPAN> and <SPAN CLASS="textit">Interfaces</SPAN> (Figure <A HREF="#fig:pc_config_tabs">4.8</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:pc_config_tabs"></A><A NAME="787"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.8:</STRONG>
|
||
<SPAN CLASS="textit">Tabs in the PC/Host/Click router configuration window</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="517" HEIGHT="103" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./pc_config_tabs.png"
|
||
ALT="Image pc_config_tabs"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
Besides a node name field, <SPAN CLASS="textit">PC/Host/Click router configuration</SPAN> window
|
||
contains startup services, routing parameters and custom configuration
|
||
parameters (in the window associated with the <SPAN CLASS="textit">Configuration</SPAN> tab) and
|
||
network interface parameters (in the window associated with the
|
||
<SPAN CLASS="textit">Interfaces</SPAN> tab).
|
||
|
||
<P>
|
||
We will change the node name, network interface parameters and routing
|
||
parameters.
|
||
|
||
<P>
|
||
Change the host node name to <SPAN CLASS="textit">office-host</SPAN> and PC node names to
|
||
<SPAN CLASS="textit">office-pc1</SPAN> and <SPAN CLASS="textit">office-pc2</SPAN>.
|
||
To change IPv4 address left click on the <SPAN CLASS="textit">Interfaces</SPAN> tab, select
|
||
interface <SPAN CLASS="textit">eth0</SPAN> from the list of interfaces, change the IPv4 address
|
||
field and click on the <SPAN CLASS="textit">Apply</SPAN> button (Figure <A HREF="#fig:pc_config_ipv4">4.9</A>).
|
||
We will change the host IPv4 address field to 192.168.2.5/24 (now it belongs to
|
||
192.168.2.0/24) and PC IPv4 address fields to 192.168.1.5/24 and 192.168.1.7/24
|
||
(now they belong to network 192.168.1.0/24). IP address fields require the CIDR
|
||
notation, so the IPv4 address is followed by a slash and a network length.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:pc_config_ipv4"></A><A NAME="788"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.9:</STRONG>
|
||
<SPAN CLASS="textit">Changing IPv4 address</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="517" HEIGHT="513" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./pc_config_ipv4.png"
|
||
ALT="Image pc_config_ipv4"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
|
||
<H4><A NAME="SECTION00412210000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">1</SPAN> <SPAN CLASS="textit">Static routes</SPAN></A>
|
||
</H4>
|
||
|
||
<P>
|
||
PCs and Hosts both use static routing. The preconfigured routing table contains
|
||
only the default route. Every static route, as well as the default route,
|
||
consists of:
|
||
|
||
<OL>
|
||
<LI>the destination network: an IP address which is followed by a slash and
|
||
a network prefix and
|
||
</LI>
|
||
<LI>the next hop network interface IP address (which is an IP address
|
||
without a slash and without a network prefix).
|
||
</LI>
|
||
</OL>
|
||
|
||
<P>
|
||
If the route syntax is wrong, that route will be silently ignored.
|
||
|
||
<P>
|
||
We will add the static route on <SPAN CLASS="textit">office-pc1</SPAN> and <SPAN CLASS="textit">office-pc2</SPAN> for the
|
||
network 192.168.2.0/24 through the gateway 192.168.1.1 (Figure
|
||
<A HREF="#fig:pc_config_staticroutes">4.10</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:pc_config_staticroutes"></A><A NAME="790"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.10:</STRONG>
|
||
<SPAN CLASS="textit">Adding the static route on the PC</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="505" HEIGHT="109" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./pc_config_staticroutes.png"
|
||
ALT="Image pc_config_staticroutes"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
On <SPAN CLASS="textit">office-host</SPAN> we will change default gateway address to 192.168.2.1
|
||
(Figure <A HREF="#fig:host_config_staticroutes">4.11</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:host_config_staticroutes"></A><A NAME="791"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.11:</STRONG>
|
||
<SPAN CLASS="textit">Adding the static route on the PC</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="505" HEIGHT="109" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./host_config_staticroutes.png"
|
||
ALT="Image host_config_staticroutes"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
IPv6 addresses and default routes (placed below IPv4 addresses and routes) can
|
||
be deleted.
|
||
|
||
<P>
|
||
To apply the changed configuration and close the configuration window click on
|
||
the <SPAN CLASS="textit">Apply and Close</SPAN> button.
