WAN Network Design with Redundancy

The project was intended to solve the commonplace problem related to network issues in corporates with single internet connection. Concepts of BGP Routing, EIGRP Routing, GLBP, SLB and Frame-Relay were used. The servers used were based on Linux (RHEL 6.0). Redundancy is created by two paths, one is IPv4-v6-IPv4 tunneling and other is normal BGP routing. Gateway Load Balancing Protocol (GLBP) is used to provide redundancy in this topology. 




The project was primarily undertaken to solve a commonplace problem faced by corporates which have a single internet connection, as a result, if a snag occurs in the internet the complete connectivity collapses. To ensure that this does not happen in my project, I simulated an organization with dual internet connections as a result, whenever one connection becomes down the other would replace it. Thereby allowing the work to proceed without a break. This would prove useful to all the corporates as in today`s world a break in connectivity even for a single moment could result in drastic losses. For instance in banks, research centres etc. This project has also helped me to depict redundancy of Linux servers, such as Apache etc. As the site is on both the servers, even if one server becomes down the site is unaffected.

In this topology there are 6 routers, 1 frame-relay switch, 5 ethernet switches and 2 linux servers. On router R1 server load balancing (SLB) is done with the help of two linux severs, which are on VMWare and are connected via cloud to GNS3. Router R1 is connected to router R2 as well as router R6 via Frame-relay switch FR1. Amidst these three routers EIGRP routing is running with AS number 10. In one path way router R6 is connected to router R3 and between the two there is IPv4-v6-IPv4 tunneling. While on the other path, router R2 is connected to R4. In both the connections, BGP routing is running. On router R6 and router R2 redistribution of BGP with EIGRP is done. Router R4, R3 and R5 are connected through switch SW1 and between them Gateway Load Balancing Protocol (GLBP) is running. And on router R5 a DHCP sever is configured, which is responsible for giving the IP address automatically. There are 3 hosts which are connected though switches and have different operating systems like windows xp, redhat linux and microcore linux. To conduct this experiment I used 7200 series router with IOS version 15.4. In this topology, I made servers on the RedHat Enterprise Linux 6 (RHEL 6), which is installed in VMWare Workstation 10 and connected to the GNS3 through cloud (which in itself is feature of GNS3).

Configuration file :- config.zip

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