Router Configuration, Ethernet Switching Router, Cisco ASA, DHCP and IP Configuration in GNS3

Table of Contents
Router configuration....................................................................................................................................2
Availability of router configuration.............................................................................................................4
Ethernet switching router.............................................................................................................................5
Cisco ASA...................................................................................................................................................7
ASA installation..........................................................................................................................................7
DHCP configuration....................................................................................................................................9
IP configuration.........................................................................................................................................10
Usage of wire shark...................................................................................................................................11
Final network topology..............................................................................................................................12
References.................................................................................................................................................13

GNS3
GNS is known as graphical network simulator and it works as a platform used to make a
network design. And for that network design it uses the network devices known as routers and
switches. And it uses the devices as real time devices and also in the kind of virtual devices. And
this design is very complex to understand for the user. And it is running by the use of Cisco IOS.
And we can use the function of operating system by the usage of virtual box and gns3. And these
two works as a platform. And in that gns3 it had the function in the way of dynagen. And it use
as a graphical front development in the gns3. And in this IOS commands are used by the usage
of gns3 platform. And in the gns3 it had many features by the use of Cisco. And the gns3 it had
routers to the development of increasing the throughput.
Router configuration
In GSM3 the first step is router configuration. First we need to download the router IOS
image files from browser. All the downloaded IOS images are stored in our system. Next step is
open GSM3; in GSM3 we are using some network topologies and this network topology contains
three different types of routers. The following window represents the basic router configuration
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The above window is just a basic router connection, the switch is used for establish the
connection between these two routers. So we need to download the switch configuration also.
Next step is starting the router. Each router is run separately. Right click the first router then
click the start option, the green color button is available in the menu just click the button then
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the router will be started. After that the red circle is changed to green circle. Then we need to
check the router it’s available or not. So again right click the first router but this time click the
console option, and chance their appearance. Click next, the command window is open. Enter the
command configure terminal for start the execution, command window shows that, the R1 router
is available or not.
Availability of router configuration
The following windows are representing the availability of router one and router three.
First window represent the router one features.
And the second wondow shows the R2 router availability.
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