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00412300000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">3</SPAN> Router configuration window</A>
|
||
</H3>
|
||
The <SPAN CLASS="textit">router configuration window</SPAN>, in addition to fields from
|
||
<SPAN CLASS="textit">PC/Host/Click router configuration</SPAN> window, contains the part for
|
||
choosing the routing model and protocols, as well as an <SPAN CLASS="textit">IPsec</SPAN> tab with
|
||
IPsec parameters (See IPsec Section TODO).
|
||
|
||
<P>
|
||
We will only change the node name and network interface parameters.
|
||
|
||
<P>
|
||
Change the node name to <SPAN CLASS="textit">office-router</SPAN> and IPv4 addresses on both network
|
||
interfaces: 192.168.1.1/24 on the network interface <SPAN CLASS="textit">eth0</SPAN> and
|
||
192.168.2.1/24 on the network interface <SPAN CLASS="textit">eth1</SPAN>.
|
||
|
||
<P>
|
||
|
||
<H4><A NAME="SECTION00412310000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">3</SPAN>.<SPAN CLASS="arabic">1</SPAN> <SPAN CLASS="textit">Routing models and protocols</SPAN></A>
|
||
</H4>
|
||
|
||
<P>
|
||
There are three possible routing models:
|
||
|
||
<OL>
|
||
<LI>the quagga model
|
||
</LI>
|
||
<LI>the xorp model (eXtensible Open Router Platform)
|
||
</LI>
|
||
<LI>the static model
|
||
</LI>
|
||
</OL>
|
||
|
||
<P>
|
||
In the case of quagga and xorp routing models, there are options for
|
||
enabling/disabling RIP, RIPng, OSPFv2 and OSPFv3. By default, all new quagga or
|
||
xorp router instances will have both RIPv2 and RIPng enabled. The defaults can
|
||
be changed with the <SPAN CLASS="textit">Tools <SPAN CLASS="MATH"><IMG
|
||
WIDTH="20" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="img1.png"
|
||
ALT="$\to$"></SPAN> Routing protocol defaults</SPAN> option from
|
||
the menubar, which will be applied to all selected routers (if any) at the time
|
||
of change, as well as to all the subsequentially created ones (see Section
|
||
<A HREF="node5.html#sec:RoutingProtocolDefaults">5.3.5</A>).
|
||
In the case of static routing model, the router uses routes from the static
|
||
routes field that has the same syntax as the static routes field in the
|
||
<SPAN CLASS="textit">PC/Host/Click router configuration</SPAN> window.
|
||
|
||
<P>
|
||
We will leave the default router model - quagga with RIP and RIPng protocols
|
||
enabled, and OSPFv2 and OSPFv3 protocols disabled (Figure
|
||
<A HREF="#fig:router_config_routingmodels">4.12</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:router_config_routingmodels"></A><A NAME="793"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.12:</STRONG>
|
||
<SPAN CLASS="textit">Routing models and protocols</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="517" HEIGHT="155" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./router_config_routingmodels.png"
|
||
ALT="Image router_config_routingmodels"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00412400000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">4</SPAN> Link configuration window</A>
|
||
</H3>
|
||
The <SPAN CLASS="textit">link configuration</SPAN> window offers the possibility to configure the
|
||
link bandwidth (between 0 and 10<SUP>9</SUP> bps), the propagation delay
|
||
(between 0 and 10<SUP>7</SUP> <SPAN CLASS="MATH"><IMG
|
||
WIDTH="13" HEIGHT="29" ALIGN="MIDDLE" BORDER="0"
|
||
SRC="img2.png"
|
||
ALT="$\mu$"></SPAN>s), the bit error
|
||
rate (between 0 and 10<SUP>12</SUP>) and the probability of package
|
||
duplication (between 0 and 50%). There are also display properties: the link
|
||
width (line thickness between 1 and 8) and the link color (red, green, blue,
|
||
yellow, magenta, cyan or black).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:link_config"></A><A NAME="794"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.13:</STRONG>
|
||
<SPAN CLASS="textit">Link configuration window</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="251" HEIGHT="293" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./link_config.png"
|
||
ALT="Image link_config"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
Default values are as follows: the link which transmits packets without errors
|
||
and without any possibility for the packet duplication with the unlimited link
|
||
bandwidth and the zero propagation delay. The link width is set to value 2 and
|
||
the link color is red.
