# Introduction he Internet is growing throughout the world, and different kinds of devices are becoming part of the internet every day. IP (Internet Protocol) is the most used routing protocol for communication over the network .The data packets are selecting the path of routing which mainly depends on the devices attached to the network. Packet destination address (IP) must be known from one device to another so that they can easily communicate with each other also wanted the neighboring devices information. Network topology studies the path for that region we can use OSPF technique. IPv4 and IPv6 are two categories of internet protocol. The IPv6 protocols represent an advance version of the IPv4 (Oliveira, De Sousa, et al. 2011). IPv6 uses 128 bits addressing scheme which is more complicated than IPv4. IPv4 provides 32-bit addressing space in which 4.3 billion internet protocol address (Hinds, Atojoko, et al. 2013). A study report shows that (10-15) % IPv6 replaces IPv4 around the world after 25 years later (I.v. Beijnum. 2016) V. # Topology Simulation for OSPFv3 Now, we considered the model of the network for OSPFv3 that contains three routers, two switches, four computers (mainly, end devices) for using the establish connection among routers. The automatic and connection between switch to end devices. The network model gives below: 6. Router OSPFv3 '1' the '1' gives the area 0 which same for all router in the same domain. In IPv6 router-id is manually set up for the domain and area specification. But it can be any number. VII. # Exiting Configuration of ospfv3 with ipv6 The model of the network that is implemented and verified using 'ping' command from any pc's that attached to the router. Now, the result shows below are using the pc0 and pc1 through pinging the address to another. Now, show in the below: # Data Collection Ping command is used to check the configuration results in different routing protocols. Fig. 2 shows the small network model design for OSPFv3 in IPv6 protocol and packet transfer calculated for the time taken by it to travel from sender to receiver node. These data obtained by ping command and the traffic generator using the simulation for auto/capture/play button. It mainly shows the time to travel and reach the packets from source to destination nodes. Now Fig. 12 shows the simulation mode of cisco packet tracer environment for OSPFv3 in IPv6 protocol. # Data Analysis The simulation process which indicates the impact of the traffic sent and received in the network. It generates through a ping command method from pc0 to pc1 which shows the connectivity, justification, testing, and transfer of the packet from source to destination. It also verified the simulation and packet transfer time with the observed parameters is checked from pc0 and pc1 with constant delay and without constant delay which constructed from the simulation time. The graph shows the simulation time vary from node to node when a packet travels through the network and finally the IPv6 network finds out the performance of the routing protocol OSPFv3. # X. # Conclusion This paper demonstrated that Cisco tracer could be used by network planners to select and to design various networks and optimal routing topology. In a network, routing is used to trace the path. In this paper, we used cisco packet tracer for implementing a routing protocol. We use OSPFv3 routing protocol in IPv6 network due to the usage and area of necessity though there are many different types of routing techniques. OSPFv3 are used for small and large enterprises and other business organization for IPv6 network environment. The time zone (second) in each station mainly packet take to travel one station to another, check the destination address to plot these generated time zone to show how fast data packet flows through a network of OSPFv3 in IPv6 environment with and without constant delay. It used for security, unlimited hop count, low overload, authentication. OSPFv3 uses area concepts which mainly eases management, route and packet traffic control. ![Global Journal of Computer Science and Technology Volume XIX Issue II Version I changes essentially operating an IPv6 network. OSPFv3 interfaces and are establishing neighbourship using an IP subnet mask. To establish adjacencies OSPFv3 uses link-local addresses. In OSPFv3 HELLO packet structure has been changed because of IPv6 (Anibrika, Ashigbi, et al.2016).OSPFv3 provides security mechanisms for protecting routing update. IPv6 environment gets these services through IPsec. IV. Packet Tracer Training, Education, and Research for computer network simulations can utilize through packet tracer which is Cisco router simulator. The tool creates Cisco systems. It provides free for distribution to faculty, alumni and students who participate in the Cisco networking academy. Users can create of visualizations animation and simulations of networking phenomena to use packet tracer. The tool of packet tracer relies on a specific simple model of networking device and protocols for