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Wednesday, June 04, 2008

GNS3- Graphical Cisco Router Emulator.

I found GNS3 is a very useful Cisco router and PIX firewall simulator. Please find the descriptions I copied from their website.

You can download the software from http://www.gns3.net

GNS3 is a graphical network simulator that allows you to design complex network topologies and to launch simulations on them.
To allow complete simulations, GNS3 is strongly linked with :

Dynamips, an IOS emulator which allows users to run IOS binary images from Cisco Systems.
Dynagen, a text-based front-end for Dynamips.
Pemu, a PIX emulator.
GNS3 is a excellent complementary tool to real labs for administrators of Cisco networks or people wanting to pass their CCNA, CCNP, CCIP or CCIE certifications.
It can also be used to experiment features of Cisco IOS or to check configurations that need to be deployed later on real routers. This project is an open source product that may be used on multiple platforms, including Windows, Linux, and MacOS X.
Features overview
Designing high quality complex network topologies.
Emulating Cisco routers and PIX firewalls.
Simulating simple Ethernet, ATM and Frame Relay switches.
Load and save in Dynagen's INI-like format.
Image export (JPEG, PNG, BMP and XPM).

Monday, June 02, 2008

Leaders Should Know to Manage Failures

Nice article.

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Former President of India, APJ Abdul Kalam while addressing an audience at Wharton India Economic forum, was asked to give an example, from his experience, as how leaders should manage failure and his reply was as follows;

"Let me tell you about my experience. In 1973 I became the project director of India’s satellite launch vehicle program, commonly called the SLV-3. Our goal was to put India’s “Rohini” satellite into orbit by 1980. I was given funds and human resources — but was told clearly that by 1980 we had to launch the satellite into space. Thousands of people worked together in scientific and technical teams towards that goal.

By 1979 — I think the month was August — we thought we were ready. As the project director, I went to the control center for the launch. At four minutes before the satellite launch, the computer began to go through the checklist of items that needed to be checked. One minute later, the computer program put the launch on hold; the display showed that some control components were not in order. My experts — I had four or five of them with me — told me not to worry; they had done their calculations and there was enough reserve fuel. So I bypassed the computer, switched to manual mode, and launched the rocket. In the first stage, everything worked fine. In the second stage, a problem developed. Instead of the satellite going into orbit, the whole rocket system plunged into the Bay of Bengal. It was a big failure.

That day, the chairman of the Indian Space Research Organization, Prof. Satish Dhawan, had called a press conference. The launch was at 7:00 am, and the press conference — where journalists from around the world were present — was at 7:45 am at ISRO’s satellite launch range in Sriharikota [in Andhra Pradesh in southern India]. Prof. Dhawan, the leader of the organization, conducted the press conference himself. He took responsibility for the failure — he said that the team had worked very hard, but that it needed more technological support. He assured the media that in another year, the team would definitely succeed. Now, I was the project director, and it was my failure, but instead, he took responsibility for the failure as chairman of the organization.

The next year, in July 1980, we tried again to launch the satellite — and this time we succeeded. The whole nation was jubilant. Again, there was a press conference. Prof. Dhawan called me aside and told me, “You conduct the press conference today.”

I learned a very important lesson that day. When failure occurred, the leader of the organization owned that failure. When success came, he gave it to his team. The best management lesson I have learned did not come to me from reading a book; it came from that experience