【正文】 unction registered will carry out the task of creating a virtual interface and con?guring a tunnel data structure with the newly created device. The tunnel parameters can be stored in the private data structure of the interface. Once the device is created then a route for the destination can be associated with the device so that the packets can be diverted to this interface. The transmission function can then systematically encapsulate the packets using the information stored in the tunnel’s private data structure (Fig. 2). The call back function after registering the device can then return a verdict of NF_ACCEPT so that the packet returns to the work stack. The routing decision is then made in the kernel diverting the packets to the previously created route. A user space daemon in the IPv6 domain is deployed to municate the need of establishing a tunnel at the IPv4 destination, or the border router if the destination is in IPv4 domain. For reception of such tunneled packets a new protocol called IPIP protocol (value 4) is registered with the kernel. This registration process involves specifying functions for processing such tunneled packets and generating error messages (ICMP messages). The receiving function then removes the IPv6 header and simulates another reception process where this time an IPv4 packet is received and the parameters for virtual interface are adjusted so that the reception of IPv4 packets is simulated through the virtual device. 6. Performance . Latency In evaluating the performance of the tunnelingbased mechanism the average transmission latency (Tsuchiya et al., 2020。 Ipv6 1. Introduction The initial deployment of IPv6 (Davies, 2020) will require a tightly coupled use of IPv4 addresses to support the interoperation of IPv6 and IPv4 within an IPv6only Network (Dunn, 2020). Nodes will still need to municate with IPv4 nodes that do not have a dual IP layer supporting both IPv4 and IPv6. The mechanism proposed is based on the use Corresponding author. Tel.:+ 912332301327。 accepted 28 June 2020 Abstract: IPv4 to IPv6 transition is an inevitable process when deploying IPv6 works within the present IPv4 Inter. The two protocols are expected to coexist for a number of years during the transition period. A number of transition techniques exist to address the various needs of different works. One of them is tunneling mechanism. Tunneling means encapsulation of one protocol into another one so that the encapsulated protocol is send as payload on the work. In this paper, a scheme is presented for tunneling of IPv4 packets in IPv6 packets. This scheme will be useful in the future when most of the works would be converted into IPv6 works involving minimum IPv4 routing. This technique, coupled with the dual stack approach, enables IPv4 applications to run and interact with other IPv4 applications in both IPv4 and IPv6 work environments without any modi?cation and repilation, and without NAT, nor any application proxy or gateway. r 2020 Published by Elsevier Ltd. Keywords: Network。 參考文獻 Af??, H., Tountain, L., ENST Bretagne, Methods for IPv4IPv6 Transition. IEEE 1999. Bound, J., Tountain, L., Af??, H., Dupont, F., Durand, A., dual stack transition mechanism (DSTM) Inter draft (draftietfngtrans ) 2020. Chakeres, ., AODVUCSB Implementation, University of California Santa Barbara. / Davies, J., Introduction to IP version 6 Microsoft Press, February 2020. Dunn, T., The IPv6 transition. IEEE Inter Comput 2020. Kitamura, H., Jinzaki, A., Kobayashi, S., A socks based IPv6/IPv4 gateway mechanism Inter Draft ‘‘draftietf ’’ 2020. Net?lter homepage / Nordmark, E., Stateless IP/ICMP translator algorithm (SIIT). RFC2765 February 2020. Raicu, I., Zeadally, S., Evalating IPv4 to IPv6 transition mechanisms. IEEE September 2020. Srisuresh, P., Holdrege, M., IP work address translator (NAT) terminology and considerations. RFC2663 August 1999. Tsuchiya, K, Higuchi H., Atarashi, Y., Dual stack hosts using the bump in the stack technique, RFC2767 February 2020. Tsirtsis, G., Srisuresh, P., Network address translationprotocol translation (NATPT). RFC2766, February 2020. Waddington, D., Chang, F., Realizing the transition to IPv6. IEEE Comm Mag 2020. Wang, K., Yeo, ., Ananda, ., DTTS: a transparent and scalable solution for IPv4 to IPv6 transition Proceedings of the tenth international conference on puter munication and works, IEEE 2020. 1 Journal of Network and Computer Applications 31 (200 8) 66–72 .else Research note Design and implementation scheme for deploying IPv4 over IPv6 tunnel Tushar M. Raste , . Kulkarni Department of Computer Science and Engineering, Walchand College of Engineering,Sangli, India