simulation. Simulation is processed by different kinds of networking devices like as routers, switches, and wireless access points. Computers and various end devices visualize with animations. It is easy learning. It also offers students and teachers a tool for learning networking environment.](image-2.png "T") 236![Fig. 2: OSPFv3 network model for simulation](image-3.png "Fig. 2 :Fig. 3 :Fig. 6 :") 8910![Fig. 8: Area defining and manually configure router 0 in OSPFv3](image-4.png "Fig. 8 :Fig. 9 :Fig. 10 :") 11![Fig. 11: Checking result using 'ping' command. VIII.](image-5.png "Fig. 11 :") 12![Fig. 12: Simulation environment for data collection of OSPFv3 in IPv6 network](image-6.png "Fig. 12 :") ![Journal of Computer Science and Technology Volume XIX Issue II Version I Journals Study and Optimized Simulation of OSPFv3 Routing Protocol in IPv6 Network](image-7.png "Global") 2![pc0 to pc1 while taken to travel OSPFv3 in IPv6 routing protocol and reference message with the constant delay that is ICMPv6](image-8.png "Table 2 :") II.Routing ProtocolIPv6:IETF (Internet Engineering Task Force) in 1990designed IPv6 protocol (S.E.Decring and R.Hinden1998). IPv6 makes use of 128-bit addresses and so thenext address space supports 2^128 addresses(Hui and Thubert 2011). The 128-bit addressessubdivide into eight groups. Further four digitshexadecimal number divide among eight groups andseparate in colons. The resulting representation ofhexadecimal is called colon-hexadecimal (Sarma 2015).It makes of 128 bits, the IPv6 address subdivides intoeight 16-bits blocks. 4-digit hexadecimal numberscontain each block and each block separates by acolon (Nisha Devi, Er.Brijbhushansharma, et al.2016).Types of IPv6 addresses are Multicast addresses,Anycast address and Unicast address. Now, Multicastaddress format of IPv6 shows below in bits:844112Fig. 1: Multicast Address Format of IPv6 (128 bits)III.OSPF(Open Shortest Path First)OSPFv3:For IPv6 environment, OSPFv3 has beendesigned. It follows the shortest path first algorithm andOSPFv3 is a dynamic routing protocol (R.Coltun,O.Fergusonet al.2008). OSPFv3 incorporates somecontains packet header. 1Time(sec)Last DeviceAt DeviceType0.001PC 0Switch 0ICMPv60.003Switch 0Router 0ICMPv60.007Router 0Router 1ICMPv60.010Router 1Router 2ICMPv60.013Router 2Switch 1ICMPv60.015Switch 1PC 1ICMPv60.016PC 1Switch 1ICMPv60.018Switch 1Router 2ICMPv60.021Router 2Router 1ICMPv60.023Router 1Router 0ICMPv60.025Router 0Switch 0ICMPv60.027Switch 0PC 0ICMPv6Time(sec)Last DeviceAt DeviceType0.001PC 0Switch 0ICMPv60.002Switch 0Router 0ICMPv60.003Router 0Router 1ICMPv60.004Router 1Router 2ICMPv60.005Router 2Switch 1ICMPv60.006Switch 1PC 1ICMPv60.007PC 1Switch 1ICMPv60.008Switch 1Router 2ICMPv60.009Router 2Router 1ICMPv60.010Router 1Router 0ICMPv60.011Router 0Switch 0ICMPv60.012Switch 0PC 0ICMPv6Graph 1: Comparison figure of the OSPFv3 routingprotocol in IPv6 with time zone (from table 1, 2) andtravels the stations during packet transfer with constantdelay and without constant delayIX. © 2019 Global JournalsStudy and Optimized Simulation of OSPFv3 Routing Protocol in IPv6 Network * GujarathiThrivikram "Study Simulation Ospf Routing Protocol Cisco Tracer International Journal of Emerging Trends & Technology in Computer Science (IJETTCS) 2278-6856 5 2 March-April 2016 * Optimized Routing Information Exchange in Hybrid IPv4-IPv6 Network using OSPFV3 & EIGRPv6 ZeeshanAshraf YousafRiphah IJACSA) International Journal of Advanced Computer Science and Applications 8 4 2017 * Performance Analysis Anibrika Bright Selorm Kodzo1, MustaphaAdamu Mohammed2, Ashigbi Franklin Degadzor3, Dr. Michael Asante4 * Survey on the RIP, OSPF, EIGRP Routing Protocols VVetriselvan PRPatil International Journal of Computer Science and Information Technologies 5 2 2014 * Network performance evaluation for RIP, OSPF and EIGRP routing protocols. Electronics IFi?ig?u GToderean 2013 International Conference on IEEE 2013 * A survey of energy efficient routing protocol in MANET. Electronics and Communication Systems (ICECS) KChawda DGorana 2nd International Conference on IEEE 2015. 2015 * bPerformance analysis of dynamic routing protocol EIGRP and OSPF in IPv4 and IPv6 network CWijaya 2011 First International Conference on IEEE 2011 * Performance Evaluation of Different Routing Protocols in IPv4 and IPv6 Networks on the basis of Packet Sizes DChauhan SSharma Procedia computer science 46 2015 * RFC 2640, Internet Protocol, version 6 (IPv6) Specification SEDeering RHinden IETF RFC 2460 1 * IPv6 celebrates its 20th birthday by reaching 10 percent deployment IVBeijnum 2016 * OSPF for IPv6 RColtun DFerguson JMoy ALindem Internet Engineering Task Force, Request For Comments (StandardsTrack) RFC 5340 2008 * Compression format for IPv6 datagrams over IEEE 802 JHui PThubert 2011 * Routing and mobility approaches in IPv6 over LoWPAN mesh networks LMOliveira AFDe Sousa International Journal of Communication Systems 24 11 2011 IEEE 802.15. 4-based networks * Advanced Routing CCarthern WWilson RBedwell NRivera Cisco Networks 2015 Springer