|
||
|
||
<P>
|
||
We will leave default values on all links except on the link between
|
||
<SPAN CLASS="textit">office-switch</SPAN> and <SPAN CLASS="textit">office-router</SPAN> (Figure
|
||
<A HREF="#fig:configured_topology">4.14</A>). On that link we will set up the delay of 30000
|
||
<SPAN CLASS="MATH"><IMG
|
||
WIDTH="13" HEIGHT="29" ALIGN="MIDDLE" BORDER="0"
|
||
SRC="img2.png"
|
||
ALT="$\mu$"></SPAN>s. Delay will be tested during the network simulation with the
|
||
<SPAN CLASS="textit">traceroute</SPAN> tool (see Section <A HREF="#sec:NodeandLinkMenuOptions">4.1.3</A>).
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00412500000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">5</SPAN> Configured network topology</A>
|
||
</H3>
|
||
Configured network topology should look like the one in Figure
|
||
<A HREF="#fig:configured_topology">4.14</A>.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:configured_topology"></A><A NAME="795"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.14:</STRONG>
|
||
<SPAN CLASS="textit">Configured network topology</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="843" HEIGHT="707" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./simple_topology_configured.png"
|
||
ALT="Image simple_topology_configured"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
|
||
<H2><A NAME="SECTION00413000000000000000"></A>
|
||
<A NAME="sec:simulating_a_simple_network"></A>
|
||
<BR>
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">3</SPAN> Simulating a simple network
|
||
</H2>
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00413100000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">3</SPAN>.<SPAN CLASS="arabic">1</SPAN> Starting an experiment</A>
|
||
</H3>
|
||
After the network topology is completely built and properly configured, we will
|
||
start an experiment with the <SPAN CLASS="textit">Experiment <SPAN CLASS="MATH"><IMG
|
||
WIDTH="20" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="img1.png"
|
||
ALT="$\to$"></SPAN> Execute</SPAN> option from the
|
||
menubar and IMUNES will switch from the edit mode to the execute mode. In the
|
||
process of starting an experiment, IMUNES creates and configures the virtual
|
||
network. That will take a few seconds and all events during that process will
|
||
be shown in the statusbar placed at the bottom of the window.
|
||
|
||
<P>
|
||
<SPAN CLASS="textbf">NOTE:</SPAN> Although you can draw network topology on any system that
|
||
supports Tcl/Tk (Linux, FreeBSD, Windows, Mac OS X, Solaris), an experiment
|
||
can only be started on FreeBSD and Linux operating systems with root
|
||
permissions (Figure <A HREF="#fig:execute_windows">4.15</A> and Figure
|
||
<A HREF="#fig:execute_not_root">4.16</A>)!
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:execute_windows"></A><A NAME="796"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.15:</STRONG>
|
||
<SPAN CLASS="textit">Starting an experiment in Windows</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="412" HEIGHT="113" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./execute_windows.png"
|
||
ALT="Image execute_windows"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:execute_not_root"></A><A NAME="797"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.16:</STRONG>
|
||
<SPAN CLASS="textit">Starting an experiment in FreeBSD without root permissions</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV><IMG
|
||
WIDTH="380" HEIGHT="137" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./execute_not_root.png"
|
||
ALT="Image execute_not_root"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
In addition to configured parameters, each node will be set with the loopback
|
||
interface, a router will have the kernel forwarding enabled, and a host node
|
||
will have portmap and inetd started.
|
||
|
||
<P>
|
||
Information about the time spent instantiating the network topology is shown in
|
||
the statusbar (Figure <A HREF="#fig:statusbar_execute">4.17</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:statusbar_execute"></A><A NAME="798"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.17:</STRONG>
|
||
<SPAN CLASS="textit">Message about the instantiation of the network topology</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="869" HEIGHT="19" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./statusbar3.png"
|
||
ALT="Image statusbar3"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
In the right corner of the statusbar you can also see that IMUNES now works in
|
||
the execute mode, as well as experiment unique identifier.
