Abstract : Internet Protocol version 6(Pv6) is the advanced version of the IPv4 protocol and both of these protocols are part of TCP/IP suite.TCP/IP is the only protocol for transmission of data over the internet As the internet is not secure place for transmission of secure and confidential information (packets) So to protect this information over the non secure channels(internet ) the IPSec was introduced .IPSec is the worldly know standard for the secure transmission over the internet . IPSec is mandatory for IPv6 and optional for IPv4 deployments .But as the IPsec provides authentication, confidentiality and integrity of the internet protocol (IP) packets but it slows down the transmission devices and where there is huge transmission of data like in Gbps at the backbone networks, the performance of the transmission devices is highly effected .
So to improve the transmission rate on high performance networks number of techniques have been used till now and these techniques are the valuable addition in the current technologies .Purpose of this paper is to high light , what types of techniques are available in the current time for improving the performance of the transmission devices both at the H/W and S/W level while applying the IPSec and what drawbacks in the already existing techniques .
Keywords: Internet Protocol Security (IPsec), IPv6 , Internet Security, Virtual Private Network(VPN) security ,IPsec for high performance networks.
Introduction :As in the current era the internet is widely used for sending and receiving information in a very fast way. As internet is not only used by the single user but huge companies (enterprises) use them for their business use . An enterprises may have their offices at different location within the same country or over the world. That’s why Enterprises uses the internet to send and receive information and share confidential documents over the internet .As it is very difficult and highly expensive to connect the remote locations of an enterprise through a dedicated transmission links. That’s why the enterprises use the internet for sending receiving Information to the remote offices, this network is called the Virtual Private Network(VPN).So the VPN is the encrypted solution of costly leased lines or private lines.
Currently two architecture are used in the world of networks, OSI model and TCP/IP model. But TCP/IP model is more famous than the OSI model due its practical implementation .TCP/IP model use uses TCP/IP protocol .As TCP/IP is the only transmission protocol for the transmission of data/information over the internet .TCP/IP model which consist of four layers.ie Application Layer, Transmission Layer, network Layer and Physical Layer . There are different protocols working at different layers of the model .As our study only concerns with the IPSec which is working at the layer 2 (network layer ) that’s why our focus is only network layer and Transmission unit at the network layer...