Engineering Clinic

Today Session on
Wired Cum Wireless Networks using ns2.

You can watch the following lecture before understanding this lecture.
Watch Wireless Networks - https://www.youtube.com/watch?v=ws6kCbhdrWw
Watch Wired Networks -
https://www.youtube.com/watch?v=FS0jnfNCwBA
https://www.youtube.com/watch?v=1_KeTTFsrt0


Number of Wireles snodes is 7
Wired nodes - 2
Accesspoint or Base Stations - 2

Watch the full video for this example


this example is already avaialble in tcl/ex folder.
The same example I have taken but modified to my design...

How to generate Scenario and Traffic generation (connection Pattern)

To generate the connection pattern, here is the steps

Open the terminal and go to the folder
$] cd /home/pradeepkumar/ns-allinone-2.35/ns-2.35/indep-utils/cmu-scen-gen
and run this command
$] ns cbrgen.tcl -type tcp -nn 7 -seed 1 -mc 20 -rate 0.001 

for 7 nodes, type of traffic is TCP, random seed is 1, maximum connection is 20 and the rate is 1ms or 0.001 and the output is sent to tcpgen.tcl

n…

This post shows you the way to download, learn and watch source  codes and their working in ns3 and ns2.
Everyday thousands of visitor visits this blog and search for source code and explanation. Since 2011, the blog is delivering information across the globe.

Now this era is on Videos and online tutorials. nsnam is happily created a Video Channel called "Engineering Clinic" in Youtube and deliver video lectures with free source codes for all applications.

Subscribers of this blog are requested to subscribe to the video channel given below

https://www.youtube.com/tspradeepkumar 

Here are some Playlists that are important to the viewers of this blog.

NS2 Tutorials - https://www.youtube.com/watch?v=jRS0-hNk-Gw&list=PLX6MKaDw0naZBi0R-6_IAuYA9Yk_yuyXp

NS3 Tutorials - https://www.youtube.com/watch?v=LPOl81VIDG4&list=PLX6MKaDw0naZILVYjo8_quA4JI8Jz-idL

IoT Tutorials - https://www.youtube.com/watch?v=MRTJdC4ye9A&list=PLX6MKaDw0nab-VNTAfQkFAtl2zSv-N08N

MOODLE Tutorials - …

FactorsDC MachineTransformersInduction MachinesSynchronous MachinesOutput EquationPa=CoD2Ln, where Pa=P/h for generators, Pa=P for motorsFor Single Phase
Q=2.22 f Bm Ai Kw Aw d10-3
For Three Phase
Q=3.33 f Bm Ai Kw Aw d 10-3Q=CoD2 L ns
KVA Input Q=
HP * 0.746 / Cos f * hQ=CoD2 L ns
KVA Input Q=
HP * 0.746 / Cos f * h
For Turbo alternators
Q=1.11Bavac KwsVa2 L 10-3/nsOutput CoefficientCo=Bav ac* 10-3where Bav-magnetic loading and ac - electric loadingDNACo=11 Kws Bav ac 10-3Co=11 Kws Bav ac 10-3Choice of Magnetic LoadingFlux Density in Teeth Frequency of Flux Reversals Size of machineDNAMagnetizing current, Flux Density, Iron lossIron loss, Stability, Voltage Rating, Parallel Operation, Transient ShortCircuit currentChoice of Electric LoadingTemperature rise,
speed of machine, Voltage, Armature reaction, CommutationDNAOverload Capacity, Copper losses, Temperature rise, Leakage ReactanceCopper loss, Synchronous reactance, Temperature rise, Stray Load losses,
Voltage rating Flux DensityYoke – 1.3 …

When Moodle is accessed either in Intranet or internet, there will not be any issue. But occasions when the MOODLE Site has to be accessed both in the intranet and in the Internet, here is a simple trick
Server Used: IBM Blade Servers
Operating system: Windows Server 2008
Moodle Version: 2.4
WAMP Server is used.
Number of Users: 3000 (Students) + 200 (Faculty)
Open the config.php from ~/moodle/config.php
include these lines
$CFG->wwwroot = 'http://'.$server_id.'/vitcc';
$CFG->dataroot  = 'C:\\wamp\\moodledata';
before the following line
$CFG->directorypermissions = 07xx;
Restart the WAMP Server and you can Check MOODLE Site both in Internet and Intranet.

The above Image tells the intranet Link and the internet link can be opened outside the campus network

IF you have a website that runs with an IP address and you decide to move it to a domain, then here is the clear step.  Also this post will be helpful to you if you are running a same website by two different IP Address (One in campus and another outside the campus)
Prerequisites:

Your IP Address (Example): 172.16.1.10/site (Internal IP)
Your IP Address (Example): 28.45.34.101/site (External IP)

You want to move it to: example.com (instead of example.com/site)

Step 1:
Open the file /opt/lampstack-5.5.31-0/apache/conf/bitnami/bitnami.conf
In the above file, Change these lines  (The bold lines are the changed ones)

<VirtualHost _default_:80>
DocumentRoot “/opt/lampstack-5.5.31-0/apache2/htdocs/site”
<Directory “/opt/lampstack-5.5.31-0/apache2/htdocs”>
Options Indexes FollowSymLinks
AllowOverride All
<IfVersion < 2.3 >
Order allow,deny
Allow from all
</IfVersion>
<IfVersion >= 2.3 >
Require all granted
</IfVersion>
</Directory>
to
<VirtualHost _default_:80…