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00413200000000000000"></A>
|
||
<A NAME="sec:NodeandLinkMenuOptions"></A>
|
||
<BR>
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">3</SPAN>.<SPAN CLASS="arabic">2</SPAN> Options from the node and the link menu
|
||
</H3>
|
||
To open the node menu in the execute mode right click on the node. Note that
|
||
the menu in the execute mode is different from the menu in the edit mode. It
|
||
offers the possibility to select the node connected to this node (<SPAN CLASS="textit">Select
|
||
adjacent</SPAN>), to see the current configuration (<SPAN CLASS="textit">Configure</SPAN>), to <SPAN CLASS="textit">Start
|
||
/ Stop / Restart</SPAN> the network element, to start / stop / restart any of the
|
||
possible <SPAN CLASS="textit">Services</SPAN> or to <SPAN CLASS="textit">Import Running Configuration</SPAN> from the
|
||
<SPAN CLASS="textit">Settings</SPAN> menu. The <SPAN CLASS="textit">Import Running Configuration</SPAN> option copies the
|
||
current MTU value and IPv4/IPv6 addresses from the running node to its
|
||
configuration. It is also possible to open the <SPAN CLASS="textit">Shell window</SPAN> (X terminal
|
||
with a Unix shell), <SPAN CLASS="textit">Wireshark</SPAN> or <SPAN CLASS="textit">tcpdump</SPAN> network sniffers on any
|
||
of the interfaces, <SPAN CLASS="textit">Firefox</SPAN> <SPAN CLASS="textit">Web Browser</SPAN> or a <SPAN CLASS="textit">Mail client</SPAN>.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:execute_menu"></A><A NAME="799"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.18:</STRONG>
|
||
<SPAN CLASS="textit">Network-layer node menu in the execute mode</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="178" HEIGHT="303" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./execute_menu.png"
|
||
ALT="Image execute_menu"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
Note that both the node and the link menu in the execute menu offer the
|
||
possibility to open the configuration window (<SPAN CLASS="textit">Configure</SPAN> label).
|
||
|
||
<P>
|
||
From the node configuration window in the execute mode it is possible to change
|
||
only the node name. Other node parameters such as link layer interface
|
||
parameters, network interface parameters and routing parameters can be changed
|
||
from the shell window on each node. To change those parameters from the node
|
||
configuration window, stop the node (using the <SPAN CLASS="textit">Stop</SPAN> label), change
|
||
parameters and then start the node agin (using the <SPAN CLASS="textit">Start</SPAN> label).
|
||
|
||
<P>
|
||
On the other side, from the link configuration window in the execute mode it is
|
||
possible to change the following link parameters: link bandwidth, the
|
||
propagation delay, the bit error rate and the probability of package
|
||
duplication. It is also possible to change display properties: the link
|
||
width and the link color.
|
||
|
||
<P>
|
||
We will now check if the virtual network topology is properly configured. Open
|
||
the shell window (e.g. <SPAN CLASS="textit">Shell window</SPAN> <SPAN CLASS="MATH"><IMG
|
||
WIDTH="20" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="img1.png"
|
||
ALT="$\to$"></SPAN> <SPAN CLASS="textit">csh</SPAN> or simply double
|
||
click on the node) on the network element (e.g. <SPAN CLASS="textit">office-pc1</SPAN>).
|
||
|
||
<UL>
|
||
<LI>To check the network interface eth0 parameters type the following
|
||
command: <TT>ifconfig eth0</TT>. The result is shown in Figure
|
||
<A HREF="#fig:pc_ifconfig">4.19</A>.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:pc_ifconfig"></A><A NAME="800"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.19:</STRONG>
|
||
<SPAN CLASS="textit">Shell window on office-pc1, network interface parameters</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="505" HEIGHT="166" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./pc_ifconfig.png"
|
||
ALT="Image pc_ifconfig"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
</LI>
|
||
<LI>To check static routes type the following command: <TT>netstat -nrf
|
||
inet</TT>. The result is shown in Figure <A HREF="#fig:pc_netstat">4.20</A>.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:pc_netstat"></A><A NAME="801"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.20:</STRONG>
|
||
<SPAN CLASS="textit">Shell window on office-pc1, static routes</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="505" HEIGHT="166" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./pc_netstat.png"
|
||
ALT="Image pc_netstat"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
</LI>
|
||
<LI>To test if a particular network element is reachable (e.g
