International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 02 | Feb 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 29 IMPROVE REROUTING SCHEME TO MULTILINK FAILURE USING INTERFACE SPECIFIC ROUTING A. MICHAEL 1 , K. KALAI SELVI 2 1 PG Scholar, Dept. of Communication Systems, Govt. College of Engineering, Tirunelveli. 2 Assistant Professor, Dept. of Electronics and Communication Engineering, Govt. College of Engineering, Tirunelveli ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Link failures occur almost everyday in the internet. Due to both planned maintenance and unplanned events Such as cable cuts, optical layer faults, and other hardware/ Software bugs. Routing in the case of failures has became a hot topic in both academia and industry during the past Decade. Advanced fast rerouting approaches are developed to protect the routing against link failures. Instead of waiting for the routing protocol to converge, a fast rerouting approach can switch traffic to backup next hops or backup paths quickly. The existing system used a label based approach for multi link failure. This approach uses information that are carried by IP packets after failures occur. This means that modification to data packets are needed, such that extra information (labels) can be carried to indicate the existence of failures. However, fast rerouting faces the problem of efficiency, which has not been well addressed and the overhead is high, and topology constraints need to be met for the approaches to achieve a complete protection. In this project interface specific routing based on tunneling on demand (TOD) approach is proposed. This approach covers most failures with ISR and activates tunneling only when failures cannot be detoured around by ISR. In addition to this elliptic curve based diffie helman key exchange algorithm used to protect the data. Key Words: Multi-link failure, Fast rerouting, ISR, TOD, Diffie helman key. 1. INTRODUCTION A wireless network is a computer network that uses wireless data connections between network nodes. Wireless networking is a method by which homes, telecommunications networks and business installations avoid the costly process of introducing cables into a building or as a connection between various equipment locations. Wireless telecommunication networks are generally implemented and administered using radio communication. This implementation takes place at the physical level (layer) of the OSI model network structure. Examples of wirless networks include cell phonenetworks, wirelesslocalareanetworks (WLANs), wireless sensor networks, satellite communication networks, and terrestrial microwave networks. A wireless sensor network (WSN) is a wireless network consisting of spatially distributed autonomous devices using sensors to monitor physical or environmental conditions. A WSN system incorporates a gateway that provides wireless connectivity back to the wired world and distributed nodes. The wireless protocols you select depends on your application requirements. Some of the available standards include 2.4GHz radios based on either IEEE802.15.4 or IEEE 802.11(Wi-Fi) standards or proprietary radios, which are usually 900MHz. 1.1 Wireless Link Computers are very often connected to networks using wireless links, e.g. WLANs. Terrestrial microwave- Terrestrial microwave communication uses EARTH Based transmitters and receivers resembling satellite dishes. terrestrial microwave is in the low gigahertz range, which limits all communications to line-of-sight. Relay stations are spaced approximately 48km(30mi)apart.satelitescommunicate via microwave radio waves, which are not deflected by the Earth’s atmosphere. The satellites are stationed in space, typically in geosynchronous orbit 35,400 km (22,000 ml) above the equator. These Earth—orbiting systems are capable of receiving and relaying voice, data, and tv signals. cellular and pcs systems use several radio communications technologies-wireless local area networks use a high- frequency radio technology similar to digital cellular and a low -frequency radio technology. wireless LANs use spread spectrum technology to enable communication between multiple devices in a limited area. 1.2 Wireless LAN A wireless local area network (WLAN)links two or more devices over a short distance using a wireless distribution method, usually providing a connection through an access point for internet cassette use of spread-spectrum or OFDM technologies may allow users to move around within a local coverage area, and still remain connected to the network. WLAN standards are marketed under the wifi brand name. Fixed wireless technology implements point-to-point links between computers or networks at two locations, often using dedicated microwave or modulated laser light beams over line of sight paths.it is often used in cities to connect networks in two or more buildings without installing a wired link. 1.3 Wireless Ad hoc Network A Wireless ad hoc network, also known as a wireless mesh network or mobile ad hoc network (MANET), is