What is BGP Border Gateway Protocol

BGP stands for "border gateway protocol". BGP is protocol of internet, ISPs used this protocol for routing. BGP belongs to EGP(exterior gateway protocol). There are two types of protocol i.e. EGP and IGP.
IGP (Interior gateway protocol) made the network to work in an organization where as EGP is used for communicating two AS (autonomous systems). In start EGP is himself a protocol, now this become a category.

BGP Facts:

  • BGP have Multihoming and use shortest path among the two or more ISPs
  • BGP runs on top of TCP (port 179)
  • BGP updates are triggered, only change is send to neighbours not the whole routing table
  • BGP routing table can be of >100 MB
BGP Routing Algorithms:  

BGP is technically a distance vector protocol, but mostly call it a path vector protocol. Without tuning  BDP behaves just like RIP, use hop-count for shortest path but hope-count in this case is a AS or ISP

BGP Tables:
 Three tables in BGP that are as follow:

  1. Neighbour Table: The directly connect BGP friends.
  2. BGP Table: A list of all GBP routes this can be big.
  3. Routing Table: Contain the best Path.
Learn More About by visiting this article: BGP Interview Questions for network Job

GNS3 Installation on Ubuntu 11.04 | Network Simulator for Ubuntu

There are some different ways to install softwares and packages for Ubuntu, you can install software by console interface. But in this post i am using an easy way to install GNS3 on Ubuntu 11.04.

First open Ubuntu Software Center from Application\Ubuntu Software Center and click on "get software" tab and type gns3 and press search button.
In search result you will find "gns3 Graphical Network Simulator" click on install button. Then it will ask you for administrator password, type tour password.
After this installation process will start which will take a few minutes to complete.

After the successful installation you can run GNS3 from Application\Accessories\GNS3. You can see installation process video on you tube by clicking this link: Easy way to install gns3 on ubuntu 11.04


How to install flash player on Ubuntu 11.04 | Linux software install

In this post i will show you that how to install flash plugin for Ubuntu 11.04. There are some other ways to install the software on Ubuntu but i am using a very easy way to install flash plugin on Ubuntu.

  • First click on application\ Ubuntu software center, which will open the add and remove software utility for Ubuntu.

  •  Then click on get software and in search field type key word "flash plugin". Select your required flash player as i am selecting flash player for Mozilla. Click on install button, then it will ask you to enter your administrative log in password and installation process will start.

  •  This may take a few minutes and after the installation you can verify this by clicking on "Installed Software" button, there you will find the flash plugin software.

Ubuntu Virtualization | Installation of ubuntu-11.04 on Vmware with Windows 7

What is Virtualization:

Virtualization is trend that is swaping IT envirment and adding virtual machines in our data centers. According to one report there are more than 6 mission intel servers in data centers all over the world. These server are running only one application and one operating system at a time.  These are high cost solution for IT organization. Average utlization of each server is 6-12 %.
By Virtualization tecnology you can run multiple applications and OS on single server Hardware. Each virtual  OS have its own CPU including its own Memory Disk storage and Ethernet. 

Ubuntu11.04 on Vmware
Vmware is best virtualization software for ubuntu. Today i will show you that how to install Ubuntu 11.4 on Vmware with windows 7. Installing Ubuntu on vmware is a piece of cake. You need to just follow the simple steps. 

  • First you need a Ubuntu 11.4 DVD or ISO image file. 
  • Start Vmware 7 and click on new virtual machine, give name to new VM machine and then this wizard will asked you to identify the Ubuntu image and RAM and disk storage. I select the 512 RAM and 20GB disk, you can define yours.
  • Complete this wizard and start your VM. Ubuntu booting process will start.
  • Then select your language.

  • After this Ubuntu 11.4 installation process is start.

  • This installation process will take 20-30 minutes to complete and after this a log in screen will appear click on login icon and enjoy the beautiful interface of Ubuntu Linux OS.