Research paper on ipv6 technology

Related model essay:

Application of p>Ipv6 in campus network of colleges and universities

Abstract? Want it? In this paper, the basic concept of ipv6, the implementation technology of ipv6 and the current technology to realize ipv6 are expounded. Combined with the practical solution of ipv6 in school campus network, the configuration of ipv6 on Cisco653, the configuration of ipv6 on Cisco6513, the core equipment of network, and the practical application of ipv6 in our school campus network are systematically described. ?

keywords? ipv6； Tunnel technology; Dual protocol stack technology

1? Introduction

The existing Internet operates on the basis of the IPv4 protocol. IPv6 is the next version of the Internet protocol. It was originally proposed because with the rapid development of the Internet, the limited address space defined by IPv4 will be exhausted, and the shortage of address space will definitely affect the further development of the Internet. In order to expand the address space, it is proposed to redefine the address space through IPv6. IPv4 uses 32-bit address length, with only about 4.3 billion addresses, and it is estimated that it will be allocated in 25 ~ 21, while IPv6 uses 128-bit address length, which can provide almost unlimited addresses. According to the conservative method, the actual assignable addresses of IPv6 can be estimated, and more than 1, addresses can be assigned per square meter of the whole earth. In the design process of IPv6, in addition to solving the problem of address shortage once and for all, other problems that can not be solved well in IPv4 are also considered. The main advantages of IPv6 are as follows: expanding the address space, improving the overall throughput of the network, improving the quality of service (QoS), ensuring better security, supporting plug-and-play and mobility, and better realizing the multicast function.

2? Overview of ipv6 implementation technology

from ipv4 to ipv6? The transformation must enable ipv6 to support and deal with the legacy problems of ipv4 system. At present, IETF (? Internet? Engineering? Task? Force) has set up a special working group to study ipv4? To ipv6? And many schemes have been put forward, mainly including the following types:

2.1? Dual-stack technology

When developing a dual-stack network, the host runs two protocols at the same time, making the applications turn to ipv6 one by one. For transmission. It is mainly used with ipv4? And ipv6 devices all communicate with each other. Dual stack will be in Cisco? Used on the Ios software platform to support applications, Telnet, Snmp, and other protocols on ipv6 transmission.

2.2? Tunneling technology

with the development of ipv6 network, there are many local ipv6 networks. Network, but these ipv6 networks need to pass ipv4? Backbone network connection. Will these isolated "ipv6? The interconnection of islands must use tunnel technology. Tunneling technology can be used to run ipv4 through the existing? Internet protocol? Backbone network (? That is, tunnels) connect local ipv6 networks, so it is from ipv4 to ipv6? The easiest technology to adopt in the early stage of transition.

the router will use ipv6? The data packets of are encapsulated into ipv4, ipv4? The source address and destination address of the packet are the ipv4 addresses of the tunnel entrance and exit respectively. At the exit of the tunnel, the ipv6 packet is taken out and forwarded to the destination site. Tunnel technology only requires modifications at the entrance and exit of the tunnel, and has no requirements for other parts, so it is very easy to realize. But tunnel technology can't realize ipv4? Host and ipv6? Direct communication of the host.

2.3? Network address translation/? Protocol translation technology

network address translation/? Protocol conversion technology NAT-PT(Network? Address? Translation-Protocal? Translation) with S||T? Protocol conversion and traditional ipv4? Dynamic address translation NAT under? And the appropriate application layer gateway (ALG), only ipv6 is installed. The communication between the host and most applications with only ipv4 machines installed. The above technologies largely depend on the transition from the Internet supporting ipv4 to supporting ipv6. Internet conversion, we expect ipv4? And ipv6? Can be compatible with each other in this conversion process. Currently, 6tot4? Mechanism is one of the more popular means of realization.

3? Our school campus network ipv6 solution

Our school * * * has two campuses: the old campus and the new campus. The two campuses are connected with the old campus through the Cisco6513 of the new campus, and the Cisco6513 is connected with the border exit Cisco659.

The topology diagram of the network is as follows (Figure 1):

In view of the communication between ipv4 and ipv6 and how to realize seamless connection between IPv6 network and existing IPv4 network, our school adopts

tunneling technology, double stack technology and address header translation technology to realize mutual visits to IPv6 network, that is, with the help of today's sophisticated IPv4 technology, IPv6 data packets are encapsulated and decapsulated in IPv4 format. ?

The actual ipv6 configuration of our school is as follows:

The ipv6 configuration of the core device 6573 is as follows:

interface? GigabitEthernet12/47

description? cumt? ipv6? link

ipv6? address? 21:DA8:1D:1::2/64? //? Configuration of ipv6 address for three-layer docking between 6513 and 653

interface? Vlan12

no? ip? redirects

ipv6? address? 21:DA8:1D:2::1/64//? Vlan configuration of ipv6

ipv6? enable? //start ipv6 protocol on Cisco6513

ipv6? route? ::/? 21:DA8:1D:1::1? //? Ipv6 default routing configuration

the ipv6 configuration on Cisco653 is as follows:

interface? GigabitEthernet3/47

ipv6? address? 21:DA8:1D:1::1/64? //? Configuration of ipv6 address of three-layer docking between 653 and 6513

ipv6? route? 21:DA8:1D::/48? 21:DA8:1D:1::2

ipv6? route? ::/? 21:DA8:A3:FB::1?

ipv6? unicast-routing? //? Ipv6 routing configuration

interface? Tunnel//ipv6 tunnel configuration

ipv6? address? 21:DA8:A3:FB::2/64// ipv6 address of the source

ipv6? Enable// start the ipv6 protocol

tunnel? source? 22.119.2.129? //ipv4 address of tunnel source

tunnel? destination? 22.112.53.38? //tunnel destination ipv4 address

tunnel? mode? ipv6ip? //the tunnel mode is ipv6

the configuration on the firewall of the education network is as follows:

access-list? 12? extended? permit? ip? any? host? 22.119.2.129// allows campus and off-campus access through the ipv6 tunnel

At present, ipv6 has been well applied in our school, and campus users can easily access external ipv6 network resources, and our school has also established ipv6 www server and ipv6 DNS resolution respectively to provide external users with access to our ipv6 network resources.

(Figure 1)

4? Conclusion

The good application of ipv6 in our school further embodies the powerful charm of ipv6. Although it can't completely replace ipv4 at present, it will certainly be able to replace ipv4 in the near future, thus realizing the operation of a full range of pure ipv6 networks.

references

[1]? Tunnel technology to realize the transition from ipv4 to ipv6 6tot4. Computer engineering and application. In 22? The 18th issue

[2]? Summary of Transition Technology from ipv4 to ipv6. Journal of Beijing University of Posts and Telecommunications. In 22? Issue 4

[3]? How to transition from ipv4 to ipv6? The computer age. In 24? Issue 8

Other related issues:

/view/136794.htm

The outline format of the paper

is for reference only, please learn from it yourself

I hope it will be helpful to you.