|
||
<SPAN CLASS="textit">office-host</SPAN>) type the following command: <TT>ping 192.168.2.5</TT>. The
|
||
result is shown in Figure <A HREF="#fig:pc_ping">4.21</A>. To stop transmitting packets press
|
||
<SPAN CLASS="textit">Control-C</SPAN> keyboard button.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:pc_ping"></A><A NAME="802"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.21:</STRONG>
|
||
<SPAN CLASS="textit">Shell window on office-pc1, pinging office-host</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="505" HEIGHT="166" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./pc_ping.png"
|
||
ALT="Image pc_ping"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
</LI>
|
||
</UL>
|
||
|
||
<P>
|
||
We will test delay on the link between <SPAN CLASS="textit">office-switch</SPAN> and
|
||
<SPAN CLASS="textit">office-router</SPAN>, which is set to 30000 <SPAN CLASS="MATH"><IMG
|
||
WIDTH="13" HEIGHT="29" ALIGN="MIDDLE" BORDER="0"
|
||
SRC="img2.png"
|
||
ALT="$\mu$"></SPAN>s (30 ms), by using the
|
||
<SPAN CLASS="textit">traceroute</SPAN> tool:
|
||
|
||
<UL>
|
||
<LI>In the shell window on <SPAN CLASS="textit">office-pc1</SPAN> type the following command:
|
||
<BR><TT>traceroute 192.168.1.1</TT>. The result is shown in Figure
|
||
<A HREF="#fig:pc_traceroute">4.22</A>.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:pc_traceroute"></A><A NAME="803"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.22:</STRONG>
|
||
<SPAN CLASS="textit">Shell window on office-pc1, traceroute to office-router</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="505" HEIGHT="90" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./pc_traceroute.png"
|
||
ALT="Image pc_traceroute"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
</LI>
|
||
<LI>In the shell window on <SPAN CLASS="textit">office-host</SPAN> type the following command:
|
||
<BR><TT>traceroute 192.168.2.1</TT>. The result is shown in Figure
|
||
<A HREF="#fig:host_traceroute">4.23</A>.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:host_traceroute"></A><A NAME="804"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.23:</STRONG>
|
||
<SPAN CLASS="textit">Shell window on office-host, traceroute to office-router</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="505" HEIGHT="90" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./host_traceroute.png"
|
||
ALT="Image host_traceroute"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
</LI>
|
||
</UL>
|
||
|
||
<P>
|
||
|
||
<H3><A NAME="SECTION00413300000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">1</SPAN>.<SPAN CLASS="arabic">3</SPAN>.<SPAN CLASS="arabic">3</SPAN> Terminating an experiment</A>
|
||
</H3>
|
||
To terminate an experiment and switch from the execute mode to the edit mode
|
||
use the <SPAN CLASS="textit">Experiment <SPAN CLASS="MATH"><IMG
|
||
WIDTH="20" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="img1.png"
|
||
ALT="$\to$"></SPAN> Execute</SPAN> option from the menubar. During the
|
||
termination process, IMUNES will terminate active services on each node and
|
||
shut down all network elements (links and nodes with both virtual and physical
|
||
interfaces). The termination is finished when the message about the successful
|
||
cleanup shows up in the statusbar (Figure <A HREF="#fig:statusbar4">4.24</A>).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:statusbar4"></A><A NAME="805"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.24:</STRONG>
|
||
<SPAN CLASS="textit">Message about the successful cleanup</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="771" HEIGHT="19" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./statusbar4.png"
|
||
ALT="Image statusbar4"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
|
||
<H1><A NAME="SECTION00420000000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">2</SPAN> Configuration files management</A>
|
||
</H1>
|
||
|
||
<P>
|
||
|
||
<H2><A NAME="SECTION00421000000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">1</SPAN> Saving a virtual network configuration</A>
|
||
</H2>
|
||
|
||
<P>
|
||
After the virtual network is successfully built, configured and tested, it can
|
||
be saved with <SPAN CLASS="textit">File <SPAN CLASS="MATH"><IMG
|
||
WIDTH="20" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="img1.png"
|
||
ALT="$\to$"></SPAN> Save</SPAN> or <SPAN CLASS="textit">File <SPAN CLASS="MATH"><IMG
|
||
WIDTH="20" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="img1.png"
|
||
ALT="$\to$"></SPAN> Save As</SPAN> options from
|
||
the menubar. The virtual network topology is saved in IMUNES network
|
||
configuration file format (.imn).
