Isuru's Blog

In this year I started following the Master of Computer Science ( MCS ) at University of Colombo School of Computing and these days I'm following a module named "Advanced Concepts in Data Communication Networks" The lecturer asked us to install a program called NS-2 and to play around with it as we will get an assignment on it soon! As usual when I hear a new name, I just  googled for it and found the official website:  http://www.isi.edu/nsnam/ns/ What is NS-2? NS-2 is a Network Simulator. According to Wikipedia, NS-2  is a "discrete event network simulator" and the latest available version as of now is NS-3, which is available at  http://www.nsnam.org/ The difference between NS-2 and NS-3 The FAQ at www.nsnam.org clearly mentions the difference between NS-2 and NS-3. NS-3 is a new software development effort and uses C++ programs or python scripts to define simulations. However NS-2 uses OTcl for scripts.  So the most i...

In my previous post , I explained how to install OpenStack in Multi-Node environment with DevStack. If you want to install the OpenStack in a Single Machine, you can follow the same steps for the Controller Node Installation in my previous post. You can omit the "MULTI_HOST=1" line from the localrc. For example, following is a "localrc" configuration used to install OpenStack in a single machine. HOST_IP=10.100.0.29 FLAT_INTERFACE=eth0 FIXED_RANGE=192.168.17.0/25 FIXED_NETWORK_SIZE=126 FLOATING_RANGE=10.100.0.64/28 ADMIN_PASSWORD=labstack MYSQL_PASSWORD=root RABBIT_PASSWORD=rabbitmq SERVICE_PASSWORD=supersecrete SERVICE_TOKEN=token