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:file_save"></A><A NAME="806"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.25:</STRONG>
|
||
<SPAN CLASS="textit">File Save dialog</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="441" HEIGHT="286" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./file_save.png"
|
||
ALT="Image file_save"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
The structure of the configuration file is simple and suitable for changing
|
||
with a text editor (see Appendix <A HREF="node8.html#sec:IMUNESNetworkConfigurationFile">8</A>).
|
||
|
||
<P>
|
||
|
||
<H2><A NAME="SECTION00422000000000000000">
|
||
<SPAN CLASS="arabic">4</SPAN>.<SPAN CLASS="arabic">2</SPAN>.<SPAN CLASS="arabic">2</SPAN> Opening a virtual network configuration</A>
|
||
</H2>
|
||
To open an existing IMUNES network configuration file use the <SPAN CLASS="textit">File <SPAN CLASS="MATH"><IMG
|
||
WIDTH="20" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="img1.png"
|
||
ALT="$\to$"></SPAN>
|
||
Open</SPAN> option from the menubar and select it from the invoked <SPAN CLASS="textit">File Open</SPAN>
|
||
dialog.
|
||
|
||
<P>
|
||
|
||
<DIV ALIGN="CENTER"><A NAME="fig:file_open"></A><A NAME="807"></A>
|
||
<TABLE>
|
||
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 4.26:</STRONG>
|
||
<SPAN CLASS="textit">File Open dialog</SPAN></CAPTION>
|
||
<TR><TD>
|
||
<DIV ALIGN="CENTER">
|
||
|
||
</DIV>
|
||
<BR>
|
||
<BR>
|
||
<IMG
|
||
WIDTH="441" HEIGHT="286" ALIGN="BOTTOM" BORDER="0"
|
||
SRC="./file_open.png"
|
||
ALT="Image file_open"></TD></TR>
|
||
</TABLE>
|
||
</DIV>
|
||
|
||
<P>
|
||
The other way to open an imn file is to start IMUNES with that file as an
|
||
argument: <TT>imunes simple-topology.imn</TT>
|
||
|
||
<DIV CLASS="navigation"><HR>
|
||
<!--Navigation Panel-->
|
||
<A NAME="tex2html268"
|
||
HREF="node5.html">
|
||
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next"
|
||
SRC="next.png"></A>
|
||
<A NAME="tex2html266"
|
||
HREF="html_document.html">
|
||
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up"
|
||
SRC="up.png"></A>
|
||
<A NAME="tex2html260"
|
||
HREF="node3.html">
|
||
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous"
|
||
SRC="prev.png"></A>
|
||
<BR>
|
||
<B> Next:</B> <A NAME="tex2html269"
|
||
HREF="node5.html">5. Advanced Usage</A>
|
||
<B> Up:</B> <A NAME="tex2html267"
|
||
HREF="html_document.html">IMUNES manual</A>
|
||
<B> Previous:</B> <A NAME="tex2html261"
|
||
HREF="node3.html">3. User Interface Layout</A></DIV>
|
||
<!--End of Navigation Panel-->
|
||
|
||
</BODY>
|
||
</HTML>
|
||
x<EFBFBD><EFBFBD><EFBFBD> c<><63><EFBFBD>c<EFBFBD><63><EFBFBD>E<1B>Uc<55> <1F> M O^partitionKey=%28http%2Cimunes.net%29,:http://imunes.net/dl/guide/node4.html necko:classified 1 strongly-framed 1 request-method GET response-head HTTP/1.0 200 OK
|
||
Date: Tue, 03 Jan 2023 08:20:12 GMT
|
||
Server: Apache/2.4.51 (FreeBSD) PHP/8.0.14
|
||
Last-Modified: Wed, 27 Oct 2021 13:02:43 GMT
|
||
ETag: "a57a-5cf5535b23a88"
|
||
Accept-Ranges: bytes
|
||
Content-Length: 42362
|
||
Content-Type: text/html
|
||
X-Cache: MISS from gatekeeper
|
||
Via: 1.0 gatekeeper (squid/3.1.4)
|
||
original-response-headers Date: Tue, 03 Jan 2023 08:20:12 GMT
|
||
Server: Apache/2.4.51 (FreeBSD) PHP/8.0.14
|
||
Last-Modified: Wed, 27 Oct 2021 13:02:43 GMT
|
||
ETag: "a57a-5cf5535b23a88"
|
||
Accept-Ranges: bytes
|
||
Content-Length: 42362
|
||
Content-Type: text/html
|
||
X-Cache: MISS from gatekeeper
|
||
Via: 1.0 gatekeeper (squid/3.1.4)
|
||
Proxy-Connection: keep-alive
|
||
ctid 1 uncompressed-len 0 net-response-time-onstart 118 net-response-time-onstop 208 <00>z |